Adaptation of AMO-FBMC-OQAM in optical access network for accommodating asynchronous multiple access in OFDM based uplink transmission
|
|
- Kelley Cooper
- 5 years ago
- Views:
Transcription
1 Adaptation of AMO-FBMC-OQAM in optical access network for accommodating asynchronous multiple access in OFDM based uplink transmission Sun-Young Jung, Sang-Min Jung, Sang-Kook Han Dept. of Electrical and Electronic Engineering, Yonsei Univ. 50 Yonsei-ro, Seodaemum-gu, Seoul , Republic of Korea ABSTRACT Exponentially expanding various applications in company with proliferation of mobile devices make mobile traffic exploded annually. For future access network, bandwidth efficient and asynchronous signals converged transmission technique is required in optical network to meet a huge bandwidth demand, while integrating various services and satisfying multiple access in perceived network resource. Orthogonal frequency division multiplexing (OFDM) is highly bandwidth efficient parallel transmission technique based on orthogonal subcarriers. OFDM has been widely studied in wired-/wireless communication and became a Long term evolution (LTE) standard. Consequently, OFDM also has been actively researched in optical network. However, OFDM is vulnerable frequency and phase offset essentially because of its sinc-shaped side lobes, therefore tight synchronism is necessary to maintain orthogonality. Moreover, redundant cyclic prefix (CP) is required in dispersive channel. Additionally, side lobes act as interference among users in multiple access. Thus, it practically hinders from supporting integration of various services and multiple access based on OFDM optical transmission In this paper, adaptively modulated optical filter bank multicarrier system with offset QAM (AMO-FBMC-OQAM) is introduced and experimentally investigated in uplink optical transmission to relax multiple access interference (MAI), while improving bandwidth efficiency. Side lobes are effectively suppressed by using FBMC, therefore the system becomes robust to path difference and imbalance among optical network units (ONUs), which increase bandwidth efficiency by reducing redundancy. In comparison with OFDM, a signal performance and an efficiency of frequency utilization are improved in the same experimental condition. It enables optical network to effectively support heterogeneous services and multiple access. Keywords: OFDM, FBMC, OQAM, adaptive modulation, optical uplink transmission, sidelobes suppression, optical multiple access, asynchronous waveform. 1. INTRODUCTION Exponentially expanding various applications in company with proliferation of mobile devices make mobile traffic exploded annually. Recently, technical requirements for fifth-generation (5G) wireless communications have been discussed to support a future wireless access network, after long-term-evolution-advanced (LTE-A). For examples, Internet of things (IoT), gigabit wireless connectivity and cooperative multipoint (CoMP) were stated as key requirements for 5G [1], [2]. In order to accommodate these applications, the future access network should have high bandwidth efficiency, as well as it should support seamless integration of asynchronous multiple users. For accommodating 5G wireless communications, optical access network should also have high efficiency in spectrum utilization and effectively support the asynchronous multiple access to meet a huge bandwidth demand, while integrating various services and satisfying multiple access in perceived network resource. In the LTE-A wireless communications, orthogonal frequency division multiplexing (OFDM) has been used as a standard [3]. OFDM is a highly spectrum efficient transmission technique based on overlapped multiple subcarriers. Moreover, it could maximize total capacity within certain bit-error-rate (BER) by employing adaptive modulation [3], [4]. Furthermore, OFDM is robust against dispersion by using cyclic prefix. For all those reasons, OFDM based transmission systems have been actively researched not only wireless communications but also optical communications Next-Generation Optical Communication: Components, Sub-Systems, and Systems IV, edited by Guifang Li, Xiang Zhou, Proc. of SPIE Vol. 9389, 93890Q 2015 SPIE CCC code: X/15/$18 doi: / Proc. of SPIE Vol Q-1
2 [5]. However, due to rectangular window of IFFT/FFT, OFDM essentially possess sinc-shaped sidelobes, which causes multiple access interference (MAI) in uplink transmission; moreover, MAI increased as increasing users [6]. To avoid the MAI among ONUs, it is required that a tight synchronization or a large frequency guard interval between ONUs in OFDM based multiple access (OFDMA). The tight synchronization of optical uplink signals is obviously inefficient in conventional passive optical network (PON) and the large guard band waste frequency resource and reduce spectral efficiency (SE). Thus, OFDMA could not effectively support the asynchronous multiple signals in optical uplink transmission, although OFDM has a high SE. Filter bank based multicarrier (FBMC) system is realized by prototype filter which responds to subcarrier [7], which has been spotlighted in wireless communications recently, but it is still new in optical communications. By using well designed prototype filter, FBMC could suppress sidelobes and relax the tight synchronization requirement between asynchronously combined signals. The amount of sidelobes suppression and spectrum confinement are decided by forming the shape of prototype filter. Mirabbasi-Martin equation based prototype filter is estimated as the best among the known filters in terms of sidelobes suppression [8]. In optical communications, a raised cosine filter or a root raised cosine filter were applied to shape the spectrum of optical signal [9], [10], but Mirabbasi-Martin filter was firstly employed in our group. Previously, we demonstrated sidelobes suppression and interference reduction when wired- /wireless signals were converged in optical downlink transmission [11], but optical uplink transmission was not verified. In this paper, to solve the interference problem of OFDMA, FBMC based multiple access (FBMC-MA) realized by Mirabbasi-Martin prototype filter was employed in optical multiple access of asynchronous optical uplink signals. We experimentally demonstrate performance improvement of FBMC-MA by comparative analysis with OFDMA. 2. SCHEMATICS Figure 1 presents optical uplink transmission based on OFDMA and FBMC-MA in PON system. Each ONUs is independently modulated as an optical signal with their best effort having unequal electro-optic (E/O) conversion efficiency, and then passed through different optical path. At optical combining region, the optical signals are passively and asynchronously combined and transmitted through single mode fiber (SMF). In this scenario, as illustrated in Figure 1, the ONUs interfere each other due to their sidelobes in case of OFDMA and these sidelobes could be effectively suppressed by employing FBMC in optical multiple access. In order to suppress sidelobes, FBMC was realized based on digital filter at overlapping factor K=4. The frequency ONU 1 ONU 2 ONU 1 (E/O) Independent, Unequal ONU 2 (E/O) Optical path difference ONU! ONU 2 Passive optical combine (Asynchronous) COD OLT (0/E, DSP) FBMC-MA Side lobes suppression t ONU I ONU 2 Figure 1. Optical multiple access based on OFDM and FBMC in passive optical network uplink transmission. OFDM FBMC PPN based filtering (K=4) With OQAM+ overlap & sum A Channel estimation ltap equalizing F F T 4-4- OFDM Remove CP FBMC PPN based filtarina (K=4) & sum Down sample & time synchron ization 4- D o Figure 2. Block diagram of OFDM and FBMC modulation/demodulation process. Proc. of SPIE Vol Q-2
3 130 Frequency do n rl F r (a) OFDM (b) FBMC (c) OFDM Time domain With 128 subcarriers and 10 symbol frame sequence Figure 3. Modulated signals in case of OFDM and FBMC. Offset (JAM real Q imaginary iramada; atepw timzeor eaw. SI,SCR Sear Half symbol duration offset Time shift & overlap/ sine & cosine plane r0/2 co 3r /2 2r0 Figure 4. Offset QAM and offset of a half-symbol-duration. coefficients of the filter for K=4 (H 0, H 1, H 2, H 3 ) are 1, , 2/2, , respectively [7]. In order to perform FBMC based filtering, frequency domain oversampling is required for an extended FFT filtering; it increases FFT size by K times. The FFT size limited practical real time process, and it occupies most of computational complexity in OFDM process. Thus, polyphase network (PPN) structure [7] was used to maintain FFT size by using repetitive time domain characteristic. After filtering process in Figure 2, FBMC could suppress not only side lobes in spectrum but also edge power of time domain signal as illustrated in Figure 3; therefore, FBMC is robust against dispersion without cyclic prefix (CP), which could improve SE. Even though sidelobes are suppressed, orghogonality between the directly adjacent subcarriers is broken in FBMC (Figure 3(b)). In order to satisfy orthogonality among subcarriers, offset QAM (OQAM) was introduced as illustrated in Figure 4. The real part and imaginary part of FBMC was alternatively assigned at an even/odd subcarrier for OQAM process, which reduces total capacity by half. To maintain total capacity of FBMC as same as that of OFDM, an offset of half-symbol-duration was also employed with OQAM; it utilizes a repetitive property of output waveform of FBMC-OQAM and an orthogonality of sine/cosine plane. Thus, by using PPN with OQAM, total capacity and computational complexity of FBMC could be comparable with OFDM. 3. EXPERIMENT Figure 5 presents experimental setup and system parameters. Multicarrier based optical multiple access was experimentally demonstrated in case of two different ONUs in IM/DD system. Individual ONU was independently modulated by Mach-Zehnder modulator (MZM). Bias current, input RF signal power and input optical polarization were optimized according to individual MZM condition; thus, each ONU had different performance due to unequal device response. The light source wavelength of ONU1 and ONU2 were nm and nm, respectively, in order to exclude an effect from optical beating interference (OBI) [12]. The modulated optical signals from each ONU passed through different optical path, which causes multipath delay spread. At optical distribution network (ODN), these signals were combined passively and asynchronously, which means power imbalance and MAI between the multiplexed signals were included. After optical combining, the uplink signal transmitted through SMF. For performance comparison, both experiments for OFDMA and FBMC-MA were conducted under same condition. As shown in Figure 2, OFDM and FBMC signals were realized by using offline process with same manners, and as shown in Figure 5, the used parameters were equal excepting CP length and filter shape. Redundant CP (1/16 of symbol duration) was inserted in OFDM only, which decreases SE of OFDM due to increased transmitting symbol duration. Instead of CP insertion, Mirabbasi-Martin equation based filtering was induced in FBMC to suppress sidelobes and confine spectrum. In FBMC generation, PPN Proc. of SPIE Vol Q-3
4 PM - power monitor VOA -variable optical attenuator AWG - arbitrary waveform generator DPO - digital phosphor oscilloscope VSG - vector signal generator VSA - vector signal analyzer 1.5GHz BW, 20NUs,N =128 (a) AMO -OFDM (b) AMO -FBMC nm db 36S DFB -LD nm +S.SdBm PC VOA Unused in B2B case DPO 50GS/s P BdBm VOA -14dBm VOA 3 Figure 5. Experimental setup and used parameters. based digital filtering and OQAM with the offset of half-symbol-duration were used to maintain computational complexity and total capacity compared to OFDM. The number of subcarrier was 128 and IFFT/FFT size was 256 due to Hermitian symmetry for intensity modulation in both OFDM and FBMC. The used signal bandwidth was 1.5GHz and initial modulation order for preamble was 2 (4QAM) without adaptive modulation. The preamble was used to estimate channel state for adaptive modulation. According to the feedback channel state information (CSI) obtained from preamble, different bits were allocated to corresponding subcarriers based on water-filling algorithm. By employing adaptive modulation, total achievable capacity could be maximized within a certain BER; in this experiment, target BER was assuming Reed-Solomon (255, 239) forward error correction (FEC). The preamble was also used for single-tap equalizer as well as a correlation based synchronization process in receiver side (OLT). In order to evaluate the effect caused from power imbalance that could be possibly generated in PON system, ONU1 power was attenuated just before optical combiner (3dB coupler), while the PD input power was maintained for fair comparison. Moreover, to observe the influence resulted from optical path difference, a short optical fiber was inserted before optical combining. 4. RESULTS AND DISCUSSIONS Figure 6 shows a spectrum hole when ten subcarriers were nulled-out to observe sidelobes. Figures (a) and (b) present the spectrum hole shape of OFDM and FBMC, respectively. Sinc-shaped sidelobes are obviously expressed in case of OFDM. In case of FBMC, the sidelobes are effectively suppressed, as well as a lower noise floor and steeper spectrum wall are obtained. Figure 7 presents channel error vector magnitude (EVM) estimated from preamble before adaptive modulation. Figures 7 (a) and (b) express results when signals were merged with optical power balance, while Figures (c) and (d) include power imbalance between merged ONU signals at ODN. When signals power was equally multiplexed, channel EVM of ONUs was also balanced because the amount of interference is small compared to main lobe (subcarrier) power in both Figure 6. Spectrum hole of (a) OFDM and (b) FBMC [11] Proc. of SPIE Vol Q-4
5 I Í i I! UNUl UNUZ ONU1 UNUZ UNU1 UNUZ ONU1 UNUZ 40% 40% 40% 0% 30% OFOM (-4: -4)!Y1^ FBMC(.4 : -4) FBMC(-12: -4) 30% 30% 0% OFOM (-12: -4)?0% 20% 20% 0% 10% 10% 10% 10% 0% 0% 0 71 Al QI Al PI II, 17 Al ei Bi mi im in Figure 7. Channel EVM of OFDM and FBMC when powers from ONUs were balanced/imbalanced at ODN i M [ 1", IMO II NNNNNIII NENNNN!' I [i77'}}{.,i 1ot/111a I "[SCiI'i1r,rc.i i r1,. -o-fbmc(-4 : -4) --OFDM (-4: -4) o I I I -o-fbmc(-12 : -4) --OFDM(-12 : -4) U ii Figure 8. Bit-loading profiles for adaptive modulation when multiplexed signal power was balanced/imbalanced at ODN. ONU1 and ONU2. By comparing (a) and (b), even though EVM of OFDM and FBMC seems to be similar, it could be observed that FBMC has better EVM performance because of interference reduction due to sidelobes suppression; this EVM performance variation leads difference in total capacity. Figure 7 (c) and (d) present channel EVM when the ONU1 power was attenuated to evaluate effect of power imbalance. In both (c) and (d), signal-to-noise ratio (SNR) of ONU1 was decreased due to smaller input power, thus, channel EVM of both OFDM and FBMC was degraded. However, in case of OFDMA, interference from ONU2 was obviously expressed as shown in (c). As attenuating ONU1 power, the signal power was getting smaller but sidelobes power from ONU2 was maintained, which leads degradation of SNR as well as signal-to-interference ratio (SIR). Therefore, ONU1 was only affected by SNR degradation in FBMC- MA, although the power imbalance was generated at ODN. On the other hand, in case of OFDMA, ONU1 was additionally affected by SIR degradation if multiplexed power was imbalanced. Moreover, this SIR degradation due to sidelobes interference is getting worse as power variation is increased. In Figure 8, bit-loading profiles based on channel EVM were presented when the multiplexed ONUs power was balanced and imbalanced. The number of loaded bits was decided based on CSI shown in Figure 7. By applying waterfilling algorithm, subcarrier which has better channel EVM was allocated larger bit, while subcarrier corresponding worse channel was allocated smaller bit. In case of OFDMA with power imbalance shown in Figure 7 (c), it couldn t be loaded any bit (zero-bit loading) at the boundary region due to a very bad CSI. The zero-bit allocated boundary subcarrier means that it required frequency guard interval between ONU in order to maintain the system quality of service. In case of FBMC, because FBMC-MA had better channel EVM compared to OFDMA, loaded bit of FBMC was larger than that of OFDM especially in boundary region. This effect was becoming more critical when a large power variation between multiplexed asynchronous ONU was occurred. In addition, although converged optical power was equal, the allocated number of bit was smaller in OFDM compared to FBMC because of fractional sampling synchronization error. Even though the fractional sampling error is generated in both OFDM and FBMC, but FBMC could not only suppress sidelobes but also reduce this effect. Therefore, by employing FBMC based optical multiple access in PON system which combines signals passively and asynchronously, MAI between asynchronous ONUs could be effectively reduced and frequency utilization efficiency and total transmission capacity could be increased. Proc. of SPIE Vol Q-5
6 ii i I 2m_OFDM_ONU1 2m OFDM_ONU2...I..., I ;... ``..W ,...g Ì imam % 8% 6% 4% 2% 0% 2m_FBMC_0 NU Mq 2m _FBMC_ONU2 7CCMR... ua_au..ouua_ Figure 9. Channel EVM when a 2 m optical fiber inserted in ONU1 before optical combining. Figure 9 shows delay effect due to different optical path before ODN. In PON system, it is impossible that signals from each ONU are passed through SMF with an equal length. Moreover, a small difference in optical path length causes a large multipath delay spread because light transmit with high velocity and optical fiber communications use broader signal bandwidth compare to wireless communications. As shown in Figure 9 (a) and (b), OFDMA has a large interference in boundary region between ONU, but there is almost no interference in FBMC-MA case. Due to optical path difference, ONUs lost a synchronism with each other, and become an asynchronous relation. In OFDMA case, due to sidelobes, inter-channel-interference (ICI) between ONU is generated within whole subcarriers, especially boundary subcarrier which has larger sidelobes. On the other hand, due to sidelobes suppression, FBMC-MA is robust against multipath delay spread compared to OFDMA, although same phenomenon is occurred. In order to avoid this interference caused from optical path difference, OFDM requires a large CP according to length difference; this leads degradation of SE and total capacity because CP is redundancy. Thus, FBMC-MA improved SE compared to OFDMA due to robustness against optical path difference without CP. 5. CONCLUSION OFDM has high SE and many advantageous properties, but it essentially possesses the sinc-shaped sidelobes, which hinders OFDM based multiple access in optical uplink transmission. In order to accommodate future access network like IoT, the seamless integration of asynchronous optical signals is required. However, the sidelobes of OFDM cause MAI between ONUs and the amount of interference is proportional to the number of ONUs. By adapting AMO-FBMC- OQAM in PON based optical uplink transmission, we experimentally verified that sidelobes problems of OFDM were effectively suppressed and MAI was efficiently reduced between asynchronous ONU. Therefore, it is experimentally demonstrated that performance improvement in terms of total capacity and SE through FBMC compared to OFDM. We expect that AMO-FBMC-OQAM could be an effective candidate for future access network. ACKNOWLEDGEMENT This work was supported by the ICT R&D program of MSIP/IITP, Republic of Korea. [ ] REFERENCES [1] Wunder, G. et al., 5GNOW: Non-orthogonal, asynchronous waveforms for future mobile applications, IEEE Communications Magazine, 52(2), , (2014). [2] Wunder, G. et al., 5GNOW: Challenging the LTE design paradigms of orthogonality and synchronicity, in Proc. 77th IEEE Veh. Technol. Spring Conf., Dresden, Germany, Jun. 2013, 1 5, Proc. of SPIE Vol Q-6
7 [3] Dahlman, E., Parkvall, S., and Skold, J. [4G: LTE/LTE-Advanced for Mobile Broadband, 1st ed.], Waltham, MA, USA: Academic, 1 11, (2011). [4] Giacoumidis, E. et al., Adaptive-Modulation-Enabled WDM Impairment Reduction in Multichannel Optical OFDM Transmission System for Next-Generation PONs, IEEE Photonics Journal, 2(2), , (2010). [5] Schmidt, B.J.C., Lowery, A.J., Armstrong, J., Experimental demonstrations of electronic dispersion compensation for long-haul transmission using direct detection optical OFDM, J. Lightwave Technol. 26(1), , (2008). [6] Fantacci, R., Marabissi, D., Papini, S., Multiuser Interference Cancellation Receivers for OFDMA Uplink Communications with Carrier Frequency Offset IEEE Global Telecomm. Conf., Dec. 2004, 5, , (2004). [7] Bellanger, M. et al., FBMC physical layer: a primer, PHYDYAS, Jan. 2010, (2010) [8] Sahin, A., Guvenc, I., Arslan, H., "A Survey on Multicarrier Communications: Prototype Filters, Lattice Structures, and Implementation Aspects," Comm. Surveys & Tutorials, IEEE, 16(3), , (2014). [9] Zhao, J., Ellis, A. D., Offset-QAM based coherent WDM for spectral efficiency enhancement, Optics Express, 19(15), , (2011). [10] Randel, S. et al., Study of Multicarrier Offset-QAM for Spectrally Efficient Coherent Optical Communications, 2011 European Conference and Exhibition on Optical Communication, Th.11.A.1, (2011). [11] Jung, S. Y., Han, S. M., Han, S. K., AMO-FBMC for Asynchronous Heterogeneous Signal Integrated Optical Transmission, IEEE Photon. Technol. Lett., accepted for publication (2014). [12] Wood, T. H., Shankaranarayanan, N. K., Operation of a passive optical network with subcarrier multiplexing in the presence of optical beat interference, J. Lightwave. Technol. 11(10), , (1993). Proc. of SPIE Vol Q-7
Novel OBI noise reduction technique by using similar-obi estimation in optical multiple access uplink
Vol. 25, No. 17 21 Aug 2017 OPTICS EXPRESS 20860 Novel OBI noise reduction technique by using similar-obi estimation in optical multiple access uplink HYOUNG JOON PARK, SUN-YOUNG JUNG, AND SANG-KOOK HAN
More informationChannel Equalization and Phase Noise Compensation Free DAPSK-OFDM Transmission for Coherent PON System
Compensation Free DAPSK-OFDM Transmission for Coherent PON System Volume 9, Number 5, October 2017 Open Access Kyoung-Hak Mun Sang-Min Jung Soo-Min Kang Sang-Kook Han, Senior Member, IEEE DOI: 10.1109/JPHOT.2017.2729579
More informationTiming-Offset-Tolerant Universal- Filtered Multicarrier Passive Optical Network for Asynchronous Multiservices-Over-Fiber
Kang et al. VOL. 8, NO. 4/APRIL 2016/J. OPT. COMMUN. NETW. 229 Timing-Offset-Tolerant Universal- Filtered Multicarrier Passive Optical Network for Asynchronous Multiservices-Over-Fiber Soo-Min Kang, Chang-Hun
More informationAn Enabling Waveform for 5G - QAM-FBMC: Initial Analysis
An Enabling Waveform for 5G - QAM-FBMC: Initial Analysis Yinan Qi and Mohammed Al-Imari Samsung Electronics R&D Institute UK, Staines-upon-Thames, Middlesex TW18 4QE, UK {yinan.qi, m.al-imari}@samsung.com
More informationA Flexible Testbed for 5G Waveform Generation & Analysis. Greg Jue Keysight Technologies
A Flexible Testbed for 5G Waveform Generation & Analysis Greg Jue Keysight Technologies Agenda Introduction 5G Research: Waveforms and Frequencies Desired Testbed Attributes and Proposed Approach Wireless
More informationLecture 13. Introduction to OFDM
Lecture 13 Introduction to OFDM Ref: About-OFDM.pdf Orthogonal frequency division multiplexing (OFDM) is well-known to be effective against multipath distortion. It is a multicarrier communication scheme,
More informationNew Cross-layer QoS-based Scheduling Algorithm in LTE System
New Cross-layer QoS-based Scheduling Algorithm in LTE System MOHAMED A. ABD EL- MOHAMED S. EL- MOHSEN M. TATAWY GAWAD MAHALLAWY Network Planning Dep. Network Planning Dep. Comm. & Electronics Dep. National
More informationSystem Impairments Mitigation for NGPON2 via OFDM
System Impairments Mitigation for NGPON2 via OFDM Yingkan Chen (1) Christian Ruprecht (2) Prof. Dr. Ing. Norbert Hanik (1) (1). Institute for Communications Engineering, TU Munich, Germany (2). Chair for
More informationPhase Modulator for Higher Order Dispersion Compensation in Optical OFDM System
Phase Modulator for Higher Order Dispersion Compensation in Optical OFDM System Manpreet Singh 1, Karamjit Kaur 2 Student, University College of Engineering, Punjabi University, Patiala, India 1. Assistant
More informationPerformance Evaluation using M-QAM Modulated Optical OFDM Signals
Proc. of Int. Conf. on Recent Trends in Information, Telecommunication and Computing, ITC Performance Evaluation using M-QAM Modulated Optical OFDM Signals Harsimran Jit Kaur 1 and Dr.M. L. Singh 2 1 Chitkara
More informationOFDM system: Discrete model Spectral efficiency Characteristics. OFDM based multiple access schemes. OFDM sensitivity to synchronization errors
Introduction - Motivation OFDM system: Discrete model Spectral efficiency Characteristics OFDM based multiple access schemes OFDM sensitivity to synchronization errors 4 OFDM system Main idea: to divide
More informationOptical signal suppression by a cascaded SOA/RSOA for wavelength reusing reflective PON upstream transmission
Vol. 25, No. 19 18 Sep 2017 OPTICS EXPRESS 22851 Optical signal suppression by a cascaded SOA/RSOA for wavelength reusing reflective PON upstream transmission SANG MIN JUNG, KYOUNG HAK MUN, SOO MIN KANG,
More informationPerformance Analysis Of Hybrid Optical OFDM System With High Order Dispersion Compensation
Performance Analysis Of Hybrid Optical OFDM System With High Order Dispersion Compensation Manpreet Singh Student, University College of Engineering, Punjabi University, Patiala, India. Abstract Orthogonal
More informationFilter Bank Multi-Carrier (FBMC) for Future Wireless Systems
Filter Bank Multi-Carrier (FBMC) for Future Wireless Systems CD Laboratory Workshop Ronald Nissel November 15, 2016 Motivation Slide 2 / 27 Multicarrier Modulation Frequency index, l 17 0 0 x l,k...transmitted
More information5G Waveform Approaches In Highly Asynchronous Settings
5G Waveform Approaches In Highly Asynchronous Settings Presenter: Gerhard Wunder, gerhard.wunder@hhi.fraunhofer.de EuCNC Workshop Enablers on the road to 5G June 23rd, 2014 What is 5GNOW? 5GNOW (5 th Generation
More informationWaveform Candidates for 5G Networks: Analysis and Comparison
1 Waveform Candidates for 5G Networks: Analysis and Comparison Yinsheng Liu, Xia Chen, Zhangdui Zhong, Bo Ai, Deshan Miao, Zhuyan Zhao, Jingyuan Sun, Yong Teng, and Hao Guan. arxiv:1609.02427v1 [cs.it]
More informationDecision Feedback Equalization for Filter Bank Multicarrier Systems
Decision Feedback Equalization for Filter Bank Multicarrier Systems Abhishek B G, Dr. K Sreelakshmi, Desanna M M.Tech Student, Department of Telecommunication, R. V. College of Engineering, Bengaluru,
More informationSystem-level interfaces and performance evaluation methodology for 5G physical layer based on non-orthogonal waveforms
System-level interfaces and performance evaluation methodology for 5G physical layer based on non-orthogonal waveforms Presenter: Martin Kasparick, Fraunhofer Heinrich Hertz Institute Asilomar Conference,
More informationUtilizing Self-Seeding RSOA with Faraday Rotator Mirror for Colorless Access Network
Utilizing Self-Seeding RSOA with Faraday Rotator Mirror for Colorless Access Network Yu-Fu Wu a, Jinu-Yu Sung a, and Chi-Wai Chow a, and Chien-Hung Yeh* b,c a Department of Photonics and Institute of Electro-Optical
More informationMulti-Carrier Systems
Wireless Information Transmission System Lab. Multi-Carrier Systems 2006/3/9 王森弘 Institute of Communications Engineering National Sun Yat-sen University Outline Multi-Carrier Systems Overview Multi-Carrier
More informationS PG Course in Radio Communications. Orthogonal Frequency Division Multiplexing Yu, Chia-Hao. Yu, Chia-Hao 7.2.
S-72.4210 PG Course in Radio Communications Orthogonal Frequency Division Multiplexing Yu, Chia-Hao chyu@cc.hut.fi 7.2.2006 Outline OFDM History OFDM Applications OFDM Principles Spectral shaping Synchronization
More informationPerformance Improvement of OFDM System using Raised Cosine Windowing with Variable FFT Sizes
International Journal of Research (IJR) Vol-1, Issue-6, July 14 ISSN 2348-6848 Performance Improvement of OFDM System using Raised Cosine Windowing with Variable FFT Sizes Prateek Nigam 1, Monika Sahu
More informationLocal Oscillators Phase Noise Cancellation Methods
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) e-issn: 2278-2834, p- ISSN: 2278-8735. Volume 5, Issue 1 (Jan. - Feb. 2013), PP 19-24 Local Oscillators Phase Noise Cancellation Methods
More informationPower margin improvement for OFDMA-PON using hierarchical modulation
Power margin improvement for OFDMA-PON using hierarchical modulation Pan Cao, 1 Xiaofeng Hu, 1 Zhiming Zhuang, 1 Liang Zhang, 1 Qingjiang Chang, 2 Qi Yang, 3 Rong Hu, 3 and Yikai Su 1,* 1 State Key Laboratory
More informationCarrier Frequency Offset Estimation Algorithm in the Presence of I/Q Imbalance in OFDM Systems
Carrier Frequency Offset Estimation Algorithm in the Presence of I/Q Imbalance in OFDM Systems K. Jagan Mohan, K. Suresh & J. Durga Rao Dept. of E.C.E, Chaitanya Engineering College, Vishakapatnam, India
More informationSimulative Investigations for Robust Frequency Estimation Technique in OFDM System
, pp. 187-192 http://dx.doi.org/10.14257/ijfgcn.2015.8.4.18 Simulative Investigations for Robust Frequency Estimation Technique in OFDM System Kussum Bhagat 1 and Jyoteesh Malhotra 2 1 ECE Department,
More informationSingle channel and WDM transmission of 28 Gbaud zero-guard-interval CO-OFDM
Single channel and WDM transmission of 28 Gbaud zero-guard-interval CO-OFDM Qunbi Zhuge, * Mohamed Morsy-Osman, Mohammad E. Mousa-Pasandi, Xian Xu, Mathieu Chagnon, Ziad A. El-Sahn, Chen Chen, and David
More informationSimply configured Radio on Fiber link yielding positive gain for mobile phone system
LETTER IEICE Electronics Express, Vol.11, No.15, 1 6 Simply configured Radio on Fiber link yielding positive gain for mobile phone system Junji Higashiyama 1a), Yoshiaki Tarusawa 1, and Masafumi Koga 2
More informationAnju 1, Amit Ahlawat 2
Orthogonal Frequency Division Multiplexing Anju 1, Amit Ahlawat 2 1 Hindu College of Engineering, Sonepat 2 Shri Baba Mastnath Engineering College Rohtak Abstract: OFDM was introduced in the 1950s but
More informationSingle Carrier Ofdm Immune to Intercarrier Interference
International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 10, Issue 3 (March 2014), PP.42-47 Single Carrier Ofdm Immune to Intercarrier Interference
More informationFading & OFDM Implementation Details EECS 562
Fading & OFDM Implementation Details EECS 562 1 Discrete Mulitpath Channel P ~ 2 a ( t) 2 ak ~ ( t ) P a~ ( 1 1 t ) Channel Input (Impulse) Channel Output (Impulse response) a~ 1( t) a ~2 ( t ) R a~ a~
More informationOFDMA PHY for EPoC: a Baseline Proposal. Andrea Garavaglia and Christian Pietsch Qualcomm PAGE 1
OFDMA PHY for EPoC: a Baseline Proposal Andrea Garavaglia and Christian Pietsch Qualcomm PAGE 1 Supported by Jorge Salinger (Comcast) Rick Li (Cortina) Lup Ng (Cortina) PAGE 2 Outline OFDM: motivation
More information5G 무선통신시스템설계 : WLAN/LTE/5G
1 5G 무선통신시스템설계 : WLAN/LTE/5G 김종남 Application Engineer 2017 The MathWorks, Inc. 2 Agenda Innovations in Mobile Communications Waveform Generation and End-to-end Simulation WLAN, LTE, 5G (FBMC, UFMC) RF
More informationTechniques for Mitigating the Effect of Carrier Frequency Offset in OFDM
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) e-issn: 2278-2834,p- ISSN: 2278-8735.Volume 10, Issue 3, Ver. III (May - Jun.2015), PP 31-37 www.iosrjournals.org Techniques for Mitigating
More informationOptical Fiber Technology
Optical Fiber Technology 17 (2011) 252 257 Contents lists available at ScienceDirect Optical Fiber Technology www.elsevier.com/locate/yofte Laser phase noise and OFDM symbol duration effects on the performance
More informationTechnologies for future mobile transport networks
FG IMT-2020 Workshop and Demo Day: Technology Enablers for 5G Technologies for future mobile transport networks Pham Tien Dat 1, Atsushi Kanno 1, Naokatsu Yamamoto 1, and Tetsuya Kawanishi 1,2 1 National
More informationINTERFERENCE SELF CANCELLATION IN SC-FDMA SYSTEMS -A CAMPARATIVE STUDY
INTERFERENCE SELF CANCELLATION IN SC-FDMA SYSTEMS -A CAMPARATIVE STUDY Ms Risona.v 1, Dr. Malini Suvarna 2 1 M.Tech Student, Department of Electronics and Communication Engineering, Mangalore Institute
More informationA Hybrid Synchronization Technique for the Frequency Offset Correction in OFDM
A Hybrid Synchronization Technique for the Frequency Offset Correction in OFDM Sameer S. M Department of Electronics and Electrical Communication Engineering Indian Institute of Technology Kharagpur West
More informationCHAPTER 1 INTRODUCTION
CHAPTER 1 INTRODUCTION High data-rate is desirable in many recent wireless multimedia applications [1]. Traditional single carrier modulation techniques can achieve only limited data rates due to the restrictions
More informationComparative study of 5G waveform candidates for below 6GHz air interface
Comparative study of 5G waveform candidates for below 6GHz air interface R.Gerzaguet, D. Kténas, N. Cassiau and J-B. Doré CEA-Leti Minatec Campus Grenoble, France Abstract 5G will have to cope with a high
More informationEmerging Subsea Networks
Optimization of Pulse Shaping Scheme and Multiplexing/Demultiplexing Configuration for Ultra-Dense WDM based on mqam Modulation Format Takanori Inoue, Yoshihisa Inada, Eduardo Mateo, Takaaki Ogata (NEC
More informationGigabit Transmission in 60-GHz-Band Using Optical Frequency Up-Conversion by Semiconductor Optical Amplifier and Photodiode Configuration
22 Gigabit Transmission in 60-GHz-Band Using Optical Frequency Up-Conversion by Semiconductor Optical Amplifier and Photodiode Configuration Jun-Hyuk Seo, and Woo-Young Choi Department of Electrical and
More informationChannel Estimation in Multipath fading Environment using Combined Equalizer and Diversity Techniques
International Journal of Scientific & Engineering Research Volume3, Issue 1, January 2012 1 Channel Estimation in Multipath fading Environment using Combined Equalizer and Diversity Techniques Deepmala
More informationTechnical Aspects of LTE Part I: OFDM
Technical Aspects of LTE Part I: OFDM By Mohammad Movahhedian, Ph.D., MIET, MIEEE m.movahhedian@mci.ir ITU regional workshop on Long-Term Evolution 9-11 Dec. 2013 Outline Motivation for LTE LTE Network
More information2012 LitePoint Corp LitePoint, A Teradyne Company. All rights reserved.
LTE TDD What to Test and Why 2012 LitePoint Corp. 2012 LitePoint, A Teradyne Company. All rights reserved. Agenda LTE Overview LTE Measurements Testing LTE TDD Where to Begin? Building a LTE TDD Verification
More informationComparative Study of FLIP-OFDM and ACO-OFDM for Unipolar Communication System
IJISET - International Journal of Innovative Science, Engineering & Technology, Vol. Issue, April 04. ISS 48-7968 Comparative Study of FLIP-OFDM and ACO-OFDM for Unipolar Communication System Mr. Brijesh
More informationOrthogonal frequency division multiplexing (OFDM)
Orthogonal frequency division multiplexing (OFDM) OFDM was introduced in 1950 but was only completed in 1960 s Originally grew from Multi-Carrier Modulation used in High Frequency military radio. Patent
More informationForschungszentrum Telekommunikation Wien
Forschungszentrum Telekommunikation Wien OFDMA/SC-FDMA Basics for 3GPP LTE (E-UTRA) T. Zemen April 24, 2008 Outline Part I - OFDMA and SC/FDMA basics Multipath propagation Orthogonal frequency division
More informationBit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX
Bit Error Rate Performance Evaluation of Various Modulation Techniques with Forward Error Correction Coding of WiMAX Amr Shehab Amin 37-20200 Abdelrahman Taha 31-2796 Yahia Mobasher 28-11691 Mohamed Yasser
More informationA High-Speed Bi-Directional Visible Light Communication System Based on RGB-LED
COMMUNICATIONS SYSTEM DESIGN A High-Speed Bi-Directional Visible Light Communication System Based on RGB-LED WANG Yuanquan and CHI Nan Department of Communication Science and Engineering, Fudan University,
More informationS.D.M COLLEGE OF ENGINEERING AND TECHNOLOGY
VISHVESHWARAIAH TECHNOLOGICAL UNIVERSITY S.D.M COLLEGE OF ENGINEERING AND TECHNOLOGY A seminar report on Orthogonal Frequency Division Multiplexing (OFDM) Submitted by Sandeep Katakol 2SD06CS085 8th semester
More informationA Research Concept on Bit Rate Detection using Carrier offset through Analysis of MC-CDMA SYSTEM
Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology ISSN 2320 088X IMPACT FACTOR: 5.258 IJCSMC,
More informationPractical issue: Group definition. TSTE17 System Design, CDIO. Quadrature Amplitude Modulation (QAM) Components of a digital communication system
1 2 TSTE17 System Design, CDIO Introduction telecommunication OFDM principle How to combat ISI How to reduce out of band signaling Practical issue: Group definition Project group sign up list will be put
More informationCognitive Radio Transmission Based on Chip-level Space Time Block Coded MC-DS-CDMA over Fast-Fading Channel
Journal of Scientific & Industrial Research Vol. 73, July 2014, pp. 443-447 Cognitive Radio Transmission Based on Chip-level Space Time Block Coded MC-DS-CDMA over Fast-Fading Channel S. Mohandass * and
More informationENHANCED BANDWIDTH EFFICIENCY IN WIRELESS OFDMA SYSTEMS THROUGH ADAPTIVE SLOT ALLOCATION ALGORITHM
ENHANCED BANDWIDTH EFFICIENCY IN WIRELESS OFDMA SYSTEMS THROUGH ADAPTIVE SLOT ALLOCATION ALGORITHM K.V. N. Kavitha 1, Siripurapu Venkatesh Babu 1 and N. Senthil Nathan 2 1 School of Electronics Engineering,
More information802.11ax Design Challenges. Mani Krishnan Venkatachari
802.11ax Design Challenges Mani Krishnan Venkatachari Wi-Fi: An integral part of the wireless landscape At the center of connected home Opening new frontiers for wireless connectivity Wireless Display
More informationRZ BASED DISPERSION COMPENSATION TECHNIQUE IN DWDM SYSTEM FOR BROADBAND SPECTRUM
RZ BASED DISPERSION COMPENSATION TECHNIQUE IN DWDM SYSTEM FOR BROADBAND SPECTRUM Prof. Muthumani 1, Mr. Ayyanar 2 1 Professor and HOD, 2 UG Student, Department of Electronics and Communication Engineering,
More informationThe Effect of MIRBBASI-MARTIN Filter on the Performance of Filter Bank Multicarrier Transmultiplexer System
American Journal of Information Science and Computer Engineering Vol. 5, No. 1, 2019, pp. 1-7 http://www.aiscience.org/journal/ajisce ISSN: 2381-7488 (Print); ISSN: 2381-7496 (Online) The Effect of MIRBBASI-MARTIN
More informationColorless Amplified WDM-PON Employing Broadband Light Source Seeded Optical Sources and Channel-by-Channel Dispersion Compensators for >100 km Reach
Journal of the Optical Society of Korea Vol. 18, No. 5, October 014, pp. 46-441 ISSN: 16-4776(Print) / ISSN: 09-6885(Online) DOI: http://dx.doi.org/10.807/josk.014.18.5.46 Colorless Amplified WDM-PON Employing
More informationBlind symbol synchronization for direct detection optical OFDM using a reduced number of virtual subcarriers
Blind symbol synchronization for direct detection optical OFDM using a reduced number of virtual subcarriers R. Bouziane, 1,* and R. I. Killey, 1 1 Optical Networks Group, Department of Electronic and
More informationSPARSE CHANNEL ESTIMATION BY PILOT ALLOCATION IN MIMO-OFDM SYSTEMS
SPARSE CHANNEL ESTIMATION BY PILOT ALLOCATION IN MIMO-OFDM SYSTEMS Puneetha R 1, Dr.S.Akhila 2 1 M. Tech in Digital Communication B M S College Of Engineering Karnataka, India 2 Professor Department of
More informationENHANCING BER PERFORMANCE FOR OFDM
RESEARCH ARTICLE OPEN ACCESS ENHANCING BER PERFORMANCE FOR OFDM Amol G. Bakane, Prof. Shraddha Mohod Electronics Engineering (Communication), TGPCET Nagpur Electronics & Telecommunication Engineering,TGPCET
More informationPhase Noise Compensation for Coherent Orthogonal Frequency Division Multiplexing in Optical Fiber Communications Systems
Jassim K. Hmood Department of Laser and Optoelectronic Engineering, University of Technology, Baghdad, Iraq Phase Noise Compensation for Coherent Orthogonal Frequency Division Multiplexing in Optical Fiber
More informationAn Amplified WDM-PON Using Broadband Light Source Seeded Optical Sources and a Novel Bidirectional Reach Extender
Journal of the Optical Society of Korea Vol. 15, No. 3, September 2011, pp. 222-226 DOI: http://dx.doi.org/10.3807/josk.2011.15.3.222 An Amplified WDM-PON Using Broadband Light Source Seeded Optical Sources
More informationPerformance analysis of FFT based and Wavelet Based SC-FDMA in Lte
Performance analysis of FFT based and Wavelet Based SC-FDMA in Lte Shanklesh M. Vishwakarma 1, Prof. Tushar Uplanchiwar 2,Prof.MissRohiniPochhi Dept of ECE,Tgpcet,Nagpur Abstract Single Carrier Frequency
More informationEC 551 Telecommunication System Engineering. Mohamed Khedr
EC 551 Telecommunication System Engineering Mohamed Khedr http://webmail.aast.edu/~khedr 1 Mohamed Khedr., 2008 Syllabus Tentatively Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week
More informationOptimal Number of Pilots for OFDM Systems
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) e-issn: 2278-2834,p- ISSN: 2278-8735.Volume 8, Issue 6 (Nov. - Dec. 2013), PP 25-31 Optimal Number of Pilots for OFDM Systems Onésimo
More informationCOHERENT DETECTION OPTICAL OFDM SYSTEM
342 COHERENT DETECTION OPTICAL OFDM SYSTEM Puneet Mittal, Nitesh Singh Chauhan, Anand Gaurav B.Tech student, Electronics and Communication Engineering, VIT University, Vellore, India Jabeena A Faculty,
More informationA SUBCARRIER AND BIT ALLOCATION ALGORITHM FOR MOBILE OFDMA SYSTEMS
A SUBCARRIER AND BIT ALLOCATION ALGORITHM FOR MOBILE OFDMA SYSTEMS Anderson Daniel Soares 1, Luciano Leonel Mendes 1 and Rausley A. A. Souza 1 1 Inatel Electrical Engineering Department P.O. BOX 35, Santa
More informationMITIGATING CARRIER FREQUENCY OFFSET USING NULL SUBCARRIERS
International Journal on Intelligent Electronic System, Vol. 8 No.. July 0 6 MITIGATING CARRIER FREQUENCY OFFSET USING NULL SUBCARRIERS Abstract Nisharani S N, Rajadurai C &, Department of ECE, Fatima
More informationA WDM passive optical network enabling multicasting with color-free ONUs
A WDM passive optical network enabling multicasting with color-free ONUs Yue Tian, Qingjiang Chang, and Yikai Su * State Key Laboratory of Advanced Optical Communication Systems and Networks, Department
More informationRadio Technologies for 5G Using Advanced Photonic Infrastructure for Dense User Environments
6th Japan-EU Symposium on ICT Research and Innovation Makuhari Messe, 6-7 October 2016. Radio Technologies for 5G Using Advanced Photonic Infrastructure for Dense User Environments Hiroshi Murata Osaka
More informationInternational Research Journal of Engineering and Technology (IRJET) e-issn: Volume: 03 Issue: 12 Dec p-issn:
Performance comparison analysis between Multi-FFT detection techniques in OFDM signal using 16-QAM Modulation for compensation of large Doppler shift 1 Surya Bazal 2 Pankaj Sahu 3 Shailesh Khaparkar 1
More informationORTHOGONAL frequency-division multiplexing
2370 JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 27, NO. 13, JULY 1, 2009 Optical Modulator Optimization for Orthogonal Frequency-Division Multiplexing Daniel J. Fernandes Barros and Joseph M. Kahn, Fellow,
More informationPerformance Evaluation of STBC-OFDM System for Wireless Communication
Performance Evaluation of STBC-OFDM System for Wireless Communication Apeksha Deshmukh, Prof. Dr. M. D. Kokate Department of E&TC, K.K.W.I.E.R. College, Nasik, apeksha19may@gmail.com Abstract In this paper
More informationUniversal Filtered Multicarrier for Machine type communications in 5G
Universal Filtered Multicarrier for Machine type communications in 5G Raymond Knopp and Florian Kaltenberger Eurecom Sophia-Antipolis, France Carmine Vitiello and Marco Luise Department of Information
More informationPerformance Evaluation of OFDM System with Rayleigh, Rician and AWGN Channels
Performance Evaluation of OFDM System with Rayleigh, Rician and AWGN Channels Abstract A Orthogonal Frequency Division Multiplexing (OFDM) scheme offers high spectral efficiency and better resistance to
More informationAll-VCSEL based digital coherent detection link for multi Gbit/s WDM passive optical networks
All-VCSEL based digital coherent detection link for multi Gbit/s WDM passive optical networks Roberto Rodes, 1,* Jesper Bevensee Jensen, 1 Darko Zibar, 1 Christian Neumeyr, 2 Enno Roenneberg, 2 Juergen
More informationDecrease Interference Using Adaptive Modulation and Coding
International Journal of Computer Networks and Communications Security VOL. 3, NO. 9, SEPTEMBER 2015, 378 383 Available online at: www.ijcncs.org E-ISSN 2308-9830 (Online) / ISSN 2410-0595 (Print) Decrease
More informationSPREADING SEQUENCES SELECTION FOR UPLINK AND DOWNLINK MC-CDMA SYSTEMS
SPREADING SEQUENCES SELECTION FOR UPLINK AND DOWNLINK MC-CDMA SYSTEMS S. NOBILET, J-F. HELARD, D. MOTTIER INSA/ LCST avenue des Buttes de Coësmes, RENNES FRANCE Mitsubishi Electric ITE 8 avenue des Buttes
More informationA NOVEL SCHEME FOR OPTICAL MILLIMETER WAVE GENERATION USING MZM
A NOVEL SCHEME FOR OPTICAL MILLIMETER WAVE GENERATION USING MZM Poomari S. and Arvind Chakrapani Department of Electronics and Communication Engineering, Karpagam College of Engineering, Coimbatore, Tamil
More informationAdvances in Radio Science
Advances in Radio Science, 3, 1 6, 2005 SRef-ID: 1684-9973/ars/2005-3-1 Copernicus GmbH 2005 Advances in Radio Science Robustness of IFDMA as Air Interface Candidate for Future High Rate Mobile Radio Systems
More informationTesting and Measurement of Cognitive Radio and Software Defined Radio Systems
Testing and Measurement of Cognitive Radio and Software Defined Radio Systems Hüseyin Arslan University of South Florida, Tampa, FL, USA E-mail:arslan@eng.usf.edu ABSTRACT This paper describes an overview
More informationOUT-OF-BAND RADIATION IN MULTICARRIER SYSTEMS: A COMPARISON
OUT-OF-BAND RADIATION IN MULTICARRIER SYSTEMS: A COMPARISON Leonardo G Baltar, Dirk S Waldhauser and Josef A Nossek Munich University of Technology Institute for Circuit Theory and Signal Processing Arcisstrasse
More informationPassive Optical Network Supporting Seamless Integration of RoF and OFDMA Signals
From the SelectedWorks of Innovative Research Publications IRP India Winter December 1, 2014 Passive Optical Network Supporting Seamless Integration of RoF and OFDMA Signals Innovative Research Publications,
More informationFiltered Orthogonal Frequency Division Multiplexing: A Waveform Candidate for 5G
American Journal of Engineering Research (AJER) e-issn: 2320-0847 p-issn : 2320-0936 Volume-7, Issue-1, pp-99-107 www.ajer.org Research Paper Open Access Filtered Orthogonal Frequency Division Multiplexing:
More informationWAVEFORM COMPARISON AND NONLINEARITY SENSITIVITIES OF FBMC, UFMC AND W-OFDM SYSTEMS
WAVEFORM COMPARISON AND NONLINEARITY SENSITIVITIES OF FBMC, UFMC AND W-OFDM SYSTEMS Changyoung An, Byeongjae Kim, and Heung-Gyoon Ryu Department of Electronics Engineering, Chungbuk National University,
More informationSignal Conditioning Parameters for OOFDM System
Chapter 4 Signal Conditioning Parameters for OOFDM System 4.1 Introduction The idea of SDR has been proposed for wireless transmission in 1980. Instead of relying on dedicated hardware, the network has
More informationChannel Estimation by 2D-Enhanced DFT Interpolation Supporting High-speed Movement
Channel Estimation by 2D-Enhanced DFT Interpolation Supporting High-speed Movement Channel Estimation DFT Interpolation Special Articles on Multi-dimensional MIMO Transmission Technology The Challenge
More informationFiber-wireless links supporting high-capacity W-band channels
Downloaded from orbit.dtu.dk on: Apr 05, 2019 Fiber-wireless links supporting high-capacity W-band channels Vegas Olmos, Juan José; Tafur Monroy, Idelfonso Published in: Proceedings of PIERS 2013 Publication
More informationLocal Oscillator Phase Noise Influence on Single Carrier and OFDM Modulations
Local Oscillator Phase Noise Influence on Single Carrier and OFDM Modulations Vitor Fialho,2, Fernando Fortes 2,3, and Manuela Vieira,2 Universidade Nova de Lisboa Faculdade de Ciências e Tecnologia DEE
More informationMulti-Carrier Waveforms effect on Non-Relay and Relay Cognitive Radio Based System Performances
Multi-Carrier Waveforms effect on Non-Relay and Relay Cognitive Radio Based System Performances By Carlos Faouzi Bader and Musbah Shaat Senior Associate Researcher, SIEEE Centre Tecnològic de Telecomunicacions
More informationA HIGH SPEED WDM PON FOR DOWNSTREAM DPSK ASK SIGNALS AND UPSTREAM OOK SIGNAL WITH BROADCAST CAPABILTY
A HIGH SPEED WDM PON FOR DOWNSTREAM DPSK ASK SIGNALS AND UPSTREAM OOK SIGNAL WITH BROADCAST CAPABILTY 1 AAMIR KHAN, 2 ANITA CHOPRA 1 Department of Information Technology, Suresh Gyan Vihar University,
More informationImproving Data Transmission Efficiency over Power Line Communication (PLC) System Using OFDM
Improving Data Transmission Efficiency over Power Line Communication (PLC) System Using OFDM Charles U. Ndujiuba 1, Samuel N. John 1, Oladimeji Ogunseye 2 1 Electrical & Information Engineering, Covenant
More informationBuilding versatile network upon new waveforms
Security Level: Building versatile network upon new waveforms Chan Zhou, Malte Schellmann, Egon Schulz, Alexandros Kaloxylos Huawei Technologies Duesseldorf GmbH 5G networks: A complex ecosystem 5G service
More informationThe Impact of Scheduling on Edge Windowing
The Impact of cheduling on Edge indowing Alphan ahin, tudent Member, IEEE, and Huseyin Arslan, enior Member, IEEE, University of outh Florida, Tampa, FL, 336 Email: alphan@mail.usf.edu, arslan@usf.edu
More informationClipping and Filtering Technique for reducing PAPR In OFDM
IOSR Journal of Engineering (IOSRJEN) e-issn: 2250-3021, p-issn: 2278-8719, Volume 2, Issue 9 (September 2012), PP 91-97 Clipping and Filtering Technique for reducing PAPR In OFDM Saleh Albdran 1, Ahmed
More informationOFDMA and MIMO Notes
OFDMA and MIMO Notes EE 442 Spring Semester Lecture 14 Orthogonal Frequency Division Multiplexing (OFDM) is a digital multi-carrier modulation technique extending the concept of single subcarrier modulation
More informationPERFORMANCE ENHANCEMENT OF 32 CHANNEL LONG HAUL DWDM SOLITON LINK USING ELECTRONIC DISPERSION COMPENSATION
International Journal of Electronics, Communication & Instrumentation Engineering Research and Development (IJECIERD) ISSN 2249-684X Vol. 2 Issue 4 Dec - 2012 11-16 TJPRC Pvt. Ltd., PERFORMANCE ENHANCEMENT
More informationSuppression of Side-Lobes in Orthogonal Frequency Division Multiplexing based Cognitive Radio System
Suppression of Side-Lobes in Orthogonal Frequency Division Multiplexing based Cognitive Radio System Muhammad Zahid 1, Muhammad Aamir 2, Atif Elahi 2, Sheroz Khan 3 1 MS Candidate, Department of Electronic
More information