Capacity Gain from Transmitter and Receiver Cooperation
|
|
- Alexander Rice
- 5 years ago
- Views:
Transcription
1 Capacity Gain from Transmitter an Receiver Cooperation Chris T. K. Ng an Anrea J. Golsmith Dept. of Electrical Engineering Stanfor University, Stanfor, CA 90 ngctk, arxiv:cs/00800v1 [cs.it] Aug 00 Abstract Capacity gain from transmitter an receiver cooperation are compare in a relay network where the cooperating noes are close together. When all noes have equal average transmit power along with full channel state information CSI, it is prove that transmitter cooperation outperforms receiver cooperation, whereas the opposite is true when power is optimally allocate among the noes but only receiver phase CSI is available. In aition, when the noes have equal average power with receiver phase CSI only, cooperation is shown to offer no capacity improvement over a non-cooperative scheme with the same average network power. When the system is uner optimal power allocation with full CSI, the ecoe-an-forwar transmitter cooperation rate is close to its cut-set capacity upper boun, an outperforms compress-an-forwar receiver cooperation. Moreover, it is shown that full CSI is essential in transmitter cooperation, while optimal power allocation is essential in receiver cooperation. I. INTRODUCTION In a-hoc wireless networks, cooperation among noes can be exploite to improve system performance, an the benefits of transmitter an receiver cooperation have been recently investigate by several authors. The iea of cooperative iversity was pioneere in [1], [], where the transmitters cooperate by repeating etecte symbols of other transmitters. In [] the transmitters forwar parity bits of the etecte symbols, instea of the entire message, to achieve cooperation iversity. Cooperative iversity an outage behavior was stuie in []. Multiple-antenna systems an cooperative a-hoc networks were compare in [], [6]. Information-theoretic achievable rate regions an bouns were erive in [7] [11] for channels with transmitter an/or receiver cooperation. In [1] cooperative strategies for relay networks were presente. In this paper, we consier the case in which a relay can be eploye either near the transmitter, or near the receiver. Hence unlike previous works where the channel was assume given, we treat the placement of the relay, an thus the resulting channel, as a esign parameter. Capacity improvement from cooperation is consiere uner system moels of full or partial channel state information CSI, with optimal or equal power allocation. II. SYSTEM MODEL Consier a iscrete-time aitive white Gaussian noise AWGN wireless channel. To exploit cooperation, a relay can be eploye either close to the transmitter to form a transmitter cluster, or close to the receiver to form a receiver cluster, as ge jθ Relay Transmitter e jθ e jθ1 Receiver a Transmitter cooperation Fig. 1. Transmitter e jθ1 Cooperation system moel. Relay e jθ ge jθ b Receiver cooperation Receiver illustrate in Fig. 1. In the transmitter cluster configuration, suppose the channel magnitue between the cluster an the receiver is normalize to unity, while within the cluster it is enote by g. The transmitter cooperation relay network in Fig. 1a is then escribe by y 1 = ge jθ x + n 1, y = e jθ1 x + e jθ x 1 + n, 1 where x, y, n, x 1, y 1, n 1 C, g 0, an θ 1, θ, θ [0, π]: x is the signal sent by the transmitter, y is the signal receive by the receiver, y 1, x 1 are the receive an transmitte signals of the relay, respectively, an n, n 1 are inepenent zero-mean unit-variance complex Gaussian ranom variables. Similarly, the receiver cooperation relay network in Fig. 1b is given by y 1 = e jθ x + n 1, y = e jθ1 x + ge jθ x 1 + n. The output of the relay epens causally on its past inputs, an there is an average network power constraint on the system: E [ x + x 1 ] P, where the expectation is taken over repeate channel uses. We compare the rate achieve by transmitter cooperation versus that by receiver cooperation uner ifferent operational environments. We consier two moels of CSI: i every noe has full CSI; ii only receiver phase CSI is available i.e., the relay knows θ, the receiver knows θ 1, θ, an g is assume to be known to all. In aition, we also consier two moels of power allocation: i power is optimally allocate between the transmitter an the relay, i.e., E [ x ] αp, E [ x 1 ] 1 αp, where α [0, 1] is a parameter to be optimize; ii the network is homogeneous an all noes have equal average power constraints, i.e., E [ x ] = E [ x 1 ] = P/. Power allocation in an AWGN relay network with arbitrary channel gains was treate in [9]; in this paper we only consier the case when the cooperating noes form a cluster. Combining the ifferent consierations of CSI an power allocation moels,
2 Case Case 1 Case Case Case Description Optimal power allocation with full CSI Equal power allocation with full CSI Optimal power allocation with receiver phase CSI Equal power allocation with receiver phase CSI TABLE I COOPERATION UNDER DIFFERENT OPERATIONAL ENVIRONMENTS Notation Description Transmitter cooperation cut-set boun Decoe-an-forwar transmitter cooperation rate Receiver cooperation cut-set boun Compress-an-forwar receiver cooperation rate Non-cooperative channel capacity TABLE II NOTATIONS FOR THE UPPER BOUNDS AND ACHIEVABLE RATES Table I enumerates the four cases uner which the benefits of transmitter an receiver cooperation are investigate in the next section. III. COOPERATION STRATEGIES The three-terminal networks shown in Fig. 1 are relay channels [1], [1], an their capacity is not known in general. The cut-set boun escribe in [1], [1] provies a capacity upper boun. Achievable rates obtaine by two coing strategies were also given in [1]. The first strategy [1, Thm. 1] has become known as along with other slightly varie nomenclature ecoe-an-forwar [], [7], [1], an the secon one [1, Thm. 6] compress-an-forwar [8], [9], [1]. In particular, it was shown in [1] that ecoean-forwar approaches capacity an achieves capacity uner certain conitions when the relay is near the transmitter, whereas compress-an-forwar is close to optimum when the relay is near the receiver. Therefore, in our analysis ecoe-an-forwar is use in transmitter cooperation, while compress-an-forwar is use in receiver cooperation. Notations for the upper bouns an achievable rates are summarize in Table II. A superscript is use, when applicable, to enote which case liste in Table I is uner consieration; e.g., Ct 1 correspons to the transmitter cut-set boun in Case 1. For comparison, represents the noncooperative channel capacity when the relay is not available an the transmitter has average power P ; hence = C1, where Cx log 1 + xp. Suppose that the transmitter is operating uner an average power constraint αp, 0 α 1, an the relay uner constraint 1 αp. Then for the transmitter cooperation configuration epicte in Fig. 1a, the cut-set boun is = max min C αg + 11 ρ, C 1 + ρ } α1 α, where ρ represents the correlation between the transmitte signals of the transmitter an the relay. With optimal power allocation in Case 1 an Case, α is to be further optimize, whereas α = 1/ in Case an Case uner equal power allocation. In the ecoe-an-forwar transmitter cooperation strategy, transmission is one in blocks: the relay first fully ecoes the transmitter s message in one block, then in the ensuing block the relay an the transmitter cooperatively sen the message to the receiver. The following rate can be achieve: = max min C αg1 ρ, C 1 + ρ α1 α }, where ρ an α carry similar interpretations as escribe above in. Note that R g t = C g 1 t for g 1, which can be use to ai the calculation of in the subsequent sections. For the receiver cooperation configuration shown in Fig. 1b, the cut-set boun is = max min C α1 ρ, C α + 1 αg + ρ } α1 αg. In the compress-an-forwar receiver cooperation strategy, the relay sens a compresse version of its observe signal to the receiver. The compression is realize using Wyner-Ziv source coing [16], which exploits the correlation between the receive signal of the relay an that of the receiver. The following rate is achievable: α1 αg = C 1 αg+α+1/p. + α 6 Likewise, in an 6 α nees to be optimize in Case 1 an Case, an α = 1/ in Case an Case. Case 1: Optimal power allocation with full CSI Consier the transmitter cooperation cut-set boun in. Recognizing the first term insie min } is a ecreasing function of ρ, while the secon one is an increasing one, the optimal ρ can be foun by equating the two terms or maximizing the lesser term if they o not equate. Next the optimal α can be calculate by setting its erivative to zero. The other upper bouns an achievable rates, unless otherwise note, can be optimize using similar techniques; thus in the following sections they will be state without repeating the analogous arguments. The transmitter cooperation cut-set boun is foun to be C 1 t = C g+1 g+, 7 with ρ = g/g +, α = g + /g +. The ecoean-forwar transmitter cooperation rate is Rt 1 = C g g+1 if g 1, Cg if g < 1, 8 with ρ = g 1/g +, α = g+/g+ if g 1, an ρ = 0, α = 1 otherwise. It can be observe that the transmitter cooperation rate Rt 1 in 8 is close to its upper boun Ct 1 in 7 when g 1. For receiver cooperation, the cut-set boun is given by C 1 r = C g+1 g+, 9
3 .... Rate bps Rate bps.. R r Fig.. Cut-set bouns an achievable rates in Case 1. with ρ = 1/ g + g +, α = g +g+/g +g+. The expression of the optimal value α for the compressan-forwar receiver cooperation rate in 6 is complicate, an oes not facilitate straightforwar comparison of Rr 1 with the other upper bouns an achievable rates. A simpler upper boun to Rr 1, however, can be obtaine by omitting the term 1/P in the enominator in 6 as follows: Rr 1 = max C α1 αg 0 α 1 1 αg+α+1/p + α 10 < max 0 α 1 C α1 αg 1 αg+α + α R r. 11 Since the term 1 αg + α in the enominator in 10 ranges between an g, the upper boun in 11 is tight when g > an P 1. Specifically, for g >, the receiver cooperation rate upper boun is foun to be = C g g 1 1g 1 g 1 g 1g, 1 with the upper boun s optimal α = gg 1 g 1 g g+. Note that the transmitter an receiver cut-set bouns C 1 t an C 1 r are ientical. However, for > g > 1, it can be shown that the ecoe-an-forwar transmitter cooperation rate R 1 t outperforms the compress-an-forwar receiver cooperation upper boun R r. Moreover, the ecoe-an-forwar rate is close to the cut-set bouns when g ; therefore, transmitter cooperation is the preferable strategy when the system is uner optimal power allocation with full CSI. Numerical examples of the upper bouns an achievable rates are shown in Fig.. In all plots of the numerical results, we assume the channel has unit banwith, the system has an average network power constraint P = 0, an is the istance between the relay an its cooperating noe. We assume a pathloss power attenuation exponent of, an hence g = 1/. The vertical otte lines mark = 1/ an = 1, which correspon to g = an g = 1, respectively. We are intereste in capacity improvement when the cooperating noes are close together, an < 1/ or g > is the region of our main focus Fig.. Cut-set bouns an achievable rates in Case. Case : Equal power allocation with full CSI With equal power allocation, both the transmitter an the relay are uner an average power constraint of P/, an so α is set to 1/. For transmitter cooperation, the cut-set capacity upper boun is foun to be C t = C g g+1 if g 1, C 1+g if g < 1, 1 with ρ = g 1/g+1 if g 1, an ρ = 0 otherwise. Incientally, the boun Ct in 1 coincies with the transmitter cooperation rate Rt 1 in 8 obtaine in Case 1 for g 1. Next, the ecoe-an-forwar transmitter cooperation rate is given by Rt = C g 1 g if g, C g if g <, 1 with ρ = g /g if g, an ρ = 0 otherwise. Similar to Case 1, the transmitter cooperation rate Rt in 1 is close to its upper boun Ct in 1 when g 1. For receiver cooperation, the corresponing cut-set boun resolves to Cr 1+ g g = C1 if g 1, C if g < 1, 1 with ρ = 0 for g 1, an ρ = g g/ otherwise. Lastly, the compress-an-forwar receiver cooperation rate is g Rr = C g++/p It can be observe that if the cooperating noes are close together such that g >, the transmitter cooperation rate R t is strictly higher than the receiver cooperation cut-set boun C r ; therefore, transmitter cooperation conclusively outperforms receiver cooperation when the system is uner equal power allocation with full CSI. Fig. illustrates the transmitter an receiver cooperation upper bouns an achievable rates. Case : Optimal power allocation with receiver phase CSI When remote phase information is not available, it was erive in [9], [1] that it is optimal to set ρ = 0 in the cutset bouns,, an the ecoe-an-forwar transmitter cooperation rate. Intuitively, with only receiver phase CSI,
4 .... Rate bps Rate bps.. R r Fig.. Cut-set bouns an achievable rates in Case. the relay an the transmitter, being unable to realize the gain from coherent combining, resort to sening uncorrelate signals. The receiver cooperation strategy of compress-an-forwar, on the other han, i not make use of remote phase information [1], an so the receiver cooperation rate is still given by 6 with the power allocation parameter α optimally chosen. Uner the transmitter cooperation configuration, the cut-set boun is foun to be C t = C1, 17 where α is any value in the range [1/g + 1, 1]. When the relay is close to the transmitter g 1, the ecoe-anforwar strategy is capacity achieving, as reporte in [1]. Specifically, the transmitter cooperation rate is given by Rt = C1 if g 1, Cg if g < 1, 18 where α is any value in the range [1/g, 1] if g 1, an α = 1 otherwise. For receiver cooperation, the cut-set boun is Cr = C g g+1 if g 1, C1 if g < 1, 19 where α = g/g+1 if g > 1, α = 1 if g < 1, an α is any value in the range [g/g + 1, 1] if g = 1. Since compressan-forwar oes not require remote phase information, the receiver cooperation rate is the same as 10 given in Case 1: R r = R 1 r. Note that the argument insie C in 10 is 1 when α = 1, an hence R r C1. In contrast to Case, the receiver cooperation rate R r in equals or outperforms the transmitter cooperation cut-set boun C t ; consequently receiver cooperation is the superior strategy when the system is uner optimal power allocation with only receiver phase CSI. Numerical examples of the upper bouns an achievable rates are shown in Fig.. Case : Equal power allocation with receiver phase CSI With equal power allocation, α is set to 1/. With only receiver phase CSI, similar to Case, ρ = 0 is optimal for the cut-set bouns an ecoe-an-forwar rate. Therefore, in Fig.. Cut-set bouns an achievable rates in Case. this case no optimization is necessary, an the bouns an achievable rates can be reaily evaluate. For transmitter cooperation, the cut-set boun an the ecoe-an-forwar rate, respectively, are Ct = C1 if g 1, C 1+g R t = C1 if g, if g < 1, 0 C g if g <. 1 For receiver cooperation, the cut-set boun is Cr = C1 if g 1, C 1+g if g < 1, an the compress-an-forwar rate is the same as 16 in Case : Rr = Rr. Parallel to Case 1, the transmitter an receiver cooperation cut-set bouns Ct an Cr are ientical. Note that the noncooperative capacity meets the cut-set bouns when g 1, an even beats the bouns when g < 1. Hence it can be conclue cooperation offers no capacity improvement when the system is uner equal power allocation with only receiver phase CSI. Numerical examples are plotte in Fig.. IV. IMPLEMENTATION STRATEGIES In the previous section, for each given operational environment we erive the most avantageous cooperation strategy. The available moe of cooperation is sometimes ictate by practical system constraints, however. For instance, in a wireless sensor network collecting measurements for a single remote base station, only transmitter cooperation is possible. In this section, for a given transmitter or receiver cluster, the trae-off between cooperation capacity gain an implementation complexity is investigate. The upper bouns an achievable rates from the previous section are summarize, an orere, in Table III: the rate of an upper row is at least as high as that of a lower one. It is assume that the cooperating noes are close together such that g >. The transmitter cooperation rates are plotte in Fig. 6. It can be observe that optimal power allocation contributes only marginal aitional capacity gain over equal power allocation, while having full CSI is essential to achieving any cooperative capacity gain. Accoringly, in transmitter
5 Cooperation Scheme C 1 t, C1 r R 1 t,, C r R t R r R 1 r, R r, C r, C t, R t,,, R r, Rate bps Rate C g+1 g+ C g g+1 g 1 C g g g 1 1g 1 g 1 C g 1g max C α1 αg 0 α 1 1 αg+α+1/p + α C1 g C g++/p + 1 TABLE III COOPERATION RATES COMPARISON C 1 R 1 C R C, C, R, R Fig. 6. Transmitter Cooperation cooperation, homogeneous noes with common battery an amplifier specifications can be employe to simplify network eployment, but synchronous-carrier shoul be consiere necessary. On the other han, in receiver cooperation, the compressan-forwar scheme oes not require full CSI, but optimal power allocation is crucial in attaining cooperative capacity gain, as illustrate in Fig. 7. When remote phase information is not utilize i.e., ρ = 0, as note in [7], carrier-level synchronization is not require between the relay an the transmitter; implementation complexity is thus significantly reuce. It is important, however, to allow for the network noes to have ifferent power requirements an power allocation be optimize among them. V. CONCLUSION We have stuie the capacity improvement from transmitter an receiver cooperation when the cooperating noes form a cluster in a relay network. It was shown that electing the proper cooperation strategy base on the operational environment is a key factor in realizing the benefits of cooperation in an a-hoc wireless network. When full CSI is available, transmitter cooperation is the preferable strategy. On the other han, when remote phase information is not available but power can be optimally allocate, the superior strategy is receiver cooperation. Finally, when the system is uner equal Rate bps C 1 C R 1, R C, C R, R Fig. 7. Receiver Cooperation power allocation with receiver phase CSI only, cooperation offers no capacity improvement over a non-cooperative singletransmitter single-receiver channel uner the same average network power constraint. REFERENCES [1] A. Senonaris, E. Erkip, an B. Aazhang, User cooperation iversity Part I: System escription, IEEE Trans. Commun., vol. 1, no. 11, pp , Nov. 00. [], User cooperation iversity Part II: Implementation aspects an performance analysis, IEEE Trans. Commun., vol. 1, no. 11, pp , Nov. 00. [] T. E. Hunter an A. Nosratinia, Cooperation iversity through coing, in Proc. IEEE Int. Symp. Inform. Theory, 00. [] J. N. Laneman, D. N. C. Tse, an G. W. Wornell, Cooperative iversity in wireless networks: Efficient protocols an outage behavior, IEEE Trans. Inform. Theory, vol. 0, no. 1, pp , Dec. 00. [] N. Jinal, U. Mitra, an A. J. Golsmith, Capacity of a-hoc networks with noe cooperation, in Proc. IEEE Int. Symp. Inform. Theory, 00, also in preparation for IEEE Trans. Inform. Theory. [6] C. T. K. Ng an A. J. Golsmith, Transmitter cooperation in a-hoc wireless networks: Does irty-payer coing beat relaying? in Proc. IEEE Inform. Theory Workshop, San Antonio, Texas, Oct. 00. [7] A. Host-Masen, Capacity bouns for cooperative iversity, IEEE Trans. Inform. Theory, submitte for publication. [Online]. Available: masen/papers [8] M. A. Khojastepour, A. Sabharwal, an B. Aazhang, Improve achievable rates for user cooperation an relay channels, in Proc. IEEE Int. Symp. Inform. Theory, 00. [9] A. Host-Masen an J. Zhang, Capacity bouns an power allocation for wireless relay channel, IEEE Trans. Inform. Theory, submitte for publication. [Online]. Available: masen/papers [10] A. Host-Masen, On the achievable rate for receiver cooperation in a-hoc networks, in Proc. IEEE Int. Symp. Inform. Theory, 00. [11], A new achievable rate for cooperative iversity base on generalize writing on irty paper, in Proc. IEEE Int. Symp. Inform. Theory, 00. [1] G. Kramer, M. Gastpar, an P. Gupta, Cooperative strategies an capacity theorems for relay networks, IEEE Trans. Inform. Theory, Feb. 00, to be publishe. [Online]. Available: [1] E. C. van er Meulen, Three-terminal communication channels, Av. Appl. Prob., vol., pp. 10 1, [1] T. M. Cover an A. A. El Gamal, Capacity theorems for the relay channel, IEEE Trans. Inform. Theory, vol., no., [1] T. M. Cover an J. A. Thomas, Elements of Information Theory. Wiley- Interscience, [16] A. D. Wyner an J. Ziv, The rate-istortion function for source coing with sie information at the ecoer, IEEE Trans. Inform. Theory, vol., no. 1, pp. 1 10, Jan
Capacity and Cooperation in Wireless Networks
Capacity and Cooperation in Wireless Networks Chris T. K. Ng and Andrea J. Goldsmith Stanford University Abstract We consider fundamental capacity limits in wireless networks where nodes can cooperate
More informationResource Allocation for Cooperative Transmission in Wireless Networks with Orthogonal Users
Resource Allocation for Cooperative Transmission in Wireless Networks with Orthogonal Users D. Richar Brown III Electrical an Computer Engineering Department Worcester Polytechnic Institute Worcester,
More informationCapacity Gain from Two-Transmitter and Two-Receiver Cooperation
Capacity Gain from Two-Transmitter and Two-Receiver Cooperation Chris T. K. Ng, Student Member, IEEE, Nihar Jindal, Member, IEEE, Andrea J. Goldsmith, Fellow, IEEE and Urbashi Mitra, Fellow, IEEE arxiv:0704.3644v1
More informationSECONDARY TRANSMISSION POWER OF COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS
SECONDARY TRANSMISSION POWER OF COGNITIVE RADIOS FOR DYNAMIC SPECTRUM ACCESS Xiaohua Li 1 1 Department of ECE State University of New York at Binghamton Binghamton, NY 139, USA {xli,jhwu1}@binghamton.eu
More informationJoint Relaying and Network Coding in Wireless Networks
Joint Relaying and Network Coding in Wireless Networks Sachin Katti Ivana Marić Andrea Goldsmith Dina Katabi Muriel Médard MIT Stanford Stanford MIT MIT Abstract Relaying is a fundamental building block
More informationROC Analysis of BLM Detector in AF Relays Based Cooperative Wireless Networks Omar GATERA 1, Ahmet Hamdi KAYRAN 1 and Haci ILHAN 2
6 International Conference on Sustainable Energy, Environment an Information Engineering (SEEIE 6) ISBN: 978--6595-337-3 ROC Analys of BLM Detector in AF Relays Base Cooperative Wireless Networks Omar
More informationPerformance Analysis and Comparison of ZF and MRT Based Downlink Massive MIMO Systems
Performance Analysis an Comparison of ZF an MRT Base Downlink Massive MIMO Systems Tebe Parfait, Yujun uang, 1,2 ponyo Jerry 1 Mobilelink Lab Univ of Electronic Sci an Tech of China, UESTC Chengu, China
More informationJoint Cooperative Relaying and Jamming for Maximum Secrecy Capacity in Wireless Networks
Joint Cooperative Relaying an Jamming for Maximum Secrecy Capacity in Wireless Networks Li Wang, Chunyan Cao, Mei Song an Yu Cheng Beijing Key Laboratory of Work Safety Intelligent Monitoring School of
More informationJoint Partial Relay Selection, Power Allocation and Cooperative Maximum Likelihood Detection for MIMO Relay Systems with Limited Feedback
Joint Partial Relay Selection, Power Allocation an Cooperative Maximum Likelihoo Detection for MIMO Relay Systems with Limite Feeback Thomas Hesketh, Rorigo C. e Lamare, Stephen Wales Department of Electronics,
More informationOUTAGE MINIMIZATION BY OPPORTUNISTIC COOPERATION. Deniz Gunduz, Elza Erkip
OUTAGE MINIMIZATION BY OPPORTUNISTIC COOPERATION Deniz Gunduz, Elza Erkip Department of Electrical and Computer Engineering Polytechnic University Brooklyn, NY 11201, USA ABSTRACT We consider a wireless
More informationCross-layer Routing Optimization for Wireless Networks with Cooperative Diversity
Cross-layer Routing Optimiation for Wireless Networs with Cooperative Diversity Zhiguo Ding an Kin K. Leung Department of Electrical an Electronic Engineering Imperial College Lonon, UK. Email: {higuo.ing,
More informationSpace-Division Relay: A High-Rate Cooperation Scheme for Fading Multiple-Access Channels
Space-ivision Relay: A High-Rate Cooperation Scheme for Fading Multiple-Access Channels Arumugam Kannan and John R. Barry School of ECE, Georgia Institute of Technology Atlanta, GA 0-050 USA, {aru, barry}@ece.gatech.edu
More informationEnergy Efficient Virtual MIMO-based Cooperative Communications for Wireless Sensor Networks
Energy Efficient Virtual MIMO-base Cooperative Communications for Wireless Sensor Networks Suharman K. Jayaweera Department of Electrical an Computer Engineering Wichita State University, Wichita, KS,
More informationTopology-assisted techniques to relay selection for homogeneously distributed wireless sensor networks
This full text paper was peer reviewe at the irection of IEEE Communications Society subject matter experts for publication in the IEEE Globecom 2010 proceeings. Topology-assiste techniques to relay selection
More informationBounds on Achievable Rates for Cooperative Channel Coding
Bounds on Achievable Rates for Cooperative Channel Coding Ameesh Pandya and Greg Pottie Department of Electrical Engineering University of California, Los Angeles {ameesh, pottie}@ee.ucla.edu Abstract
More informationIN GENERAL, an optical network can consist of a
1 Geometric Capacity Provisioning for Wavelength-Switche WDM Networks Li-Wei Chen, Eytan Moiano Abstract In this paper, we use an asymptotic analysis similar to the sphere-packing argument in the proof
More informationMODELLING OF GPS SIGNAL LARGE SCALE PROPAGATION CHARACTERISTICS IN URBAN AREAS FOR PRECISE NAVIGATION
Int. J. Elec&Electr.Eng&Telcomm. 2012 G Sateesh Kumar et al., 2012 Research Paper ISSN 2319 2518 www.ijeetc.com Vol. 1, No. 1, October 2012 2012 IJEETC. All Rights Reserve MODELLING OF GPS SIGNAL LARGE
More informationSPECTRUM SHARING IN CRN USING ARP PROTOCOL- ANALYSIS OF HIGH DATA RATE
Int. J. Chem. Sci.: 14(S3), 2016, 794-800 ISSN 0972-768X www.sadgurupublications.com SPECTRUM SHARING IN CRN USING ARP PROTOCOL- ANALYSIS OF HIGH DATA RATE ADITYA SAI *, ARSHEYA AFRAN and PRIYANKA Information
More informationThe Z Channel. Nihar Jindal Department of Electrical Engineering Stanford University, Stanford, CA
The Z Channel Sriram Vishwanath Dept. of Elec. and Computer Engg. Univ. of Texas at Austin, Austin, TX E-mail : sriram@ece.utexas.edu Nihar Jindal Department of Electrical Engineering Stanford University,
More informationCache-Aided Content Delivery in Fog-RAN Systems with Topological Information and no CSI
Cache-Aie Content Delivery in Fog-RAN Systems with Topological Information an no CSI Wei-Ting Chang, Ravi Tanon, Osvalo Simeone Abstract In this work, we consier a Fog Raio Access Network (F-RAN) system
More informationRelay Deployment and Power Control for Lifetime Elongation in Sensor Networks
Relay Deployment an Power Control for Lifetime Elongation in Sensor Networks Yufeng Xin, Tuna Güven, Mark Shayman Institute of Avance Computer Stuies University of Marylan, College Park, MD 074 e-mail:
More informationA Circuit Level Fault Model for Resistive Shorts of MOS Gate Oxide
Circuit Level Fault Moel for esistive Shorts of MOS Gate Oxie Xiang Lu, Zhuo Li, Wangqi Qiu, D. M. H. Walker an Weiping Shi Dept. of Electrical Engineering Texas &M University College Station, TX 77843-34,
More informationPerformance of Amplify-and-Forward Relaying with Wireless Power Transfer over Dissimilar Channels
http://x.oi.org/.5755/ j.eee..5.333 ELEKTRONIKA IR ELEKTROTECHNIKA ISSN 39-5 VOL. NO. 5 5 Performance of Amplify-an-Forwar Relaying with Wireless Power Transfer over Dissimilar Channels Dac-Binh Ha Duc-Dung
More informationSirindhorn International Institute of Technology Thammasat University at Rangsit. ECS 455: Problem Set 1
Sirinhorn International Institute of Technology Thammasat University at Rangsit School of Information, Computer an Communication Technology ECS 455: Problem Set 1 Semester/Year: /016 Course Title: Mobile
More informationAN APPLICATION OF A GENERALISED JAKES MODEL FOR MIMO CHANNELS
AN APPLICATION OF A GENERALISED JAKES MODEL FOR MIMO CHANNELS Davi B. Smith (1) (1) Faculty of Engineering (Telecommunications), University of Technology Syney PO Box 13 Broaway NS 007 Australia E-mail:
More informationSecure Communication with a Wireless-Powered Friendly Jammer
Secure Communication with a Wireless-Powere Frienly Jammer Wanchun Liu, Xiangyun Zhou, Salman Durrani, an Petar Popovski arxiv:42.0349v2 [cs.it] 26 Aug 205 Abstract In this paper, we propose to use a wireless-powere
More information3432 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 53, NO. 10, OCTOBER 2007
3432 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL 53, NO 10, OCTOBER 2007 Resource Allocation for Wireless Fading Relay Channels: Max-Min Solution Yingbin Liang, Member, IEEE, Venugopal V Veeravalli, Fellow,
More informationOptimum Power Allocation in Cooperative Networks
Optimum Power Allocation in Cooperative Networks Jaime Adeane, Miguel R.D. Rodrigues, and Ian J. Wassell Laboratory for Communication Engineering Department of Engineering University of Cambridge 5 JJ
More informationWhen Network Coding and Dirty Paper Coding meet in a Cooperative Ad Hoc Network
When Network Coding and Dirty Paper Coding meet in a Cooperative Ad Hoc Network Nadia Fawaz, David Gesbert Mobile Communications Department, Eurecom Institute Sophia-Antipolis, France {fawaz, gesbert}@eurecom.fr
More informationPerformance Analysis of Cooperative Communication System with a SISO system in Flat Fading Rayleigh channel
Performance Analysis of Cooperative Communication System with a SISO system in Flat Fading Rayleigh channel Sara Viqar 1, Shoab Ahmed 2, Zaka ul Mustafa 3 and Waleed Ejaz 4 1, 2, 3 National University
More informationSpace-Time Coded Cooperative Multicasting with Maximal Ratio Combining and Incremental Redundancy
Space-Time Coded Cooperative Multicasting with Maximal Ratio Combining and Incremental Redundancy Aitor del Coso, Osvaldo Simeone, Yeheskel Bar-ness and Christian Ibars Centre Tecnològic de Telecomunicacions
More informationAmplify-and-Forward Space-Time Coded Cooperation via Incremental Relaying Behrouz Maham and Are Hjørungnes
Amplify-and-Forward Space-Time Coded Cooperation via Incremental elaying Behrouz Maham and Are Hjørungnes UniK University Graduate Center, University of Oslo Instituttveien-5, N-7, Kjeller, Norway behrouz@unik.no,
More informationEnergy Efficient Relay Selection for Cooperative Relaying in Wireless Multimedia Networks
Energy Efficient Relay Selection for Cooperative Relaying in Wireless Multimeia Networks Zhengguo Sheng, Jun Fan, Chi Harol Liu, Victor C. M. Leung, Xue Liu*, an Kin K. Leung Orange Labs, France Telecom,
More informationNETWORK CODING GAIN OF COOPERATIVE DIVERSITY
NETWORK COING GAIN OF COOPERATIVE IVERITY J Nicholas Laneman epartment of Electrical Engineering University of Notre ame Notre ame, Indiana 46556 Email: jlaneman@ndedu ABTRACT Cooperative diversity allows
More informationTwo Models for Noisy Feedback in MIMO Channels
Two Models for Noisy Feedback in MIMO Channels Vaneet Aggarwal Princeton University Princeton, NJ 08544 vaggarwa@princeton.edu Gajanana Krishna Stanford University Stanford, CA 94305 gkrishna@stanford.edu
More informationDynamic Resource Allocation for Multi Source-Destination Relay Networks
Dynamic Resource Allocation for Multi Source-Destination Relay Networks Onur Sahin, Elza Erkip Electrical and Computer Engineering, Polytechnic University, Brooklyn, New York, USA Email: osahin0@utopia.poly.edu,
More informationCooperative Communications: A New Trend in the Wireless World
Cooperative Communications: A New Trend in the Wireless World Gordhan Das Menghwar, Akhtar Ali Jalbani, Mukhtiar Memon, Mansoor Hyder Information Technology Centre Sindh Agriculture University Tandojam,
More informationWireless Powered Dual-Hop Multiple Antenna Relay Transmission in the Presence of Interference
EEE CC 05 - Wireless Communications Symposium Wireless Powere Dual-Hop Multiple Antenna Relay Transmission in the Presence of nterference Guangxu Zhu, Caijun Zhong, Himal A. Suraweera, George K. Karagianniis,
More informationOn the Achievable Diversity-vs-Multiplexing Tradeoff in Cooperative Channels
On the Achievable Diversity-vs-Multiplexing Tradeoff in Cooperative Channels Kambiz Azarian, Hesham El Gamal, and Philip Schniter Dept of Electrical Engineering, The Ohio State University Columbus, OH
More informationDegrees of Freedom of Multi-hop MIMO Broadcast Networks with Delayed CSIT
Degrees of Freedom of Multi-hop MIMO Broadcast Networs with Delayed CSIT Zhao Wang, Ming Xiao, Chao Wang, and Miael Soglund arxiv:0.56v [cs.it] Oct 0 Abstract We study the sum degrees of freedom (DoF)
More informationCooperative Diversity Routing in Wireless Networks
Cooperative Diversity Routing in Wireless Networks Mostafa Dehghan, Majid Ghaderi, and Dennis L. Goeckel Department of Computer Science, University of Calgary, Emails: {mdehghan, mghaderi}@ucalgary.ca
More informationShadowing Correlation Model for Indoor Multi-hop Radio Link in Office Environment
JAVA, International Journal of Electrical Electronics Engineering Volume 4, Number, April 26 Shaowing Moel for Inoor Multi-hop Raio Link in Office Environment Mohamma Fahli Inustrial Engineering Department
More informationPower and Bandwidth Allocation in Cooperative Dirty Paper Coding
Power and Bandwidth Allocation in Cooperative Dirty Paper Coding Chris T. K. Ng 1, Nihar Jindal 2 Andrea J. Goldsmith 3, Urbashi Mitra 4 1 Stanford University/MIT, 2 Univeristy of Minnesota 3 Stanford
More informationDegrees of Freedom in Multiuser MIMO
Degrees of Freedom in Multiuser MIMO Syed A Jafar Electrical Engineering and Computer Science University of California Irvine, California, 92697-2625 Email: syed@eceuciedu Maralle J Fakhereddin Department
More informationProbabilistic Handshake in All-to-all Broadcast Coded Slotted ALOHA
Probabilistic Hanshake in All-to-all Broacast Coe Slotte ALOHA Mikhail Ivanov, Petar Popovski, Frerik Brännström, Alexanre Graell i Amat, an Čeomir Stefanović Department of Signals an Systems, Chalmers
More informationAssessment of Combined Integrity Algorithms
Assessment of Combine Integrity Algorithms C. Stöber an F. Kneißl Institute of Geoesy an Navigation, University FAF Munich ICG WG-B, Munich, 8.3.1 1/6 OUTLINE Overview User Equations Comparison of Integrity
More informationISSN Vol.07,Issue.01, January-2015, Pages:
ISSN 2348 2370 Vol.07,Issue.01, January-2015, Pages:0145-0150 www.ijatir.org A Novel Approach for Delay-Limited Source and Channel Coding of Quasi- Stationary Sources over Block Fading Channels: Design
More informationAN-1140 APPLICATION NOTE
APPLICATION NOTE One Technology Way P.O. Box 9106 Norwoo, MA 02062-9106, U.S.A. Tel: 781.329.4700 Fax: 781.461.3113 www.analog.com Microphone Array Beamforming by Jera Lewis INTRODUCTION All MEMS microphones
More informationBalanced-energy Sleep Scheduling Scheme for High Density Cluster-based Sensor Networks
Balance-energy Sleep Scheuling Scheme for High Density Cluster-base Sensor Networks Jing Deng, unghsiang S. Han, Weni B. Heinzelman, an Pramo K. Varshney Abstract In orer to conserve battery power in very
More informationA Cost Analysis of Wireless Mesh Networks
04 th International Symposium on Moeling an Optimization in Mobile, A Hoc, an Wireless Networks (WiOpt) A Cost Analysis of Wireless Mesh Networks Valerio Targon Queen Mary University of Lonon & Alpen-Aria-Universität
More informationAbstract Harvesting energy from ambient environment is a new promising solution to free electronic devices from electric
Wireless Communication System with RF-base Energy Harvesting: From Information Theory to Green System Tao Li, Pingyi Fan, Senior Member, IEEE, Khale Ben Letaief, Fellow, IEEE arxiv:1411.6087v1 [cs.it]
More informationRelay Selection in Cooperative Networks with Frequency Selective Fading
Worcester Polytechnic Institute igital WPI Electrical & Computer Engineering Faculty Publications epartment of Electrical an Computer Engineering 2011 Relay Selection in Cooperative Networks with Frequency
More informationPower and Energy Consumption for Multi-Hop Protocols: A Sensor Network Point of View
Power and Energy Consumption for Multi-Hop Protocols: A Sensor Network Point of View Katja Schwieger and Gerhard Fettweis Vodafone Chair Mobile Communications Systems resden University of Technology, Mommsenstr.
More informationDegrees of Freedom of the MIMO X Channel
Degrees of Freedom of the MIMO X Channel Syed A. Jafar Electrical Engineering and Computer Science University of California Irvine Irvine California 9697 USA Email: syed@uci.edu Shlomo Shamai (Shitz) Department
More informationReliability and Route Diversity in Wireless Networks
2005 Conference on Information Sciences an Sstems, The Johns Hopkins Universit, March 16 18, 2005 Reliabilit an Route Diversit in Wireless Networks Ehsan Khanani, Etan Moiano, Jinane Abounai, Lizhong Zheng
More informationANALYSIS AND DESIGN OF MAPPINGS FOR ITERATIVE DECODING OF BICM 1
Fran Schrecenbach an Patric Henel Institute for Communications Engineering (LNT) Munich University of Technology (TUM) 8090 Munich, Germany fran.schrecenbach@tum.e Norbert Görtz School of Engineering an
More informationResearch Article How to Solve the Problem of Bad Performance of Cooperative Protocols at Low SNR
Hindawi Publishing Corporation EURAIP Journal on Advances in ignal Processing Volume 2008, Article I 243153, 7 pages doi:10.1155/2008/243153 Research Article How to olve the Problem of Bad Performance
More informationFractional Cooperation and the Max-Min Rate in a Multi-Source Cooperative Network
Fractional Cooperation and the Max-Min Rate in a Multi-Source Cooperative Network Ehsan Karamad and Raviraj Adve The Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of
More informationRECENTLY, the 2G standard GSM was enhanced by
274 IEEE TRANSACTIONS ON WIREESS COMMUNICATIONS, VO. 5, NO. 2, FEBRUARY 2006 The Training Sequence Coe Depenence of EDGE Receivers using Zero IF Sampling Martin Krueger, Member, IEEE, Robert Denk, an Bin
More informationDynamic Hybrid Duplex for Rate Maximization in OFDMA. Sangmin Oh and Chae Y. Lee
Dynamic Hybri Duplex for Rate Maximization in OFDMA Sangmin Oh an Chae Y. Lee Dept. of Inustrial Engineering, KAIST, 373-1 Kusung Dong, Taeon, Korea Tel: +82-42-350-5916, FAX: +82-42-350-3110 Email: {sangmin.oh,
More informationIndoor Positioning Using Ultrasound and Radio Combination
Inoor Positioning Using Ultrasoun an Raio Combination Gintautas Salcius, Evalas Povilaitis, Algimantas Tacilauskas Centre of Real Time Computer Systems, Kaunas University of Technology Stuentu St. 50,
More informationA Turnover based Adaptive HELLO Protocol for Mobile Ad Hoc and Sensor Networks
A Turnover base Aaptive HELLO Protocol for Mobile A Hoc an Sensor Networks François Ingelrest, Nathalie Mitton, Davi Simplot-Ryl To cite this version: François Ingelrest, Nathalie Mitton, Davi Simplot-Ryl.
More informationRadio Range Adjustment for Energy Efficient Wireless Sensor Networks. Electronic Engineering, Aston University, Birmingham B4 7ET,United Kingdom b
Raio Range Ajustment for Energy Efficient Wireless Sensor Networks Q. Gao a,, K. J. Blow a 1, D. J. Holing a, I. W. Marshall b, X. H. Peng a a Electronic Engineering, Aston University, Birmingham B4 7ET,Unite
More informationPractical Cooperative Coding for Half-Duplex Relay Channels
Practical Cooperative Coding for Half-Duplex Relay Channels Noah Jacobsen Alcatel-Lucent 600 Mountain Avenue Murray Hill, NJ 07974 jacobsen@alcatel-lucent.com Abstract Simple variations on rate-compatible
More informationSoft Channel Encoding; A Comparison of Algorithms for Soft Information Relaying
IWSSIP, -3 April, Vienna, Austria ISBN 978-3--38-4 Soft Channel Encoding; A Comparison of Algorithms for Soft Information Relaying Mehdi Mortazawi Molu Institute of Telecommunications Vienna University
More informationNew M-ary QAM Transmission Payload System
r AIAA ICSSC-005 New M-ary QAM Transmission Payloa System Masayoshi TANAKA * Nihon University, College of Inustrial Technology, --, Izumicho, Narashino, 75-8575, Japan This paper presents a new M-ary moulation
More informationCooperative Spectrum Sharing in Cognitive Radio Networks: A Game-Theoretic Approach
Cooperative Spectrum Sharing in Cognitive Radio Networks: A Game-Theoretic Approach Haobing Wang, Lin Gao, Xiaoying Gan, Xinbing Wang, Ekram Hossain 2. Department of Electronic Engineering, Shanghai Jiao
More informationOptimum Threshold for SNR-based Selective Digital Relaying Schemes in Cooperative Wireless Networks
Optimum Threshold for SNR-based Selective Digital Relaying Schemes in Cooperative Wireless Networks Furuzan Atay Onat, Abdulkareem Adinoyi, Yijia Fan, Halim Yanikomeroglu, and John S. Thompson Broadband
More informationINTERFERENCE REJECTION PERFORMANCE AS A MEANS OF FREQUENCY OPTIMISATION IN A MIXED CELLULAR/MANET NETWORK
ITERFERECE REJECTIO PERFORMACE A A MEA OF FREQUECY OPTIMIATIO I A MIXED CELLULAR/MAET ETORK Kayonne ebley Faculty Avisor: Dr. Richar Dean Department of Electrical an Computer Engineering Morgan tate University
More informationarxiv: v2 [cs.it] 29 Mar 2014
1 Spectral Efficiency and Outage Performance for Hybrid D2D-Infrastructure Uplink Cooperation Ahmad Abu Al Haija and Mai Vu Abstract arxiv:1312.2169v2 [cs.it] 29 Mar 2014 We propose a time-division uplink
More informationIndoor Wireless Planning using Smart Antennas
Inoor Wireless Planning using Smart Antennas Ali Abbasi an Maji Ghaeri Department of Computer Science, University of Calgary Emails: {abbasi, mghaeri}@ucalgary.ca Abstract This paper consiers the problem
More informationMinimum-Energy Broadcast in All-Wireless Networks: NP-Completeness and Distribution Issues
Minimum-Energy Broacast in All-Wireless Networks: NP-Completeness an Distribution Issues Mario Čagal LCA-EPFL CH-05 Lausanne Switzerlan mario.cagal@epfl.ch Jean-Pierre Hubaux LCA-EPFL CH-05 Lausanne Switzerlan
More informationEffect of Carrier Frequency Offset on the BER Performance of Variable Spreading Factor OFCDM Systems
This full text paper was peer reviewe at the irection of IEEE Communications Society subject matter experts for publication in the ICC 008 proceeings. Effect of Carrier Frequency Offset on the erformance
More informationThe Multi-way Relay Channel
The Multi-way Relay Channel Deniz Gündüz, Aylin Yener, Andrea Goldsmith, H. Vincent Poor Department of Electrical Engineering, Stanford University, Stanford, CA Department of Electrical Engineering, Princeton
More informationCooperative Frequency Reuse for the Downlink of Cellular Systems
Cooperative Frequency Reuse for the Downlink of Cellular Systems Salam Akoum, Marie Zwingelstein-Colin, Robert W. Heath Jr., and Merouane Debbah Department of Electrical & Computer Engineering Wireless
More informationExploiting Interference through Cooperation and Cognition
Exploiting Interference through Cooperation and Cognition Stanford June 14, 2009 Joint work with A. Goldsmith, R. Dabora, G. Kramer and S. Shamai (Shitz) The Role of Wireless in the Future The Role of
More informationIterative and One-shot Conferencing in Relay Channels
Iterative and One-shot onferencin in Relay hannels hris T. K. N, Ivana Maric, Andrea J. Goldsmith, Shlomo Shamai (Shitz) and Roy D. Yates Dept. of Electrical Enineerin, Stanford University, Stanford, A
More informationTHe notion of the disease [1] has been extended from
IEEE/ACM TRANSACTIONS ON NETWORK SCIENCE AND ENGINEERING, VOL., NO., 6 Effective Network Quarantine with Minimal Restrictions on Communication Activities uanyang Zheng an Jie Wu, Fellow, IEEE Abstract
More informationA General Algorithm for Interference Alignment and Cancellation in Wireless Networks
A General Algorithm for Interference Alignment an Cancellation in Wireless Networks Li Erran Li, Richar Alimi, Dawei Shen, Harish Viswanathan an Y. Richar Yang Bell Labs MIT Yale University Abstract Physical
More informationAn Orthogonal Relay Protocol with Improved Diversity-Multiplexing Tradeoff
SUBMITTED TO IEEE TRANS. WIRELESS COMMNS., NOV. 2009 1 An Orthogonal Relay Protocol with Improved Diversity-Multiplexing Tradeoff K. V. Srinivas, Raviraj Adve Abstract Cooperative relaying helps improve
More informationOptimal Partner Selection and Power Allocation for Amplify and Forward Cooperative Diversity
Optimal Partner Selection and Power Allocation for Amplify and Forward Cooperative Diversity Hadi Goudarzi EE School, Sharif University of Tech. Tehran, Iran h_goudarzi@ee.sharif.edu Mohamad Reza Pakravan
More informationPerformance Analysis of Maximum Likelihood Detection in a MIMO Antenna System
IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 50, NO. 2, FEBRUARY 2002 187 Performance Analysis of Maximum Likelihood Detection in a MIMO Antenna System Xu Zhu Ross D. Murch, Senior Member, IEEE Abstract In
More informationA NEW PUZZLE FOR ITERATED COMPLETE GRAPHS OF ANY DIMENSION
A NEW PUZZLE FOR ITERATED COMPLETE GRAPHS OF ANY DIMENSION ELIZABETH SKUBAK AND NICHOLAS STEVENSON ADVISOR: PAUL CULL OREGON STATE UNIVERSITY ABSTRACT. The Towers of Hanoi puzzle can be use to label a
More informationOn Coding for Cooperative Data Exchange
On Coding for Cooperative Data Exchange Salim El Rouayheb Texas A&M University Email: rouayheb@tamu.edu Alex Sprintson Texas A&M University Email: spalex@tamu.edu Parastoo Sadeghi Australian National University
More informationOn the performance of truncated type III hybrid ARQ scheme with code combining
WIRELESS COMMUNICATIONS AND MOBILE COMPUTING Wirel. Commun. Mob. Comput. 2003; 3:641 658 (DOI: 10.1002/wcm.147) On the performance of truncate type III hybri ARQ scheme with coe combining Qingchun Chen*,y
More informationIN RECENT years, wireless multiple-input multiple-output
1936 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 3, NO. 6, NOVEMBER 2004 On Strategies of Multiuser MIMO Transmit Signal Processing Ruly Lai-U Choi, Michel T. Ivrlač, Ross D. Murch, and Wolfgang
More informationRelay Selection for Low-Complexity Coded Cooperation
Relay Selection for Low-Complexity Coded Cooperation Josephine P. K. Chu,RavirajS.Adve and Andrew W. Eckford Dept. of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
More informationSignal Transmission Through LTI Systems EE 442 Spring 2017 Lecture 3. Signal Transmission
Signal Transmission Through LTI Systems EE 442 Spring 207 Lecture 3 Signal Transmission Steay-State Response in Linear Time Invariant Network By steay-state we mean an sinusoial excitation. x(t) LTI Network
More informationMeasurement of Semi-Anechoic Chamber Using Modified VSWR method above 1GHz
Measurement of Semi-Anechoic Chamber Using Moifie VSWR metho above 1GHz M. Bittera, K. Kováč, J. Hallon Department of Measurement, Faculty of Electrical Engineering an Information Technology, Slovak University
More informationMath 32A Discussion Session Week 9 Notes November 28 and 30, 2017
Math 3A Discussion Session Week 9 Notes November 8 an 30, 07 This week we ll explore some of the ieas from chapter 5, focusing mostly on the graient. We ll motivate this exploration with an example that
More informationTHE EFFECT of multipath fading in wireless systems can
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 47, NO. 1, FEBRUARY 1998 119 The Diversity Gain of Transmit Diversity in Wireless Systems with Rayleigh Fading Jack H. Winters, Fellow, IEEE Abstract In
More informationConstruction of Power Efficient Routing Tree for Ad Hoc Wireless Networks using Directional Antenna
Construction of Power Efficient Routing Tree for A Hoc Wireless Networks using Directional Antenna Qing Dai an Jie Wu Department of Computer Science an Engineering Floria Atlantic University Boca Raton,
More informationState of the Cognitive Interference Channel
State of the Cognitive Interference Channel Stefano Rini, Ph.D. candidate, srini2@uic.edu Daniela Tuninetti, danielat@uic.edu Natasha Devroye, devroye@uic.edu Interference channel Tx 1 DM Cognitive interference
More informationOpportunities, Constraints, and Benefits of Relaying in the Presence of Interference
Opportunities, Constraints, and Benefits of Relaying in the Presence of Interference Peter Rost, Gerhard Fettweis Technische Universität Dresden, Vodafone Chair Mobile Communications Systems, 01069 Dresden,
More informationAdaptive Resource Allocation in Wireless Relay Networks
Adaptive Resource Allocation in Wireless Relay Networks Tobias Renk Email: renk@int.uni-karlsruhe.de Dimitar Iankov Email: iankov@int.uni-karlsruhe.de Friedrich K. Jondral Email: fj@int.uni-karlsruhe.de
More informationStrategic Versus Collaborative Power Control in Relay Fading Channels
Strategic Versus Collaborative Power Control in Relay Fading Channels Shuangqing Wei Department of Electrical and Computer Eng. Louisiana State University Baton Rouge, LA 70803 Email: swei@ece.lsu.edu
More informationA SURVEY ON COOPERATIVE DIVERSITY AND ITS APPLICATIONS IN VARIOUS WIRELESS NETWORKS
A SURVEY ON COOPERATIVE DIVERSITY AND ITS APPLICATIONS IN VARIOUS WIRELESS NETWORKS Gurpreet Kaur 1 and Partha Pratim Bhattacharya 2 Department of Electronics and Communication Engineering Faculty of Engineering
More informationPERFORMANCE OF TWO-PATH SUCCESSIVE RELAYING IN THE PRESENCE OF INTER-RELAY INTERFERENCE
PERFORMANCE OF TWO-PATH SUCCESSIVE RELAYING IN THE PRESENCE OF INTER-RELAY INTERFERENCE 1 QIAN YU LIAU, 2 CHEE YEN LEOW Wireless Communication Centre, Faculty of Electrical Engineering, Universiti Teknologi
More informationComputing functions over wireless networks
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License. Based on a work at decision.csl.illinois.edu See last page and http://creativecommons.org/licenses/by-nc-nd/3.0/
More informationWHEN NETWORK CODING AND DIRTY PAPER CODING MEET IN A COOPERATIVE AD HOC NETWORK
WHEN NETWORK CODING AND DIRTY PAPER CODING MEET IN A COOPERATIVE AD HOC NETWORK Nadia Fawaz, David Gesbert, Merouane Debbah To cite this version: Nadia Fawaz, David Gesbert, Merouane Debbah. WHEN NETWORK
More information