MIMO - A Key to Broadband Wireless. Volker Jungnickel. Fraunhofer. Institut. Nachrichtentechnik Heinrich-Hertz-Institut
|
|
- Jeffry Mosley
- 6 years ago
- Views:
Transcription
1 MIMO - A Key to Broadband Wireless Volker Jungnickel
2 Outline Introduction Channel properties Algorithms Real-time implementation Conclusions 2
3 Introduction People really want wireless internet access anywhere, anytime and at low cost per bit in future: bi-directional multi-media communications Challenges develop a full-coverage symmetric broadband wireless access system (4G) for large numbers of users to communicate simultaneously in multiple cells realize high bandwidth for each user in limited spectrum Promising approach: Exploit the spatial domain! enormous bandwidth is hidden in wireless channel bandwidth can be reused by the so-called spatial multiplexing 3
4 Principle of MIMO MIMO = multiple-input multiple-output rich scattering wireless channel R1 Multiple TX antennas or users, each transmitting an independent data stream. Signal is received with multiple antennas as well. TX data DEMUX a 1 a 2 a 3 a 4 T1 T2 T3 T4 R2 R3 R4 R5 R6 Space-Time Signal Processing RX data Training phase: Based on known pilot signals, the RX learns the channel between each TX and each RX antenna. Data transmission phase: Based on the channel side information, data streams can be separated at the RX. 4
5 Channel properties: Indoors capacity [bps/hz] Tx-Rx distance ca. 1 m NLOS with LOS Rayleigh σ= 20 db number of antennas (n = n t ) r Due to rich scattering, indoor capacity increases linearly with number of antennas, with no line-of-sight (NLOS). With line-of-sight (LOS), there is a minor saturation with more than 10 RX antennas. Up to 16 times the bandwith in the same spectrum. Gbit/s WLANs, n, wireless networks in factory halls, 5
6 Channel properties: Outdoors Multi-cell multi-user scenario HHI Two applications 1 HFT single-base to mobile MIMO at link level ILR multi-base to mobile: use multiple base station antennas MATH Cross-cell MIMO at system level 6
7 Antennas Mobile terminal Base station 10 antenna elements (5 x dual polarized patches) at mobile terminal 16 antenna elements (8 x dual polarized) at base station 7
8 Short range (with free LOS) power at short distance in outdoor scenario, the probability of free line-of-sight is significant since terminal antenna elements look into different directions, just one element (h/v pol.) receives significant power singular values MIMO capacity only two useful spatial channels, due to two polarization modes reduced capacity compared to rich scattering scenario but received power is higher at short distance use adaptive modulation (per-antenna rate control) for short range 8
9 Wide area (no LOS) power at longer distance in outdoor scenario (> m), the probability of LOS is negligible all spatial channels can be loaded with data, since rich scattering is dominant singular Values MIMO capacity capacity is similar to indoors, but the received power is reduced even non-adaptive MIMO techniques may work properly important for highly mobile users 9
10 Multiple cells: Interference total coverage (power of best base in 5m square) SIR due to other bases red = minor interference, blue = interference limited path gain [db] Use antennas from multiple base stations to jointly detect users in adjacent cells! 10
11 Enhanced capacity per cell (SNR = 10 db) HHI -8 x10 2 HFT MATH ILR 1 pa th gain [lin.u.] cdf Pos capacity per cell [bps/hz] with orthogonal scheduling (GSM), resources must be shared reduced cell capacity mean capacity of isolated cells = expected with cross-cell interference cancellation joint channel capacity is even larger, due to enhanced channel rank Cross-cell MIMO processing may be a key to full-coverage broadband wireless! 11
12 Algorithms ZF: multiplies with (pseudo-) inverse channel matrix ML: looks for closest signal constellation x = [ x 1, x2] H n + y 1 H Zero Forcing decided xˆ here TX space RX space signal space ML looks here for min. dist.! 12
13 Performance 8 Tx 8 Rx, BPSK uncoded P: perfect channel information at RX CE: with realistic channel estimation (8 orthogonal pilot sequences) ML realizes full spatial diversity due to channel est. errors Better algorithms perform better are more robust against channel estimation errors but do have higher complexity 13
14 Combination with OFDM broadband MIMO OFDM: Parallel transmission on multiple narrow-band sub-carriers Waveforms remain orthogonal after passing through a multi-path channel Le istung figure from SIEMENS Zeit No intra-cell interference, unlike WCDMA Complexity is significantly reduced 14
15 MIMO-OFDM xperimental System Principle multipath channel 5 x FFT channel joint 5 detection x estimation FFT joint detection OFDM-BLAST Pilots Data compute weight matrices per OFDM Tone
16 Real-time implementation 3-antenna Tx 5-antenna Rx 3 Tx, 5 Rx antennas, 100 MHz jointly developed by HHI, IAF and SIEMENS first-in-the-world real-time data transmission at 1 Gbit/s over the air with omni-directional antennas and NLOS (no line-of-sight) efficient implementation TX : 2 FPGAs (V2/6000) RX : 2 FPGAs (V2Pro-100) 1 DSP (TI 6713/225) 100 MHz signal monitoring 16
17 1 Gbit/s transmission experiments 3 omni-directional Tx antennas are moved along a 4 m track in an office low mobility is supported 17
18 The 1 Gbit/s team Photo is taken on Nov. 30, 2004, after first trials with 3x4 configuration.
19 Thanks for cooperation Andreas Forck Thomas Haustein Holger Gäbler Dr. Udo Krüger Kirsten Krüger Volker Pohl Malte Schellmann Dr. Clemens von Helmolt Stefan Schiffermüller Armin Brylka Georghe Istoc Haifeng Chen Stefan Jaeckel Christoph Juchems Frank Luhn Marian Pollock Dr. Egon Schulz Wolfgang Zirwas Joseph Eichinger Fraunhofer HHI für angewandte Funksystemtechnik (IAF), Braunschweig Siemens München, Future Radio Concepts 19
20 Conclusions In general, MIMO is an efficient technique to exploit the spatial dimension in mobile communications. MIMO channel properties are excellent in indoor and wide-area outdoor scenarios. In short-range outdoor scenario, fading may be correlated. Adaptive transmission may be helpful in such cases. The reduced number of streams is compensated by higher order modulations, which is feasible since SNR is higher. Cross-cell MIMO-OFDM processing has the potential to remove both intra- and inter-cell interference in cellular networks with low computational complexity. We have demonstrated that MIMO-OFDM can be implemented in real-time at data rates up to 1 Gbit/s. The technology is ripe for WLAN, cellular applications need further research. MIMO-OFDM has the potential to realize full-coverage broadband wireless access with reuse of resources in each cell. 20
21 Thank you very much for listening. I am looking forward to your questions. 21
ELEC E7210: Communication Theory. Lecture 11: MIMO Systems and Space-time Communications
ELEC E7210: Communication Theory Lecture 11: MIMO Systems and Space-time Communications Overview of the last lecture MIMO systems -parallel decomposition; - beamforming; - MIMO channel capacity MIMO Key
More informationPOLARISATION DEPENDENT MIMO GAINS ON MULTIUSER DOWNLINK OFDMA WITH A 3GPP LTE AIR INTERFACE IN TYPICAL URBAN OUTDOOR SCENARIOS
POLARISATION DEPENDENT MIMO GAINS ON MULTIUSER DOWNLINK OFDMA WITH A 3GPP LTE AIR INTERFACE IN TYPICAL URBAN OUTDOOR SCENARIOS T. Wirth, V. Jungnickel, A. Forck, S. Wahls Fraunhofer Institute for Telecommunications
More informationMIMO-OFDM FOR A CELLULAR DEPLOYMENT - CONCEPTS, REAL-TIME IMPLEMENTATION AND MEASUREMENTS TOWARDS 3GPP-LTE
MIMO-OFDM FOR A CELLULAR DEPLOYMENT - CONCEPTS, REAL-TIME IMPLEMENTATION AND MEASUREMENTS TOWARDS 3GPP-LTE T. Haustein, J. Eichinger, W. Zirwas, E. Schulz Noia Siemens Networs GmbH & Co.KG, St. Martinstraße
More informationMIMO Systems and Applications
MIMO Systems and Applications Mário Marques da Silva marques.silva@ieee.org 1 Outline Introduction System Characterization for MIMO types Space-Time Block Coding (open loop) Selective Transmit Diversity
More informationMultiple Antennas. Mats Bengtsson, Björn Ottersten. Basic Transmission Schemes 1 September 8, Presentation Outline
Multiple Antennas Capacity and Basic Transmission Schemes Mats Bengtsson, Björn Ottersten Basic Transmission Schemes 1 September 8, 2005 Presentation Outline Channel capacity Some fine details and misconceptions
More informationWireless Physical Layer Concepts: Part III
Wireless Physical Layer Concepts: Part III Raj Jain Professor of CSE Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse574-08/
More informationMIMO in 4G Wireless. Presenter: Iqbal Singh Josan, P.E., PMP Director & Consulting Engineer USPurtek LLC
MIMO in 4G Wireless Presenter: Iqbal Singh Josan, P.E., PMP Director & Consulting Engineer USPurtek LLC About the presenter: Iqbal is the founder of training and consulting firm USPurtek LLC, which specializes
More informationLecture 3: Wireless Physical Layer: Modulation Techniques. Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday
Lecture 3: Wireless Physical Layer: Modulation Techniques Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday Modulation We saw a simple example of amplitude modulation in the last lecture Modulation how
More informationDESIGN OF STBC ENCODER AND DECODER FOR 2X1 AND 2X2 MIMO SYSTEM
Indian J.Sci.Res. (): 0-05, 05 ISSN: 50-038 (Online) DESIGN OF STBC ENCODER AND DECODER FOR X AND X MIMO SYSTEM VIJAY KUMAR KATGI Assistant Profesor, Department of E&CE, BKIT, Bhalki, India ABSTRACT This
More information5G System Concept Seminar. RF towards 5G. Researchers: Tommi Tuovinen, Nuutti Tervo & Aarno Pärssinen
04.02.2016 @ 5G System Concept Seminar RF towards 5G Researchers: Tommi Tuovinen, Nuutti Tervo & Aarno Pärssinen 5.2.2016 2 Outline 5G challenges for RF Key RF system assumptions Channel SNR and related
More informationThe 5th Smart Antenna Workshop 21 April 2003, Hanyang University, Korea Broadband Mobile Technology Fumiyuki Adachi
The 5th Smart Antenna Workshop 21 April 2003, Hanyang University, Korea Broadband Mobile Technology Fumiyuki Adachi Dept. of Electrical and Communications Engineering, Tohoku University, Japan adachi@ecei.tohoku.ac.jp
More informationBit Error Rate Performance Measurement of Wireless MIMO System Based on FPGA
Bit Error Rate Performance Measurement of Wireless MIMO System Based on FPGA Aravind Kumar. S, Karthikeyan. S Department of Electronics and Communication Engineering, Vandayar Engineering College, Thanjavur,
More informationStudy of Performance Evaluation of Quasi Orthogonal Space Time Block Code MIMO-OFDM System in Rician Channel for Different Modulation Schemes
Volume 4, Issue 6, June (016) Study of Performance Evaluation of Quasi Orthogonal Space Time Block Code MIMO-OFDM System in Rician Channel for Different Modulation Schemes Pranil S Mengane D. Y. Patil
More information3G Evolution. Outline. Chapter: Multi-antenna configurations. Introduction. Introduction. Multi-antenna techniques. Multiple receiver antennas, SIMO
Chapter: 3G Evolution 6 Outline Introduction Multi-antenna configurations Multi-antenna t techniques Vanja Plicanic vanja.plicanic@eit.lth.se lth Multi-antenna techniques Multiple transmitter antennas,
More informationK.NARSING RAO(08R31A0425) DEPT OF ELECTRONICS & COMMUNICATION ENGINEERING (NOVH).
Smart Antenna K.NARSING RAO(08R31A0425) DEPT OF ELECTRONICS & COMMUNICATION ENGINEERING (NOVH). ABSTRACT:- One of the most rapidly developing areas of communications is Smart Antenna systems. This paper
More informationWritten Exam Channel Modeling for Wireless Communications - ETIN10
Written Exam Channel Modeling for Wireless Communications - ETIN10 Department of Electrical and Information Technology Lund University 2017-03-13 2.00 PM - 7.00 PM A minimum of 30 out of 60 points are
More informationMultiple Antenna Processing for WiMAX
Multiple Antenna Processing for WiMAX Overview Wireless operators face a myriad of obstacles, but fundamental to the performance of any system are the propagation characteristics that restrict delivery
More informationMIMO in 3G STATUS. MIMO for high speed data in 3G systems. Outline. Information theory for wireless channels
MIMO in G STATUS MIMO for high speed data in G systems Reinaldo Valenzuela Wireless Communications Research Department Bell Laboratories MIMO (multiple antenna technologies) provides higher peak data rates
More informationMultiple Input Multiple Output (MIMO) Operation Principles
Afriyie Abraham Kwabena Multiple Input Multiple Output (MIMO) Operation Principles Helsinki Metropolia University of Applied Sciences Bachlor of Engineering Information Technology Thesis June 0 Abstract
More informationComparison of MIMO OFDM System with BPSK and QPSK Modulation
e t International Journal on Emerging Technologies (Special Issue on NCRIET-2015) 6(2): 188-192(2015) ISSN No. (Print) : 0975-8364 ISSN No. (Online) : 2249-3255 Comparison of MIMO OFDM System with BPSK
More informationPerformance Study of MIMO-OFDM System in Rayleigh Fading Channel with QO-STB Coding Technique
e-issn 2455 1392 Volume 2 Issue 6, June 2016 pp. 190 197 Scientific Journal Impact Factor : 3.468 http://www.ijcter.com Performance Study of MIMO-OFDM System in Rayleigh Fading Channel with QO-STB Coding
More informationBoosting Microwave Capacity Using Line-of-Sight MIMO
Boosting Microwave Capacity Using Line-of-Sight MIMO Introduction Demand for network capacity continues to escalate as mobile subscribers get accustomed to using more data-rich and video-oriented services
More informationField Experiments of 2.5 Gbit/s High-Speed Packet Transmission Using MIMO OFDM Broadband Packet Radio Access
NTT DoCoMo Technical Journal Vol. 8 No.1 Field Experiments of 2.5 Gbit/s High-Speed Packet Transmission Using MIMO OFDM Broadband Packet Radio Access Kenichi Higuchi and Hidekazu Taoka A maximum throughput
More informationVOL. 3, NO.11 Nov, 2012 ISSN Journal of Emerging Trends in Computing and Information Sciences CIS Journal. All rights reserved.
Effect of Fading Correlation on the Performance of Spatial Multiplexed MIMO systems with circular antennas M. A. Mangoud Department of Electrical and Electronics Engineering, University of Bahrain P. O.
More information5G Antenna Design & Network Planning
5G Antenna Design & Network Planning Challenges for 5G 5G Service and Scenario Requirements Massive growth in mobile data demand (1000x capacity) Higher data rates per user (10x) Massive growth of connected
More informationCHAPTER 3 MIMO-OFDM DETECTION
63 CHAPTER 3 MIMO-OFDM DETECTION 3.1 INTRODUCTION This chapter discusses various MIMO detection methods and their performance with CE errors. Based on the fact that the IEEE 80.11n channel models have
More informationFeedback Design for Multi-User MIMO Systems
Feedback Design for Multi-User MIMO Systems V. Jungnickel 1, L. Thiele 1, T. Wirth 1, M. Schellmann 1, T. austein 2, V. Venkatkumar 2 1 Fraunhofer Institute for Telecommunications einrich-ertz-institut,
More informationLong Term Evolution (LTE) and 5th Generation Mobile Networks (5G) CS-539 Mobile Networks and Computing
Long Term Evolution (LTE) and 5th Generation Mobile Networks (5G) Long Term Evolution (LTE) What is LTE? LTE is the next generation of Mobile broadband technology Data Rates up to 100Mbps Next level of
More informationTen Things You Should Know About MIMO
Ten Things You Should Know About MIMO 4G World 2009 presented by: David L. Barner www/agilent.com/find/4gworld Copyright 2009 Agilent Technologies, Inc. The Full Agenda Intro System Operation 1: Cellular
More informationOutline / Wireless Networks and Applications Lecture 7: Physical Layer OFDM. Frequency-Selective Radio Channel. How Do We Increase Rates?
Page 1 Outline 18-452/18-750 Wireless Networks and Applications Lecture 7: Physical Layer OFDM Peter Steenkiste Carnegie Mellon University RF introduction Modulation and multiplexing Channel capacity Antennas
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 informationBreezeACCESS VL. Beyond the Non Line of Sight
BreezeACCESS VL Beyond the Non Line of Sight July 2003 Introduction One of the key challenges of Access deployments is the coverage. Operators providing last mile Broadband Wireless Access (BWA) solution
More informationPerformance Evaluation of V-Blast Mimo System in Fading Diversity Using Matched Filter
Performance Evaluation of V-Blast Mimo System in Fading Diversity Using Matched Filter Priya Sharma 1, Prof. Vijay Prakash Singh 2 1 Deptt. of EC, B.E.R.I, BHOPAL 2 HOD, Deptt. of EC, B.E.R.I, BHOPAL Abstract--
More informationChallenges in Future Short Range Wireless Systems Abstract: Introduction
Challenges in Future Short Range Wireless Systems Gerhard Fettweis, Ernesto Zimmermann, TU Dresden Volker Jungnickel, Fraunhofer Heinrich-Hertz Institute for Telecommunications Eduard A. Jorswieck, Royal
More informationMIMO RFIC Test Architectures
MIMO RFIC Test Architectures Christopher D. Ziomek and Matthew T. Hunter ZTEC Instruments, Inc. Abstract This paper discusses the practical constraints of testing Radio Frequency Integrated Circuit (RFIC)
More informationCoordinated Multipoint Trials in the Downlink
Coordinated Multipoint Trials in the Downlink V. Jungnickel, L. Thiele, T. Wirth T. Haustein, S. Schiffermüller, A. Forck S. Wahls, S. Jaeckel, S. Schubert, H. Gäbler Fraunhofer Heinrich Hertz Institute
More informationDynamic Fair Channel Allocation for Wideband Systems
Outlines Introduction and Motivation Dynamic Fair Channel Allocation for Wideband Systems Department of Mobile Communications Eurecom Institute Sophia Antipolis 19/10/2006 Outline of Part I Outlines Introduction
More informationAll Beamforming Solutions Are Not Equal
White Paper All Beamforming Solutions Are Not Equal Executive Summary This white paper compares and contrasts the two major implementations of beamforming found in the market today: Switched array beamforming
More informationCHAPTER 8 MIMO. Xijun Wang
CHAPTER 8 MIMO Xijun Wang WEEKLY READING 1. Goldsmith, Wireless Communications, Chapters 10 2. Tse, Fundamentals of Wireless Communication, Chapter 7-10 2 MIMO 3 BENEFITS OF MIMO n Array gain The increase
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 informationMIMO I: Spatial Diversity
MIMO I: Spatial Diversity COS 463: Wireless Networks Lecture 16 Kyle Jamieson [Parts adapted from D. Halperin et al., T. Rappaport] What is MIMO, and why? Multiple-Input, Multiple-Output (MIMO) communications
More informationWireless Communication: Concepts, Techniques, and Models. Hongwei Zhang
Wireless Communication: Concepts, Techniques, and Models Hongwei Zhang http://www.cs.wayne.edu/~hzhang Outline Digital communication over radio channels Channel capacity MIMO: diversity and parallel channels
More informationNoise Plus Interference Power Estimation in Adaptive OFDM Systems
Noise Plus Interference Power Estimation in Adaptive OFDM Systems Tevfik Yücek and Hüseyin Arslan Department of Electrical Engineering, University of South Florida 4202 E. Fowler Avenue, ENB-118, Tampa,
More informationPERFORMANCE ANALYSIS OF MIMO-SPACE TIME BLOCK CODING WITH DIFFERENT MODULATION TECHNIQUES
SHUBHANGI CHAUDHARY AND A J PATIL: PERFORMANCE ANALYSIS OF MIMO-SPACE TIME BLOCK CODING WITH DIFFERENT MODULATION TECHNIQUES DOI: 10.21917/ijct.2012.0071 PERFORMANCE ANALYSIS OF MIMO-SPACE TIME BLOCK CODING
More informationAntenna Spacing in MIMO Indoor Channels
Antenna Spacing in MIMO Indoor Channels V. Pohl, V. Jungnickel, T. Haustein, C. von Helmolt Heinrich-Hertz-Institut für Nachrichtentechnik Berlin GmbH Einsteinufer 37, 1587 Berlin, Germany, e-mail: pohl@hhi.de
More informationChannel Modelling ETI 085. Antennas Multiple antenna systems. Antennas in real channels. Lecture no: Important antenna parameters
Channel Modelling ETI 085 Lecture no: 8 Antennas Multiple antenna systems Antennas in real channels One important aspect is how the channel and antenna interact The antenna pattern determines what the
More informationWiMAX Summit Testing Requirements for Successful WiMAX Deployments. Fanny Mlinarsky. 28-Feb-07
WiMAX Summit 2007 Testing Requirements for Successful WiMAX Deployments Fanny Mlinarsky 28-Feb-07 Municipal Multipath Environment www.octoscope.com 2 WiMAX IP-Based Architecture * * Commercial off-the-shelf
More information2. LITERATURE REVIEW
2. LITERATURE REVIEW In this section, a brief review of literature on Performance of Antenna Diversity Techniques, Alamouti Coding Scheme, WiMAX Broadband Wireless Access Technology, Mobile WiMAX Technology,
More informationPlanning of LTE Radio Networks in WinProp
Planning of LTE Radio Networks in WinProp AWE Communications GmbH Otto-Lilienthal-Str. 36 D-71034 Böblingen mail@awe-communications.com Issue Date Changes V1.0 Nov. 2010 First version of document V2.0
More informationMU-MIMO with Fixed Beamforming for
MU-MIMO with Fixed Beamforming for FDD Systems Manfred Litzenburger, Thorsten Wild, Michael Ohm Alcatel-Lucent R&I Stuttgart, Germany MU-MIMO - Motivation MU-MIMO Supporting multiple users in a cell on
More informationRF Considerations for Wireless Systems Design. Frank Jimenez Manager, Technical Support & Service
RF Considerations for Wireless Systems Design Frank Jimenez Manager, Technical Support & Service 1 The Presentation Objective We will cover.. The available wireless spectrum 802.11 technology and the wireless
More informationAntennas Multiple antenna systems
Channel Modelling ETIM10 Lecture no: 8 Antennas Multiple antenna systems Fredrik Tufvesson Department of Electrical and Information Technology Lund University, Sweden Fredrik.Tufvesson@eit.lth.se 2012-02-13
More informationAnalysis and Improvements of Linear Multi-user user MIMO Precoding Techniques
1 Analysis and Improvements of Linear Multi-user user MIMO Precoding Techniques Bin Song and Martin Haardt Outline 2 Multi-user user MIMO System (main topic in phase I and phase II) critical problem Downlink
More informationEvolution of Cellular Systems. Challenges for Broadband Wireless Systems. Convergence of Wireless, Computing and Internet is on the Way
International Technology Conference, 14~15 Jan. 2003, Hong Kong Technology Drivers for Tomorrow Challenges for Broadband Systems Fumiyuki Adachi Dept. of Electrical and Communications Engineering, Tohoku
More informationMobile Communications: Technology and QoS
Mobile Communications: Technology and QoS Course Overview! Marc Kuhn, Yahia Hassan kuhn@nari.ee.ethz.ch / hassan@nari.ee.ethz.ch Institut für Kommunikationstechnik (IKT) Wireless Communications Group ETH
More information2-2 Advanced Wireless Packet Cellular System using Multi User OFDM- SDMA/Inter-BTS Cooperation with 1.3 Gbit/s Downlink Capacity
2-2 Advanced Wireless Packet Cellular System using Multi User OFDM- SDMA/Inter-BTS Cooperation with 1.3 Gbit/s Downlink Capacity KAWAZAWA Toshio, INOUE Takashi, FUJISHIMA Kenzaburo, TAIRA Masanori, YOSHIDA
More information6 Uplink is from the mobile to the base station.
It is well known that by using the directional properties of adaptive arrays, the interference from multiple users operating on the same channel as the desired user in a time division multiple access (TDMA)
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 informationInterference management Within 3GPP LTE advanced
Interference management Within 3GPP LTE advanced Konstantinos Dimou, PhD Senior Research Engineer, Wireless Access Networks, Ericsson research konstantinos.dimou@ericsson.com 2013-02-20 Outline Introduction
More informationNOISE, INTERFERENCE, & DATA RATES
COMP 635: WIRELESS NETWORKS NOISE, INTERFERENCE, & DATA RATES Jasleen Kaur Fall 2015 1 Power Terminology db Power expressed relative to reference level (P 0 ) = 10 log 10 (P signal / P 0 ) J : Can conveniently
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 informationImproving Diversity Using Linear and Non-Linear Signal Detection techniques
International Journal of Engineering Research and Development e-issn: 2278-067X, p-issn: 2278-800X, www.ijerd.com Volume 10, Issue 6 (June 2014), PP.13-19 Improving Diversity Using Linear and Non-Linear
More informationPERFORMANCE ANALYSIS OF MIMO WIRELESS SYSTEM WITH ARRAY ANTENNA
PERFORMANCE ANALYSIS OF MIMO WIRELESS SYSTEM WITH ARRAY ANTENNA Mihir Narayan Mohanty MIEEE Department of Electronics and Communication Engineering, ITER, Siksha O Anusandhan University, Bhubaneswar, Odisha,
More informationWhy Time-Reversal for Future 5G Wireless?
Why Time-Reversal for Future 5G Wireless? K. J. Ray Liu Department of Electrical and Computer Engineering University of Maryland, College Park Acknowledgement: the Origin Wireless Team What is Time-Reversal?
More informationPerformance Analysis of Concatenated RS-CC Codes for WiMax System using QPSK
Performance Analysis of Concatenated RS-CC Codes for WiMax System using QPSK Department of Electronics Technology, GND University Amritsar, Punjab, India Abstract-In this paper we present a practical RS-CC
More informationPerformance analysis of MISO-OFDM & MIMO-OFDM Systems
Performance analysis of MISO-OFDM & MIMO-OFDM Systems Kavitha K V N #1, Abhishek Jaiswal *2, Sibaram Khara #3 1-2 School of Electronics Engineering, VIT University Vellore, Tamil Nadu, India 3 Galgotias
More informationMULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) The key to successful deployment in a dynamically varying non-line-of-sight environment
White Paper Wi4 Fixed: Point-to-Point Wireless Broadband Solutions MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) The key to successful deployment in a dynamically varying non-line-of-sight environment Contents
More informationLecture LTE (4G) -Technologies used in 4G and 5G. Spread Spectrum Communications
COMM 907: Spread Spectrum Communications Lecture 10 - LTE (4G) -Technologies used in 4G and 5G The Need for LTE Long Term Evolution (LTE) With the growth of mobile data and mobile users, it becomes essential
More informationCHAPTER 5 DIVERSITY. Xijun Wang
CHAPTER 5 DIVERSITY Xijun Wang WEEKLY READING 1. Goldsmith, Wireless Communications, Chapters 7 2. Tse, Fundamentals of Wireless Communication, Chapter 3 2 FADING HURTS THE RELIABILITY n The detection
More informationExam 3 is two weeks from today. Today s is the final lecture that will be included on the exam.
ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010 Lecture 19 Today: (1) Diversity Exam 3 is two weeks from today. Today s is the final lecture that will be included on the exam.
More informationCapacity Enhancement in WLAN using
319 CapacityEnhancementinWLANusingMIMO Capacity Enhancement in WLAN using MIMO K.Shamganth Engineering Department Ibra College of Technology Ibra, Sultanate of Oman shamkanth@ict.edu.om M.P.Reena Electronics
More informationMMSE Algorithm Based MIMO Transmission Scheme
MMSE Algorithm Based MIMO Transmission Scheme Rashmi Tiwari 1, Agya Mishra 2 12 Department of Electronics and Tele-Communication Engineering, Jabalpur Engineering College, Jabalpur, Madhya Pradesh, India
More informationMeasured propagation characteristics for very-large MIMO at 2.6 GHz
Measured propagation characteristics for very-large MIMO at 2.6 GHz Gao, Xiang; Tufvesson, Fredrik; Edfors, Ove; Rusek, Fredrik Published in: [Host publication title missing] Published: 2012-01-01 Link
More informationAdvanced Communication Systems -Wireless Communication Technology
Advanced Communication Systems -Wireless Communication Technology Dr. Junwei Lu The School of Microelectronic Engineering Faculty of Engineering and Information Technology Outline Introduction to Wireless
More informationPoint-to-Point Communications
Point-to-Point Communications Key Aspects of Communication Voice Mail Tones Alphabet Signals Air Paper Media Language English/Hindi English/Hindi Outline of Point-to-Point Communication 1. Signals basic
More informationDESIGN, IMPLEMENTATION AND OPTIMISATION OF 4X4 MIMO-OFDM TRANSMITTER FOR
DESIGN, IMPLEMENTATION AND OPTIMISATION OF 4X4 MIMO-OFDM TRANSMITTER FOR COMMUNICATION SYSTEMS Abstract M. Chethan Kumar, *Sanket Dessai Department of Computer Engineering, M.S. Ramaiah School of Advanced
More informationFrequency Reuse How Do I Maximize the Value of My Spectrum?
Frequency Reuse How Do I Maximize the Value of My Spectrum? Eric Wilson VP Systems Management, Vyyo Broadband Wireless Forum, February 20, 2001 Spectrum Reuse Outline Definition / concept Alternatives
More informationOFDM AS AN ACCESS TECHNIQUE FOR NEXT GENERATION NETWORK
OFDM AS AN ACCESS TECHNIQUE FOR NEXT GENERATION NETWORK Akshita Abrol Department of Electronics & Communication, GCET, Jammu, J&K, India ABSTRACT With the rapid growth of digital wireless communication
More informationWaveform Design Choices for Wideband HF
Waveform Design Choices for Wideband HF J. W. Nieto Harris Corporation RF Communications Division HFIA 2009, #1 Presentation Overview Motivation Waveforms Design Objectives Waveform Choices Summary HFIA
More informationCSC344 Wireless and Mobile Computing. Department of Computer Science COMSATS Institute of Information Technology
CSC344 Wireless and Mobile Computing Department of Computer Science COMSATS Institute of Information Technology Wireless Physical Layer Concepts Part III Noise Error Detection and Correction Hamming Code
More information802.11ax introduction and measurement solution
802.11ax introduction and measurement solution Agenda IEEE 802.11ax 802.11ax overview & market 802.11ax technique / specification 802.11ax test items Keysight Product / Solution Demo M9421A VXT for 802.11ax
More informationPerformance Comparison of MIMO Systems over AWGN and Rician Channels with Zero Forcing Receivers
Performance Comparison of MIMO Systems over AWGN and Rician Channels with Zero Forcing Receivers Navjot Kaur and Lavish Kansal Lovely Professional University, Phagwara, E-mails: er.navjot21@gmail.com,
More informationOne Cell Reuse OFDM/TDMA using. broadband wireless access systems
One Cell Reuse OFDM/TDMA using subcarrier level adaptive modulation for broadband wireless access systems Seiichi Sampei Department of Information and Communications Technology, Osaka University Outlines
More informationAn Improved Detection Technique For Receiver Oriented MIMO-OFDM Systems
9th International OFDM-Workshop 2004, Dresden 1 An Improved Detection Technique For Receiver Oriented MIMO-OFDM Systems Hrishikesh Venkataraman 1), Clemens Michalke 2), V.Sinha 1), and G.Fettweis 2) 1)
More informationPERFORMANCE ANALYSIS OF DOWNLINK MIMO IN 2X2 MOBILE WIMAX SYSTEM
PERFORMANCE ANALYSIS OF DOWNLINK MIMO IN 2X2 MOBILE WIMAX SYSTEM N.Prabakaran Research scholar, Department of ETCE, Sathyabama University, Rajiv Gandhi Road, Chennai, Tamilnadu 600119, India prabakar_kn@yahoo.co.in
More informationPage 1. Overview : Wireless Networks Lecture 9: OFDM, WiMAX, LTE
Overview 18-759: Wireless Networks Lecture 9: OFDM, WiMAX, LTE Dina Papagiannaki & Peter Steenkiste Departments of Computer Science and Electrical and Computer Engineering Spring Semester 2009 http://www.cs.cmu.edu/~prs/wireless09/
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 informationExperimental Analysis of MIMO-OFDM Eigenmode Transmission with MMSE Interference Canceller
Experimental Analysis of MIMO-OFDM Eigenmode Transmission with MMSE Interference Canceller Yuichi KAKISIMA Le ai Doan Ting See o Kei Sakaguchi Kiyomichi Araki Graduate School of Science and Engineering
More informationMultiple Access Techniques for Wireless Communications
Multiple Access Techniques for Wireless Communications Contents 1. Frequency Division Multiple Access (FDMA) 2. Time Division Multiple Access (TDMA) 3. Code Division Multiple Access (CDMA) 4. Space Division
More informationRealization of Peak Frequency Efficiency of 50 Bit/Second/Hz Using OFDM MIMO Multiplexing with MLD Based Signal Detection
Realization of Peak Frequency Efficiency of 50 Bit/Second/Hz Using OFDM MIMO Multiplexing with MLD Based Signal Detection Kenichi Higuchi (1) and Hidekazu Taoka (2) (1) Tokyo University of Science (2)
More informationPERFORMANCE ANALYSIS OF AN UPLINK MISO-CDMA SYSTEM USING MULTISTAGE MULTI-USER DETECTION SCHEME WITH V-BLAST SIGNAL DETECTION ALGORITHMS
PERFORMANCE ANALYSIS OF AN UPLINK MISO-CDMA SYSTEM USING MULTISTAGE MULTI-USER DETECTION SCHEME WITH V-BLAST SIGNAL DETECTION ALGORITHMS 1 G.VAIRAVEL, 2 K.R.SHANKAR KUMAR 1 Associate Professor, ECE Department,
More informationELEC-E7120 Wireless Systems Weekly Exercise Problems 5
ELEC-E7120 Wireless Systems Weekly Exercise Problems 5 Problem 1: (Range and rate in Wi-Fi) When a wireless station (STA) moves away from the Access Point (AP), the received signal strength decreases and
More information4G Technologies Myths and Realities
4G Technologies Myths and Realities Leonhard Korowajczuk CEO/CTO CelPlan International, Inc. www.celplan.com leonhard@celplan.com 1-703-259-4022 29 th CANTO - Aruba Caribbean Association of National Telecommunications
More informationMaximum-Likelihood Co-Channel Interference Cancellation with Power Control for Cellular OFDM Networks
Maximum-Likelihood Co-Channel Interference Cancellation with Power Control for Cellular OFDM Networks Manar Mohaisen and KyungHi Chang The Graduate School of Information Technology and Telecommunications
More informationChannel Estimation for Downlink LTE System Based on LAGRANGE Polynomial Interpolation
Channel Estimation for Downlink LTE System Based on LAGRANGE Polynomial Interpolation Mallouki Nasreddine,Nsiri Bechir,Walid Hakimiand Mahmoud Ammar University of Tunis El Manar, National Engineering School
More informationMassive MIMO a overview. Chandrasekaran CEWiT
Massive MIMO a overview Chandrasekaran CEWiT Outline Introduction Ways to Achieve higher spectral efficiency Massive MIMO basics Challenges and expectations from Massive MIMO Network MIMO features Summary
More informationmm Wave Communications J Klutto Milleth CEWiT
mm Wave Communications J Klutto Milleth CEWiT Technology Options for Future Identification of new spectrum LTE extendable up to 60 GHz mm Wave Communications Handling large bandwidths Full duplexing on
More informationReview on Improvement in WIMAX System
IJIRST International Journal for Innovative Research in Science & Technology Volume 3 Issue 09 February 2017 ISSN (online): 2349-6010 Review on Improvement in WIMAX System Bhajankaur S. Wassan PG Student
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 informationMerging Propagation Physics, Theory and Hardware in Wireless. Ada Poon
HKUST January 3, 2007 Merging Propagation Physics, Theory and Hardware in Wireless Ada Poon University of Illinois at Urbana-Champaign Outline Multiple-antenna (MIMO) channels Human body wireless channels
More information