Filters








69 Hits in 6.2 sec

On the Outage Exponent of Fading Relay Channels with Partial Channel State Information

Tung T. Kim, Giuseppe Caire, Mikael Skoglund
2007 2007 IEEE Information Theory Workshop  
The problem of optimal dimension and power allocation to maximize the asymptotic outage exponent over a decodeand-forward fading relay channel with quantized channel state feedback (CSF) is studied.  ...  This linear growth of diversity with the number of feedback levels stands in sharp contrast to the exponential growth for multiantenna channels (fully cooperative transmitters).  ...  The following lemma characterizes the diversity exponent of such a SIMO channel with CSF for only one of the two channel gains.  ... 
doi:10.1109/itw.2007.4313146 fatcat:dbebddjfwjdmnenwplhmkpnomy

On Minimizing Symbol Error Rate Over Fading Channels with Low-Resolution Quantization [article]

Neil Irwin Bernardo, Jingge Zhu, Jamie Evans
2021 arXiv   pre-print
We analyze the symbol error probability (SEP) of M-ary pulse amplitude modulation (M-PAM) receivers equipped with optimal low-resolution quantizers.  ...  Using this simplification, an exact SEP expression for quantized M-PAM receivers is obtained when Nakagami-m fading channel is considered.  ...  In contrast to other works on communication systems equipped with low-resolution ADCs, the quantizer is designed based only on the statistics of the fading channel and does not need to adapt to small-scale  ... 
arXiv:2106.11524v1 fatcat:fzjvkq6jdnarrpbd2buze46eky

Achievable Rates with Imperfect Transmitter Side Information Using a Broadcast Transmission Strategy

Avi Steiner, Shlomo Shamai
2008 IEEE Transactions on Wireless Communications  
For a Rayleigh fading channel, numerical results here show that if the feedback word can be longer than one bit, the broadcasting gain becomes negligible, due to diminished channel uncertainty.  ...  We derive the optimal power allocation for the broadcast approach for the quantized feedback model.  ...  ACKNOWLEDGEMENTS The authors gratefully acknowledge constructive discussions with Ami Wiesel, and wish to thank the associate editor and the anonymous reviewers for their valuable comments, which have  ... 
doi:10.1109/twc.2008.060815 fatcat:svamndgd7besnlmipsesnmuawy

2020 Index IEEE Transactions on Wireless Communications Vol. 19

2020 IEEE Transactions on Wireless Communications  
., Machine Learning-Enabled LOS/NLOS Identification for MIMO Systems in Dynamic Environments; TWC June 2020 3643-3657 Huang, C., see Yang, M., TWC Sept. 2020 5860-5874 Huang, D., Tao, X., Jiang, C.,  ...  ., +, TWC March 2020 1563-1576 Prediction and Communication Co-Design for Ultra-Reliable and Low-Latency Communications.  ...  ., +, TWC Feb. 2020 1357-1372 Grid-Less Variational Bayesian Channel Estimation for Antenna Array Systems With Low Resolution ADCs.  ... 
doi:10.1109/twc.2020.3044507 fatcat:ie4rwz4dgvaqbaxf3idysubc54

Quantized Massive MU-MIMO-OFDM Uplink [article]

Christoph Studer, Giuseppe Durisi
2016 arXiv   pre-print
This paper investigates the uplink performance of a quantized massive MU-MIMO system that deploys orthogonal frequency-division multiplexing (OFDM) for wideband communication.  ...  The theoretical limits as well as practical transceiver algorithms for such quantized MU-MIMO systems operating over frequency-flat, narrowband channels have been studied extensively.  ...  To enable reliable communication over frequency-selective channels, we develop new methods for (optimal) channel estimation and data detection for the case when massive MU-MIMO is combined with orthogonal  ... 
arXiv:1509.07928v2 fatcat:u5eofvdr4jc45kkyiuwgr74otu

2019 Index IEEE Transactions on Communications Vol. 67

2019 IEEE Transactions on Communications  
Reliable OFDM Receiver With Ultra-Low Resolution ADC.  ...  ., +, TCOMM Sept. 2019 6311-6326 FALP: Fast Beam Alignment in mmWave Systems With Low-Resolution Phase Shifters.  ... 
doi:10.1109/tcomm.2019.2963622 fatcat:qd6so3reavde3eiukfknmpbfsu

A Survey on Channel Estimation and Practical Passive Beamforming Design for Intelligent Reflecting Surface Aided Wireless Communications [article]

Beixiong Zheng, Changsheng You, Weidong Mei, Rui Zhang
2022 arXiv   pre-print
under various practical hardware constraints.  ...  Intelligent reflecting surface (IRS) has emerged as a key enabling technology to realize smart and reconfigurable radio environment for wireless communications, by digitally controlling the signal reflection  ...  ; 3) Channel statistics/distribution refinement to achieve ultra-reliable communications by e.g., converting the Rayleigh/fast fading channels (in high mobility scenarios) into their Rician/slow fading  ... 
arXiv:2110.01292v3 fatcat:c47cn4a42zdhtetjinozjtqb6e

Massive MIMO Techniques for 5G and Beyond—Opportunities and Challenges

David Borges, Paulo Montezuma, Rui Dinis, Marko Beko
2021 Electronics  
Telecommunications have grown to be a pillar to a functional society and the urge for reliable and high throughput systems has become the main objective of researchers and engineers.  ...  The purpose of this article is to describe the most acknowledged transmission techniques for massive MIMO systems and to analyze some of the most promising ones and identify existing problems and limitations  ...  Low-resolution ADCs can be implemented with simpler circuits, consume less power, and at low SNR incur only a little rate loss compared to high-resolution quantization [61, 62] .  ... 
doi:10.3390/electronics10141667 fatcat:3qgwtcfctvesbhmktr3goxxk4y

Non-Coherent and Backscatter Communications: Enabling Ultra-Massive Connectivity in the Era Beyond 5G [article]

Syed Junaid Nawaz, Shree Krishna Sharma, Babar Mansoor, Mohmammad N. Patwary, Noor M. Khan
2020 arXiv   pre-print
Towards delivering the anticipated massive connectivity requirements with optimal energy and spectral efficiency besides low hardware cost, this paper proposes a framework that is fundamentally based on  ...  These challenges, partly emerged with the advent of massive machine-type communications (mMTC) services, require extensive research innovations to sustain the evolution towards enhanced-mMTC (e-mMTC) with  ...  In [126] , ambient BsC under Rayleigh fading channel conditions is studied for simultaneous energy harvesting and transmission.  ... 
arXiv:2005.10937v3 fatcat:nsyufug2dbbvzeribg4bgymyfa

Design and Implementation of a DSP-Based MIMO System Prototype for Real-Time Demonstration and Indoor Channel Measurements

Raqibul Mostafa, Ran Gozali, Ramesh Chembil Palat, Max Robert, William G. Newhall, Brian D. Woerner, Jeffrey H. Reed
2005 EURASIP Journal on Advances in Signal Processing  
Different components of the system are described in detail, including the software implementation, I/O schemes with custom hardware, and data transfer mechanisms between the DSP and the host PC.  ...  The testbed is a research tool for comparing practical and theoretical performance metrics (e.g., throughput, link reliability) in different wireless channel conditions.  ...  ACKNOWLEDGMENTS This work was supported by the MPRG Industrial Affiliates and the Navy Collaborative Integrated Information Technology Initiative (NAVCIITI) under Grant N00014-00-1-0549; this paper was  ... 
doi:10.1155/asp.2005.2673 fatcat:wtw6gp3bw5hwlhklwlz4uvx3ci

2021 Index IEEE Transactions on Wireless Communications Vol. 20

2021 IEEE Transactions on Wireless Communications  
The Author Index contains the primary entry for each item, listed under the first author's name.  ...  Note that the item title is found only under the primary entry in the Author Index.  ...  ., +, TWC Feb. 2021 983-996 Phase shifters Dynamic Hybrid Precoding Relying on Twin-Resolution Phase Shifters in Millimeter-Wave Communication Systems.  ... 
doi:10.1109/twc.2021.3135649 fatcat:bgd3vzb7pbee7jp75dnbucihmq

A Comparative Analysis of Spatial Multiplexing Techniques for Outdoor MIMO-OFDM Systems with a Limited Feedback Constraint

S. Savazzi, M. Nicoli, M. Sternad
2009 IEEE Transactions on Vehicular Technology  
The radio interface is adapted to fit the requirements for the adaptive modulation and coding with advanced antenna system (AMC-AAS) mode of the IEEE 802.16-2005 standard.  ...  Our study is focused on outdoor environments characterized by a moderate angular spread.  ...  case and [28] the correlated Rayleigh fading case).  ... 
doi:10.1109/tvt.2008.920474 fatcat:ye23yxqhwzbmdlcxdy4azeb7gm

Time-Reversal Division Multiple Access over Multi-Path Channels

Feng Han, Yu-Han Yang, Beibei Wang, Yongle Wu, K. J. Ray Liu
2012 IEEE Transactions on Communications  
candidate for future energy-efficient low-complexity broadband wireless communications.  ...  The system performance is investigated in terms of its effective signal-to-interference-plus-noise ratio (SINR), the achievable sum rate and the achievable rates with outage.  ...  consider a multi-user broadband communication system over multi-path Rayleigh fading channels, in which the signals of multiple users are separated solely by TRDMA. • We define and evaluate a number of  ... 
doi:10.1109/tcomm.2012.051012.110531 fatcat:liggr4lz4ze45i26yujs3k4muy

RF Impairments in Wireless Transceivers: Phase Noise, CFO, and IQ Imbalance – A Survey

Amirhossein Mohammadian, Chintha Tellambura
2021 IEEE Access  
Wireless transceivers for mass-market applications must be cost effective. We may achieve this goal by deploying non-ideal low-cost radio frequency (RF) analog components.  ...  However, their imperfections may result in RF impairments, including phase noise (PN), carrier frequency offset (CFO), and in-phase (I) and quadrature-phase (Q) imbalance.  ...  In [505] , the outage performance of the system with MRC detection over Rayleigh fading channels is analyzed.  ... 
doi:10.1109/access.2021.3101845 fatcat:ete2cakeerdjrahum3gcuuexwe

Spatial multiplexing for outdoor MIMO-OFDM systems with limited feedback costraint

S. Savazzi, M. Nicoli, M. Sternad
2006 2006 IEEE International Conference on Communications  
In this paper we propose a spatial multiplexing technique for the downlink of a multiple-input-multiple-output (MIMO) orthogonal-frequency-division-multiplexing (OFDM) system.  ...  For outdoor environments with a limited angular spread at the base station, the proposed technique is able to separate the users' streams through a joint spatial processing at both the transmitter and  ...  FDD is used to separate uplink and downlink communications. In the system under study multiple access is handled by a combination of time, frequency and space division.  ... 
doi:10.1109/icc.2006.254707 dblp:conf/icc/SavazziNS06 fatcat:ob6q2dl2hncdbfwlrj33agd5ou
« Previous Showing results 1 — 15 out of 69 results