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transmit correlation effect on SIC-ZF receiver for V-BLAST system

Science in China(Series F) 2009年第12期52卷 2290-2295页

作者： GUO HaiYou ZHOU ZhiGang HU HongLin Key Laboratory of Wireless Sensor Network & Communication Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China Shanghai Research Center for Wireless Communications Shanghai 200335 China

It has been shown that transmit correlation causes a signal-to-noise ratio （SNR） loss in the zero forcing （ZF） receiver for V-BLAST （Vertical Bell LAbs LAyered Space-Time） system. In this paper, we investigate the transmit correlation effect on the ZF receiver with successive interference cancellation （SIC）. We show that such an unfavorable condition leads to twofold effects on the performance degradation. In addition to the immediate SNR loss, the transmit correlation can increase the propagation factor to spread decision error significantly. These two effects are evaluated analytically. We derive the probability density function （pdf） of the effective SNR at each decoded stream, and hence accurately quantify the SNR loss. We also calculate the decision error propagation factor in terms of its second moment. In particular, we show that transmit correlation can cause a stable component of error propagation which does not decline during the SIC procedure. Finally, we conduct the simulation to verify the analytical results.

关键词： error propagation (EP) successive interference cancellation (SIC) transmit correlation V-BLAST zero forcing (ZF)

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Throughput-based mode switching for MIMO ARQ systems in presence of transmit correlation

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Journal of Systems Engineering and Electronics 2013年第1期24卷 1-10页

作者： Zhengyu Zhang Ling Qiu Department of Electronic Engineering and Information Science University of Science and Technology of China

The mode switching between spatial multiplexing （SM） and space-time block code （STBC） diversity is investigated for the multiple-input multiple-output （MIMO） automatic repeat request （ARQ） system. Five important practical factors are considered in the proposed switching scheme： transmit correlation, ARQ technique, packet loss probability （PLP） constraint, discrete rate transmission （DRT） and channel coding. Under the spatially correlated channel, the distributions of the post signal-to-interference-plus- noise ratio （SiNR） for the SM mode and the STBC mode are obtained by using Gamma approximations. Then this paper derives the closed-form expressions of the PLP and the throughput for different modes when the ARQ technique is employed, based on which the mode switching algorithm is proposed to improve the spectral efficency. In the simulation, the correction of the expressions is first verified. Then, the significant gain observed by the proposed algorithm is presented. Since the switching point is the key parameter to implement the mode switching, this paper also shows how the switching point is affected by the practical factors considered.

关键词： multiple-input multiple-output (MIMO) mode switch-ing transmit correlation automatic repeat request (ARQ) through-put.

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维普期刊数据库

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Performance Analysis of Uplink Massive Spatial Modulation MIMO Systems in transmit-Correlated Rayleigh Channels

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China Communications 2021年第2期18卷 27-39页

作者： Qiyishu Li Xiangbin Yu Mingfeng Xie Ning Li Xiaoyu Dang College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016

In this paper,the performance of uplink multiuser massive multiple-input multipleoutput(MIMO)system with spatial modulation over transmit-correlated Rayleigh fading channel is investigated,where a large number of antennas are deployed at the base station and linear zero-forcing(ZF)receiver is employed for *** taking the transmit correlation and the randomness of shadow fading in to account,the bit error rate(BER)performance of the system is *** to the performance analysis,an approximated expression of overall average BER of the system is ***,asymptotic performance is studied and the corresponding BER expression at high signal-to-noise ratio is *** this basis,the diversity gain of the system can be obtained for performance *** results show that the derived theoretical expressions match the simulated values well,which verifies the correctness of our analysis.

关键词： bit error rate massive MIMO spatial modulation transmit correlation shadow fading ZF receiver

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