Spatially Modulated Code-Division Multiple-Access for High-Connectivity Multiple Access

被引:4
|
作者
Pan, Peng [1 ]
Yang, Lie-Liang [2 ]
机构
[1] Hangzhou Dianzi Univ, Sch Commun Engn, Hangzhou, Zhejiang, Peoples R China
[2] Univ Southampton, Sch Elect & Comp Sci, Southampton SO17 1BJ, Hants, England
基金
英国工程与自然科学研究理事会;
关键词
MIMO; spatial modulation; CDMA; space shift keying; multiuser detection; interference cancellation; performance analysis; DS-CDMA; MULTIUSER DETECTION; CHANNEL ESTIMATION; SIGNAL-DETECTION; MIMO; SYSTEMS; TRANSMISSION; PERFORMANCE; ERROR; PROBABILITY;
D O I
10.1109/TWC.2019.2920644
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In order to take the advantages of spatial modulation (SM) and support the multiple-access (MA) communications requiring high connectivity, we integrate the SM with DS-CDMA to propose a SM/DS-CDMA scheme, which is in favor of attaining both antenna diversity and frequency diversity. Associated with the SM/DS-CDMA scheme, a range of linear and nonlinear multiuser detectors (MUDs) are proposed and studied. Specifically, for linear MUDs, both minimum mean-square-error-aided joint spatial demodulation (MMSE-JSD) and MMSE-aided separate spatial demodulation (MMSE-SSD) are introduced. For nonlinear MUDS, we first present the joint maximum-likelihood MUD (JML-MUD) for demonstrating the potential of the SM-/DS-CDMA systems. Then, the MMSE-relied iterative interference cancellation (MMSE-IIC) is suggested, and the associated two types of low-complexity high-efficiency reliability measurement schemes are proposed. In this paper, we mathematically analyze both the single-user average bit error rate (ABER) of the SM/DS-CDMA systems employing joint spatial demodulation (JSD) and the approximate ABER of the SM/DS-CDMA systems employing the MMSE-JSD. We investigate and compare the ABER performance of the SM/DS-CDMA systems with various detection schemes and also with some legacy schemes. Our studies and performance results show that the SM/DS-CDMA systems in conjunction with appropriate MUD schemes are capable of providing a desirable tradeoff among the number of users supportable, implementation complexity, and the ABER performance.
引用
收藏
页码:4031 / 4046
页数:16
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