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Transmit Antenna Selection for Space–Time Line Code Systems
IEEE Transactions on Communications ( IF 8.3 ) Pub Date : 2020-11-09 , DOI: 10.1109/tcomm.2020.3036655
Seung-Chan Lim , Jingon Joung

In this study, we consider a space–time line code (STLC) system with $N$ transmit antennas and two receive antennas. Although the STLC system is scalable to an arbitrary number of transmit antennas, a large number of them will increase the hardware cost and complicate the implementation of the system. To resolve this practical limitation, we propose a transmit antenna selection (TAS) scheme for the $N$ -by-2 STLC system. If $S\leq N$ antennas are used for the transmission, the STLC transmitter selects the $S$ antennas such that the instantaneous signal-to-noise ratio (SNR) is maximized. For a comprehensive performance analysis, the instantaneous SNR of the proposed TAS is characterized in terms of the statistical mean and moment-generating function (MGF). To investigate the performance of the proposed TAS approach, the approximated expression of error rate is derived based on the MGF method. Moreover, using asymptotic analysis, we show that the proposed TAS-STLC system achieves full spatial diversity of $2N$ , while the coding gain is affected by $N$ , $S$ , and the modulation order. As a special case, we also provide a mathematical analysis of the error rate of the conventional STLC system when $N=S$ .

中文翻译:

时空编码系统的发射天线选择

在本研究中,我们考虑具有以下特征的时空代码(STLC)系统: $ N $ 发送天线和两个接收天线。尽管STLC系统可扩展到任意数量的发射天线,但是大量发射天线会增加硬件成本,并使系统的实现复杂化。为解决这一实际限制,我们提出了一种针对天线的发射天线选择(TAS)方案。 $ N $ -by-2 STLC系统。如果 $ S \ leq N $ 天线用于传输,STLC发射机选择 $ S $ 天线,使瞬时信噪比(SNR)最大化。为了进行全面的性能分析,建议的TAS的瞬时SNR以统计平均值和矩生成函数(MGF)为特征。为了研究所提出的TAS方法的性能,基于MGF方法导出了错误率的近似表达式。此外,使用渐近分析,我们表明,提出的TAS-STLC系统实现了空间的完全空间分集。 $ 2N $ ,而编码增益受 $ N $ $ S $ ,以及调制顺序。作为特殊情况,我们还提供了传统STLC系统在以下情况下的误码率的数学分析: $ N = S $
更新日期:2020-11-09
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