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Improved Spatial Modulation For High Spectral Efficiency

机译:改进的空间调制可实现高光谱效率

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Spatial Modulation (SM) is a technique that can enhance the capacity of MIMO schemes by exploiting the index of transmit antenna to convey information bits. In this paper, we describe this technique, and present a new MIMO transmission scheme that combines SM and spatial multiplexing. In the basic form of SM, only one out of MT available antennas is selected for transmission in any given symbol interval. We propose to use more than one antenna to transmit several symbols simultaneously. This would increase the spectral efficiency. At the receiver, an optimal detector is employed to jointly estimate the transmitted symbols as well as the index of the active transmit antennas. In this paper we evaluate the performance of this scheme in an uncorrelated Rayleigh fading channel. The simulations results show that the proposed scheme outperforms the optimal SM and V-BLAST (Vertical Bell Laboratories Layered space-time at high signal-to-noise ratio (SNR). For example, if we seek a spectral efficiency of 8 bits/s/Hz at bit error rate (BER) of 10-5 , the proposed scheme provides 5dB and 7dB improvements over SM and V-BLAST, respectively
机译:空间调制(SM)是一种可以通过利用发射天线的索引来传达信息比特来增强MIMO方案容量的技术。在本文中,我们描述了该技术,并提出了一种结合了SM和空间复用的新MIMO传输方案。在SM的基本形式中,仅选择MT个可用天线中的一个来在任何给定的符号间隔中进行传输。我们建议使用不止一个天线同时发送多个符号。这将增加频谱效率。在接收机处,采用最佳检测器来联合估计发射符号以及有效发射天线的索引。在本文中,我们评估了该方案在不相关瑞利衰落信道中的性能。仿真结果表明,该方案在高信噪比(SNR)下优于最优的SM和V-BLAST(垂直贝尔实验室分层时空),例如,如果我们寻求8 bit / s的频谱效率/ Hz,误码率(BER)为10-5时,与SM和V-BLAST相比,建议的方案分别提供了5dB和7dB的改进

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