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Correlation reduction precoding for joint decoding in overloaded MIMO-OFDM system on Rician channel

机译:Rician信道上过载MIMO-OFDM系统中联合解码的相关约简预编码

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This paper presents a correlation reduction precoding scheme for joint decoding in an overloaded multiple input multiple output (MIMO)- orthogonal frequency division multiplexing (OFDM) system. In the overloaded MIMO system, the number of receive antenna elements is less than that of transmit antenna elements. Through joint maximum likelihood (ML) decoding a frequency diversity suppresses the BER degradation owing to the spatial multiplexing of signal streams. On a Rician channel, the correlation among the coded symbols deteriorates the performance of the joint ML decoding. Thus, this paper proposes the precoding scheme that reduces the correlation on the Rician channel. Numerical results obtained through computer simulation show that the proposed scheme improves the BER by a factor of 1/10 on the Rician channel with the Rician factor of 10.
机译:本文提出了一种在多输入多输出(MIMO)-正交频分复用(OFDM)系统过载的情况下用于联合解码的相关性降低预编码方案。在过载的MIMO系统中,接收天线元件的数量小于发射天线元件的数量。通过联合最大似然(ML)解码,由于信号流的空间复用,频率分集​​抑制了BER下降。在Rician信道上,编码符号之间的相关性使联合ML解码的性能恶化。因此,本文提出了一种减少Rician信道上相关性的预编码方案。通过计算机仿真得到的数值结果表明,该方案在Rician信道上将BER提高了1/10,Rician因子为10。

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