非线性对多天线OFDM收发器的影响

T. Schenk, Peter F. M. Smulders, E. Fledderus
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引用次数: 14

摘要

本文研究了多天线OFDM系统中非线性对发射机(TX)和接收机(RX)性能的影响。首先,不同的,以前提出的,非线性模型进行了审查,并表明其等价性。在此基础上,推导了多输入多输出OFDM系统在瑞利衰落信道下的误差概率解析表达式,与仿真结果吻合较好。从结果中可以得出结论,对于高信噪比值,TX非线性会导致性能下降,这与MIMO配置无关。然而,对于RX非线性,在这个高信噪比区域的性能确实取决于MIMO配置。该结果可用于推导MIMO OFDM系统中允许的非线性的极限
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impact of nonlinearities in multiple-antenna OFDM transceivers
This paper investigates the performance impact of nonlinearities in the transmitter (TX) as well as the receiver (RX) of multiple-antenna OFDM systems. First different, previously proposed, nonlinearity models are reviewed and their equivalence is shown. Subsequently, analytical expressions are derived for the probability of error of multiple-input multiple-output (MIMO) OFDM systems in Rayleigh-faded channels, which show good agreement with results from a simulation study. It can be concluded from the results that for high SNR values the TX nonlinearities cause performance floors, which are independent of the MIMO configuration. For RX nonlinearities, however, the performance in this high SNR region does depend on the MIMO configuration. The results can be used to derive limits for the permissible nonlinearities in MIMO OFDM systems
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