时间和频率选择性瑞利衰落信道OFDM的低复杂度ICI抑制

Xiaodong Cai, G. Giannakis
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引用次数: 65

摘要

虽然衰落信道的快速变化会导致OFDM中的载波间干扰(ICI),从而大大降低其性能,但它们也引入了时间分集,可以利用该分集来提高性能。我们首先推导了双选择性瑞利衰落信道上OFDM传输的匹配滤波器边界(MFB),它在完全取消ICI而不增强噪声的情况下测试了可能的最佳性能。然后,我们开发了用于抑制ICI的低复杂度MMSE和DFE接收器。仿真结果表明,该DFE接收机能够以可承受的复杂度收集到ici损伤OFDM的显著增益。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Low-complexity ICI suppression for OFDM over time- and frequency-selective Rayleigh fading channels
While rapid variations of the fading channel cause intercarrier interference (ICI) in OFDM, thereby degrading its performance considerably, they also introduce temporal diversity, which can be exploited to improve the performance. We first derive a matched filter bound (MFB) for OFDM transmissions over doubly-selective Rayleigh fading channels, which benchmarks the best possible performance if ICI is completely cancelled without noise enhancement. We then develop low-complexity MMSE and DFE receivers for ICI suppression. Simulations show that the DFE receiver can collect significant gains of ICI-impaired OFDM with affordable complexity.
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