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A technique to improve MMSE performance of PACE in time-selective Rayleigh fading channels

机译:在时间选择瑞利衰落信道中提高PACE MMSE性能的技术

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The so-called peaky signaling has been shown to improve the performance of a communication system over noncoherent fading channels in the low signal-to-noise ratio (SNR) regime. We consider a signaling scheme which is equivalent to peaky signaling over a time-selective Rayleigh fading channel and make use of the unused degrees of freedom to improve the minimum mean square error (MMSE) performance of pilot-aided channel estimation (PACE) by a processing technique incorporating low pass filtering and downsampling. We assume infinite pilot symbols and optimal Wiener smoother at the receiver and give some analytical as well numerical results suggesting significant gains in MMSE performance of PACE.
机译:已经显示出所谓的峰值信令可以在低信噪比(SNR)的情况下改善非相干衰落信道上通信系统的性能。我们考虑一种等效于在时间选择瑞利衰落信道上的峰值信令的信令方案,并利用未使用的自由度来提高导频辅助信道估计(PACE)的最小均方误差(MMSE)性能,包含低通滤波和下采样的处理技术。我们假设接收器处有无限的导频符号和最佳的维纳平滑器,并给出一些分析以及数值结果,表明PACE的MMSE性能有了显着提高。

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