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arXiv cs/0508121cs.ITmath.IT
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相移键控在低信噪比条件下对峰值受限瑞利衰落信道的性能有多好?

How Good is Phase-Shift Keying for Peak-Limited Rayleigh Fading Channels in the Low-SNR Regime?

Wenyi Zhang, J. Nicholas Laneman

摘要:

研究了在无信道状态信息(CSI)的频率非选择性瑞利衰落信道中,相移键控(PSK)的可达信息速率。衰落过程具有一般的时间相关性,其特征在于其谱密度函数。我们考虑离散时间和连续时间的信道,并找到它们的渐近在低信号噪声比(SNR)。与已知的峰值约束下的容量上限相比,这些渐近性通常导致在低SNR制度的慢时变衰落信道的速率损失可以忽略不计。我们进一步专注于高斯-马尔可夫和克拉克衰落模型的案例研究。

英文摘要:

This paper investigates the achievable information rate of phase-shift keying (PSK) over frequency non-selective Rayleigh fading channels without channel state information (CSI). The fading process exhibits general temporal correlation characterized by its spectral density function. We consider both discrete-time and continuous-time channels, and find their asymptotics at low signal-to-noise ratio (SNR). Compared to known capacity upper bounds under peak constraints, these asymptotics usually lead to negligible rate loss in the low-SNR regime for slowly time-varying fading channels. We further specialize to case studies of Gauss-Markov and Clarke's fading models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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