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arXiv 2101.09896cs.ITeess.SPmath.IT
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相移键控对于相位量化输出的信道是最佳的吗?

Is Phase Shift Keying Optimal for Channels with Phase-Quantized Output?

Neil Irwin Bernardo, Jingge Zhu, Jamie Evans

摘要:

本文建立了相位量化输出加性高斯白噪声(AWGN)信道的容量。我们表明,旋转的$2^b$相移键控方案是容量实现的输入分布与$b$位相位量化的复杂AWGN信道。然后使用该结果来建立作为平均功率约束$P$和量化比特$b$的函数的信道容量的表达式。在瑞利衰落的情况下,当信道状态信息(CSI)仅在接收端已知时,研究了相位量化系统的中断性能。我们的研究结果表明,存在一个阈值的速率$R$,超过该中断指数的中断概率突然改变。事实上,中断指数中的这种阈值效应导致$2^b$ -PSK在高SNR下具有次优中断性能。

英文摘要:

This paper establishes the capacity of additive white Gaussian noise (AWGN) channels with phase-quantized output. We show that a rotated $2^b$-phase shift keying scheme is the capacity-achieving input distribution for a complex AWGN channel with $b$-bit phase quantization. The result is then used to establish the expression for the channel capacity as a function of average power constraint $P$ and quantization bits $b$. The outage performance of phase-quantized system is also investigated for the case of Rayleigh fading when the channel state information (CSI) is only known at the receiver. Our findings suggest the existence of a threshold in the rate $R$, above which the outage exponent of the outage probability changes abruptly. In fact, this threshold effect in the outage exponent causes $2^b$-PSK to have suboptimal outage performance at high SNR.

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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