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

  title={Is Phase Shift Keying Optimal for Channels with Phase-Quantized Output?},
  author={Neil Irwin Bernardo and Jingge Zhu and Jamie S. Evans},
  journal={2021 IEEE International Symposium on Information Theory (ISIT)},
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… 

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