On the Low-SNR Capacity of Phase-Shift Keying with Hard-Decision Detection

Abstract

The low-snr capacity of M-ary PSK transmission over both the additive white Gaussian noise (AWGN) and fading channels is analyzed when hard-decision detection is employed at the receiver. Closed-form expressions for the first and second derivatives of the capacity at zero snr are obtained. The spectral-efficiency/bit-energy tradeoff in the low-snr regime is analyzed by finding the wideband slope and the bit energy required at zero spectral efficiency. Practical design guidelines are drawn from the information-theoretic analysis. The fading channel analysis is conducted for both coherent and noncoherent cases, and the performance penalty in the low-power regime for not knowing the channel is identified.

To appear in the Proc. of the 2007 IEEE International Symposium on Information Theory

References in corpus (2)

• The Noncoherent Rician Fading Channel -- Part II : Spectral Efficiency in the Low-Power Regime
• How Good is Phase-Shift Keying for Peak-Limited Rayleigh Fading Channels in the Low-SNR Regime?

Cited by in corpus (3)

• Asymmetric Modulation Design for Wireless Information and Power Transfer with Nonlinear Energy Harvesting
• On the Capacity-Achieving Input of Channels with Phase Quantization
• Quantum communications in continuous variable systems