Phase noise in collective binary phase shift keying with Hadamard words

Abstract

We analyze the effect of phase fluctuations in an optical communication scheme based on collective detection of sequences of binary coherent state symbols using linear optics and photon counting. When the phase noise is absent, the scheme offers qualitatively improved nonlinear scaling of the spectral efficiency with the mean photon number in the low-power regime compared to individual detection. We show that this feature, providing a demonstration of superaddivitity of accessible information in classical communication over quantum channels, is preserved if random phases imprinted on transmitted symbols fluctuate around a reference fixed over the sequence length.

6 pages, 2 figures

References in corpus (3)

• QPSK coherent state discrimination via a hybrid receiver
• Incoherent on-off keying with classical and non-classical light
• Toward Photon-Efficient Key Distribution over Optical Channels

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• Phase noise mitigation by a realistic optical parametric oscillator
• A robust hybrid receiver for binary phase-shift keying discrimination in the presence of phase noise
• Optimizing deep-space optical communication under power constraints