Greedy receiver for photon-efficient optical communication

Abstract

In optical communication the transmitter encodes information into a set of light states defined by the modulation format, selected to accommodate specific channel conditions and to remain sufficiently distinguishable at the output. Various receiver architectures have been designed to improve the demodulation performance, ultimately limited by quantum theory. In this work I introduce a new receiver based on a locally optimal greedy algorithm and apply it to pulse position modulation. The receiver reduces the error probabilities of previously proposed strategies in all signal strength regimes and achieves results comparable with those obtained by numerical optimization of the detection process. In contrast, however, it is conceptually simple and therefore can be scaled to arbitrarily high modulation orders for which numerical methods become intractable. In the photon-starved regime characteristic of deep space optical communication, the greedy receiver approaches the quantum-optimal Helstrom bound on state discrimination error probability. In the regime of few-photon pulses, the error reduction offered over the other methods grows up to an order of magnitude.

arXiv comment10 pages, 5 figures. Comments more than welcome!

References in corpus (18)

• Classical capacity of the lossy bosonic channel: the exact solution
• Ultimate communication capacity of quantum optical channels by solving the Gaussian minimum-entropy conjecture
• Structured optical receivers to attain superadditive capacity and the Holevo limit
• Quantum channels showing superadditivity in capacity
• Optical codeword demodulation with error rates below standard quantum limit using a conditional nulling receiver
• Quantum Limits in Optical Communications
• PPM demodulation: On approaching fundamental limits of optical communications
• Real-time calibration of coherent-state receivers: learning by trial and error
• Incoherent on-off keying with classical and non-classical light
• Squeezing-enhanced communication without a phase reference
• Quantum Receiver Enhanced by Adaptive Learning
• Photon information efficiency limits in deep-space optical communications
• Range Dependence of an Optical Pulse Position Modulation Link in the Presence of Background Noise
• Approaching the ultimate capacity limit in deep-space optical communication
• Toward Photon-Efficient Key Distribution over Optical Channels
• Adaptive Discrimination Scheme for Quantum Pulse Position Modulation Signals
• Capacity of a lossy photon channel with direct detection
• Optimizing deep-space optical communication under power constraints