Partial decode-forward for quantum relay channels

Abstract

A relay channel is one in which a Source and Destination use an intermediate Relay station in order to improve communication rates. We propose the study of relay channels with classical inputs and quantum outputs and prove that a "partial decode and forward" strategy is achievable. We divide the channel uses into many blocks and build codes in a randomized, block-Markov manner within each block. The Relay performs a standard Holevo-Schumacher-Westmoreland quantum measurement on each block in order to decode part of the Source's message and then forwards this partial message in the next block. The Destination performs a novel "sliding-window" quantum measurement on two adjacent blocks in order to decode the Source's message. This strategy achieves non-trivial rates for classical communication over a quantum relay channel.

7 pages, submission to the 2012 International Symposium on Information Theory (ISIT 2012), Boston, MA, USA

References in corpus (3)

• Coding Theorem and Strong Converse for Quantum Channels
• Achieving the Han-Kobayashi inner bound for the quantum interference channel by sequential decoding
• Partial decode-forward for quantum relay channels

Cited by in corpus (8)

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• Partial decode-forward for quantum relay channels
• Quantum Subdivision Capacities and Continuous-time Quantum Coding
• A Quantum Multiparty Packing Lemma and the Relay Channel
• Network information theory for classical-quantum channels
• Broadcast Classical-Quantum Capacity Region of Two-Phase Bidirectional Relaying Channel
• Joint source-channel coding for a quantum multiple access channel
• The Quantum Multiple-Access Channel with Cribbing Encoders