On Real-Time Communication Systems with Noisy Feedback

Details On Real-Time Communication Systems with Noisy Feedback On Real-Time Communication Systems with Noisy Feedback

2007-09-23

arxiv.org/abs/0709.3753v1

Computer Science

Information Theory

5 pages, 2 figures, submitted to IEEE Information Theory Workshop

Scientific paper

We consider a real-time communication system with noisy feedback consisting of a Markov source, a forward and a backward discrete memoryless channels, and a receiver with finite memory. The objective is to design an optimal communication strategy (that is, encoding, decoding, and memory update strategies) to minimize the total expected distortion over a finite horizon. We present a sequential decomposition for the problem, which results in a set of nested optimality equations to determine optimal communication strategies. This provides a systematic methodology to determine globally optimal joint source-channel encoding and decoding strategies for real-time communication systems with noisy feedback.

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