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Published June 2017 | Submitted
Journal Article Open

Joint Source-Channel Coding With Feedback

Abstract

This paper quantifies the fundamental limits of variable-length transmission of a general (possibly analog) source over a memoryless channel with noiseless feedback, under a distortion constraint. We consider excess distortion, average distortion and guaranteed distortion (d-semifaithful codes). In contrast to the asymptotic fundamental limit, a general conclusion is that allowing variable-length codes and feedback leads to a sizable improvement in the fundamental delay-distortion tradeoff. In addition, we investigate the minimum energy required to reproduce k source samples with a given fidelity after transmission over a memoryless Gaussian channel, and we show that the required minimum energy is reduced with feedback and an average (rather than maximal) power constraint.

Additional Information

© 2017 IEEE. This work was supported in part by the National Science Foundation (NSF) under Grant CCF-1016625, by the NSF CAREER award under Grant CCF-1253205, and by the Center for Science of Information (CSoI), an NSF Science and Technology Center, under Grant CCF-0939370.

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Created:
August 19, 2023
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October 25, 2023