Joint Source-Channel Coding With Feedback

被引：27
作者：
Kostina, Victoria [1 ]
Polyanskiy, Yury [2 ]
Verdu, Sergio [3 ]
机构：
[1] CALTECH, Pasadena, CA 91125 USA
[2] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[3] Princeton Univ, Princeton, NJ 08544 USA
来源：
IEEE TRANSACTIONS ON INFORMATION THEORY | 2017年 / 63卷 / 06期
基金：
美国国家科学基金会;
关键词：
Variable-length coding; joint source-channel coding; lossy compression; single-shot method; finite-blocklength regime; rate-distortion theory; feedback; memoryless channels; energy-distortion tradeoff; TRANSMISSION; DISTORTION; ENTROPY; ENERGY;
D O I：
10.1109/TIT.2017.2674667
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
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.
引用
收藏
页码：3502 / 3515
页数：14
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