Joint source-channel coding with feedback (extended)

نویسندگان

  • Victoria Kostina
  • Yury Polyanskiy
  • Sergio Verdú
چکیده

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.

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عنوان ژورنال:
  • CoRR

دوره abs/1501.07640  شماره 

صفحات  -

تاریخ انتشار 2015