We consider the transmission of a bivariate Gaussian memoryless source over a two-user additive Gaussian multiple-access channel with unidirectional conferencing. Here, prior to each transmission block Encoder 1 is allowed to communicate with Encoder 2 via a unidirectional noise-free bit-pipe of given capacity. We derive a necessary condition for the achievability of a distortion pair expressed as a function of the channel SNR and of the source correlation. In the high-SNR regime, and when the capacity of the conference channel is unlimited, the necessary condition is shown to agree with a sufficient condition derived previously by the authors. We evaluate the precise high-SNR asymptotics for a subset of distortion pairs when the conferencing capacity is unlimited in which case we show that the problem is separable.
|Title of host publication||Proceedings - 2015 IEEE International Symposium on Information Theory, ISIT 2015|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Number of pages||5|
|State||Published - 28 Sep 2015|
|Event||IEEE International Symposium on Information Theory, ISIT 2015 - Hong Kong, Hong Kong|
Duration: 14 Jun 2015 → 19 Jun 2015
|Name||IEEE International Symposium on Information Theory - Proceedings|
|Conference||IEEE International Symposium on Information Theory, ISIT 2015|
|Period||14/06/15 → 19/06/15|
Bibliographical noteFunding Information:
The work of S. Bross was supported by the Israel Science Foundation under Grant 497/09 and Grant 455/14.
© 2015 IEEE.