Hybrid digital-analog coding with bandwidth compression for Gaussian source-channel pairs
IEEE Transactions on Communications
Approximating the Gaussian multiple description rate region under symmetric distortion constraints
IEEE Transactions on Information Theory
Approximate characterizations for the Gaussian broadcasting distortion region
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
Hybrid digital-analog joint source-channel coding for broadcasting correlated Gaussian sources
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
Joint Wyner-Ziv/dirty-paper coding by modulo-lattice modulation
IEEE Transactions on Information Theory
Distortion minimization in Gaussian layered broadcast coding with successive refinement
IEEE Transactions on Information Theory
Polynomial based analog source-channel codes
IEEE Transactions on Communications
Asymptotically optimal joint source-channel coding with minimal delay
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Communicating correlated Gaussian sources over Gaussian Z interference channels
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Wyner-Ziv coding over broadcast channels: digital schemes
IEEE Transactions on Information Theory
Generalizing capacity: new definitions and capacity theorems for composite channels
IEEE Transactions on Information Theory
SoftCast: clean-slate scalable wireless video
Proceedings of the 2010 ACM workshop on Wireless of the students, by the students, for the students
Joint source channel coding with side information using hybrid digital analog codes
IEEE Transactions on Information Theory
Hi-index | 755.20 |
We consider the problem of broadcasting a single Gaussian source to two listeners over a Gaussian broadcast channel, with rho channel uses per source sample, where rho>1. A distortion pair (D1 ,D2) is said to be achievable if one can simultaneously achieve a mean-squared error (MSE) D1 at receiver 1 and D2 at receiver 2. The main result of this correspondence is an outer bound for the set of all achievable distortion pairs. That is, we find necessary conditions under which (D1,D2) is achievable. We then apply this result to the problem of point-to-point transmission over a Gaussian channel with unknown signal-to-noise ratio (SNR) and rho>1. We show that if a system must be optimal at a certain SNRmin, then, asymptotically, the system distortion cannot decay faster than O(1/SNR). As for achievability, we show that a previously reported scheme, due to Mittal and Phamdo (2002), is optimal at high SNR. We introduce two new schemes for broadcasting with bandwidth expansion, combining digital and analog transmissions. We finally show how a system with a partial feedback, returning from the bad receiver to the transmitter and to the good receiver, achieves a distortion pair that lies on the outer bound derived here