Title :
Robust joint source-channel coding theory
Author :
Mittal, Udar ; Phamdo, Nam
Author_Institution :
Dept. of Electr. Eng., State Univ. of New York, Stony Brook, NY, USA
fDate :
29 Jun-4 Jul 1997
Abstract :
We consider joint source-channel coding for a memoryless Gaussian source and an additive white Gaussian noise (AWGN) channel. A code is said to be robust if its performance is arbitrarily close to the theoretical limit for a wide range of channel noise conditions. The existence of robust codes depends on the ratio of the channel bandwidth to the source bandwidth-a quantity we called ρ. We first show that when ρ=1, robust codes do indeed exist. Secondly, no robust code exists for ρ≠1
Keywords :
Gaussian channels; Gaussian processes; channel coding; memoryless systems; rate distortion theory; source coding; AWGN channel; Gaussian process; additive white Gaussian noise channel; channel bandwidth to source bandwidth ratio; channel noise conditions; joint source-channel coding; memoryless Gaussian source; performance; rate distortion function; robust codes; AWGN channels; Additive white noise; Bandwidth; Codes; Decoding; Gaussian noise; Gaussian processes; Noise robustness; Rate-distortion; Sampling methods;
Conference_Titel :
Information Theory. 1997. Proceedings., 1997 IEEE International Symposium on
Conference_Location :
Ulm
Print_ISBN :
0-7803-3956-8
DOI :
10.1109/ISIT.1997.613382
