TY - GEN
T1 - The posterior matching feedback scheme for joint source-channel coding with bandwidth expansion
AU - Shayevitz, Ofer
AU - Feder, Meir
PY - 2009
Y1 - 2009
N2 - When transmitting a Gaussian source over an AWGN channel with an input power constraint and a quadratic distortion measure, it is well known that optimal performance can be obtained using an analog joint source-channel scalar scheme which merely scales the input and output signals. In the case of bandwidth expansion, such a joint source-channel analog scheme attaining optimal performance is no longer simple. However, when feedback is available a simple and sequential analog linear procedure based on the Schalkwijk-Kailath scheme for communication, is optimal. Recently, we have introduced a fundamental feedback communication scheme, termed posterior matching, which generalizes the Schalkwijk-Kailath scheme to arbitrary memoryless channels and input distributions. In this paper, we show how the posterior matching scheme can be adapted to the joint source-channel coding setting with bandwidth expansion and a general distortion measure, when feedback is available.
AB - When transmitting a Gaussian source over an AWGN channel with an input power constraint and a quadratic distortion measure, it is well known that optimal performance can be obtained using an analog joint source-channel scalar scheme which merely scales the input and output signals. In the case of bandwidth expansion, such a joint source-channel analog scheme attaining optimal performance is no longer simple. However, when feedback is available a simple and sequential analog linear procedure based on the Schalkwijk-Kailath scheme for communication, is optimal. Recently, we have introduced a fundamental feedback communication scheme, termed posterior matching, which generalizes the Schalkwijk-Kailath scheme to arbitrary memoryless channels and input distributions. In this paper, we show how the posterior matching scheme can be adapted to the joint source-channel coding setting with bandwidth expansion and a general distortion measure, when feedback is available.
UR - http://www.scopus.com/inward/record.url?scp=67650680270&partnerID=8YFLogxK
U2 - 10.1109/DCC.2009.79
DO - 10.1109/DCC.2009.79
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AN - SCOPUS:67650680270
SN - 9780769535920
T3 - Proceedings - 2009 Data Compression Conference, DCC 2009
SP - 83
EP - 92
BT - Proceedings - 2009 Data Compression Conference, DCC 2009
T2 - 2009 Data Compression Conference, DCC 2009
Y2 - 16 March 2009 through 18 March 2009
ER -