Turbo-like codes for distributed joint source-channel coding of correlated senders in multiple access channels

We consider an AWGN multiple access channels in which two correlated senders transmit information to a common receiver. In order to reduce the required transmission power, each one of the senders is encoded independently using a concatenation of two LDGM codes. The joint decoder consists of two deco...

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Vydáno v:2003 37th Asilomar Conference on Signals, Systems and Computers Ročník 1; s. 840 - 844 Vol.1
Hlavní autoři: Zhong, W., Zhao, Y., Garcia-Frias, J.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 2003
Témata:
Additive white noise
AWGN
Channel coding
Collaborative work
Degradation
Gaussian noise
Government
Iterative decoding
Parity check codes
Turbo codes
ISBN:9780780381049, 0780381041
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Popis
Shrnutí:We consider an AWGN multiple access channels in which two correlated senders transmit information to a common receiver. In order to reduce the required transmission power, each one of the senders is encoded independently using a concatenation of two LDGM codes. The joint decoder consists of two decoders, which exchange extrinsic information to exploit the correlation between the senders. Different interleaving schemes are investigated and analyzed. The resulting performance is very close to the theoretical limits obtained when separation between source and channel coding is assumed. Little performance degradation is observed when the correlation parameter and the noise variance are unknown at the decoder site, since they can be estimated jointly with the decoding process.
ISBN:9780780381049
0780381041
DOI:10.1109/ACSSC.2003.1292031