Title :
Iterative joint synchronisation and turbo-decoding
Author :
Burr, Alister G. ; Zhang, Li
Author_Institution :
Dept. of Electron., York Univ., UK
Abstract :
We consider the problem of synchronisation (i.e. carrier phase and symbol timing recovery) and decoding in coded systems, especially turbo-coded systems. We introduce a new concept "a-priori probability aided estimation", where the log-likelihood ratio obtained from a MAP decoder (as used in turbo-decoding) is used to aid estimation in an iterative synchroniser/decoder. We illustrate this in detail with reference to carrier recovery in a turbo-coded BPSK system, and demonstrate a substantial performance advantage over conventional separate synchronisation and decoding.
Keywords :
iterative decoding; phase estimation; phase shift keying; synchronisation; turbo codes; BPSK system; MAP decoder; a priori probability aided estimation; carrier phase recovery; iterative synchroniser/decoder; log-likelihood ratio; symbol timing recovery; synchronisation; turbo-decoding; Binary phase shift keying; Error correction; Fourier series; Iterative decoding; Phase estimation; Quadrature phase shift keying; Redundancy; Signal to noise ratio; Timing; Turbo codes;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023686
