A new transmitter concept for iteratively-decoded source-channel coding schemes
2007 (English)In: 2007 IEEE 8TH WORKSHOP ON SIGNAL PROCESSING ADVANCES IN WIRELESS COMMUNICATIONS, NEW YORK: IEEE , 2007, 480-484 p.Conference paper (Refereed)
We address the optimization of joint source-channel coding schemes for iterative source-channel decoding (ISCD) of first-order Markov sources. The optimization requires source encoders, providing code words with a minimum Hamming distance d(min) >= 2. Usually, specifically designed variable-length codes (VLCs) are applied for this purpose, leading, however, to an increased complexity of the decoder. In this paper, we propose a novel concept: a single parity-check code is employed for mapping the quantized source symbols to a binary representation. The additional redundancy introduced by this mapping is afterwards compensated by an inner channel code with rate R > 1. Simulation results for the AWGN channel show that the proposed scheme is superior to VLC-based approaches, while leading to a significantly reduced complexity at the same time.
Place, publisher, year, edition, pages
NEW YORK: IEEE , 2007. 480-484 p.
Channel capacity, Channel coding, Codes (symbols), Decoding, Optimization, Programming theory, Signal processing, Telecommunication
Computer and Information Science
IdentifiersURN: urn:nbn:se:kth:diva-28977ISI: 000255431000097ScopusID: 2-s2.0-48049085469ISBN: 978-142440955-6OAI: oai:DiVA.org:kth-28977DiVA: diva2:396557
8th IEEE Workshop on Signal Processing Advances in Wireless Communications, Helsinki, FINLAND, JUN 17-20, 2007
QC 201102102011-02-102011-01-252014-11-06Bibliographically approved