V.R. Hrudia, P. Sangeetha, Maharaja Institute of Technology, Coimbatore, Tamilnadu, India.
DOI : 01.0401/ijaict.2014.03.02
International Journal of Advanced Information and Communication Technology
Received On : March 10, 2015
Revised On : April 21, 2015
Accepted On : May 17, 2015
Published On : June 05, 2015
Volume 02, Issue 06
Pages : 285-293
Abstract
Turbo codes were a major milestone in the forward error correction codes which can even achieve an excellent bit error rates at low SNR. The original proposal was for the BPSK scheme but were soon successful with multilevel coded as well. The Turbo Trellis Coded Modulation employing two TCM codes as parallel concatenation of two recursive TCM encoder, and adapted puncturing mechanism to avoid the obvious disadvantage of the rate loss The iterative decoder of Turbo Trellis Coded Modulation (TTCM) exchanges extrinsic information between the constituent TCM decoders, which imposes a high computational complexity at the receiver. Therefore we conceive the syndrome-based block decoding of TTCM, which is capable of reducing the decoding complexity by disabling the decoder, when syndrome becomes zero. Quantitatively, we demonstrate that a decoding complexity reduction of at least 17% is attained at high SNRs, with at least 20% and 45% reduction in the 5th and 6th iterations, respectively.
Keywords
Block Syndrome Decoding, TTCM, Iterative Decoding, BSD BICM.
Cite this article
V.R. Hrudia, P. Sangeetha, “Study of Reduced Complexity Syndrome Based TTCM Decoder” INTERNATIONAL JOURNAL OF ADVANCED INFORMATION AND COMMUNICATION TECHNOLOGY, pp.285-293, June 05, 2015.
Copyright
© 2015 V.R. Hrudia, P. Sangeetha. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.