Journal ArticleDOI
Trellis-coded modulation with bit interleaving and iterative decoding
Xiaodong Li,James A. Ritcey +1 more
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TLDR
It is shown that convolutional codes with good Hamming-distance property can provide both high diversity order and large free Euclidean distance for BICM-ID, which provides a simple mechanism for variable-rate transmission.Abstract:
This paper considers bit-interleaved coded modulation (BICM) for bandwidth-efficient transmission using software radios. A simple iterative decoding (ID) method with hard-decision feedback is suggested to achieve better performance. The paper shows that convolutional codes with good Hamming-distance property can provide both high diversity order and large free Euclidean distance for BICM-ID. The method offers a common framework for coded modulation over channels with a variety of fading statistics. In addition, BICM-ID allows an efficient combination of punctured convolutional codes and multiphase/level modulation, and therefore provides a simple mechanism for variable-rate transmission.read more
Citations
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Proceedings ArticleDOI
M-ary coded modulation assisted genetic algorithm based multiuser detection for CDMA systems
Soon Xin Ng,K. Yen,Lajos Hanzo +2 more
TL;DR: In this article, a novel M-ary coded modulation assisted GA-based multiuser detection (CM-GA-MUD) scheme for synchronous CDMA systems was proposed.
Proceedings ArticleDOI
Bit-interleaved trellis coded unitary space-time modulation with iterative decoding
T. Li,Khaled Ben Letaief +1 more
TL;DR: A scheme of bit-interleaved (BI) trellis coded USTM with iterative decoding (ID) increases the diversity order while preserving reasonable minimum Euclidean distance and it is shown that with a moderate complexity increase, system performance can be improved significantly when compared with both uncoded USTM and trell is coded US TM with symbol interleaving.
Journal ArticleDOI
A coding and Modulation scheme for HDTV services in DMB-T
TL;DR: A channel coding and modulation scheme for providing HDTV broadcasting services is presented, which adopts BICM structure as inner code in connection with 64QAM constellation and OFDM transmission and has good SNR performance in both AWGN and multipath channels.
Patent
True bit level decoding of TTCM (turbo trellis coded modulation) of variable rates and signal constellations
TL;DR: In this article, a bit level decoding approach for TTCM of variable rates and signal constellations is presented. But this decoding approach requires the hard decisions/best estimates to be made individually for each of the individual bits of an information symbol.
Proceedings ArticleDOI
A comparison of bit and symbol interleaving in MMSE turbo-equalization
A. Dejonghe,Luc Vandendorpe +1 more
TL;DR: It is shown that bit- interleaved TE with carefully chosen constellation mapping and proper implementation can outperform its symbol-interleaved counterpart, and efficient low-complexity MMSE-based implementations are proposed.
References
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Proceedings ArticleDOI
Near Shannon limit error-correcting coding and decoding: Turbo-codes. 1
TL;DR: In this article, a new class of convolutional codes called turbo-codes, whose performances in terms of bit error rate (BER) are close to the Shannon limit, is discussed.
Journal ArticleDOI
Optimal decoding of linear codes for minimizing symbol error rate (Corresp.)
TL;DR: The general problem of estimating the a posteriori probabilities of the states and transitions of a Markov source observed through a discrete memoryless channel is considered and an optimal decoding algorithm is derived.
Journal ArticleDOI
Channel coding with multilevel/phase signals
TL;DR: A coding technique is described which improves error performance of synchronous data links without sacrificing data rate or requiring more bandwidth by channel coding with expanded sets of multilevel/phase signals in a manner which increases free Euclidean distance.