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
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Journal ArticleDOI
Iterative Receiver Design for Uplink OFDMA Cooperative Systems
Mohamed Marey,Octavia A. Dobre +1 more
TL;DR: It is shown that the optimal detector can be implemented by a bank of maximum a posteriori algorithms and the CIRs estimation can be computed using the space alternating generalized expectation-maximization algorithm, in which the soft information provided by the detector is utilized as a priori information to refine the estimates.
Journal ArticleDOI
Low-Complexity Iterative Receiver Structure for Time-Varying Frequency-Selective Shallow Underwater Acoustic Channels Using BICM-ID: Design and Experimental Results
TL;DR: Although the proposed convolutional BICM-ID receiver matches approximately the performance of turbo-BICM, it exhibits lower implementation complexity and reduced memory requirements, attributes that are attractive for robust high data-rate underwater acoustic modems.
Proceedings ArticleDOI
Code construction for space-time bit-interleaved coded modulation systems
Inkyu Lee,C.-E.W. Sundberg +1 more
TL;DR: This paper analyzes the performance of this space-time coding scheme in a narrow band flat fading channel and single carrier modems and gives constructive binary codes that yield maximum diversity.
Proceedings ArticleDOI
PSK versus QAM for iterative decoding of bit-interleaved coded modulation
TL;DR: It is demonstrated that SCSes of PSK (phase shift keying) with optimum bit pattern assignment are significantly superior in the asymptotic error-floor region to the respective square QAM (quadrature amplitude modulation)SCSes.
Journal ArticleDOI
Arithmetic-BICM for Seamless Rate Adaptation for Wireless Communication Systems
TL;DR: This paper proposes an enhanced BICM, namely, arithmetic-BICM (A-B ICM), which is able to achieve high channel throughput and seamless rate adaptation in time-varying wireless channels and employs a systematic channel code in A-BicM.
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.