Proceedings ArticleDOI
Improving BICM performance of QAM constellations for broadcasting applications
C. Abdel Nour,Catherine Douillard +1 more
- pp 55-60
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TLDR
This method outperforms state-of-the-art systems over flat fading channels and substantial gains with respect to bit-interleaved coded modulation are obtained for severe channel conditions.Abstract:
A technique intended to improve the performance of bit-interleaved coded modulations over non Gaussian channels is presented. It introduces signal space diversity by the means of modifications to the constellation mapper and to the corresponding demapper. A rotation of the constellation is followed by a signal space component interleaving. Iterative processing at the receiver side is shown to provide additional error correction. This method outperforms state-of-the-art systems over flat fading channels and substantial gains with respect to bit-interleaved coded modulation are obtained for severe channel conditions. It has been adopted by the Digital Video Broadcasting European consortium in the upcoming next generation of digital terrestrial television, DVB-T2, for the 4-, 16-, 64- and 256-QAM constellations. The resulting improvement in performance can vary from 0.2 dB to several dBs depending on the order of the constellation, the coding rate and the channel model.read more
Citations
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Proceedings ArticleDOI
Design of rotated QAM mapper/demapper for the DVB-T2 standard
TL;DR: In this article, a detection based on the decomposition of the constellation into two-dimensional sub-regions in signal space associated to an algorithmic simplification is presented, which enables to strongly decrease the complexity of the demapper.
Journal ArticleDOI
Coded Modulation with Signal Space Diversity
TL;DR: Investigation of issues of combining SSD with coded modulation systems, e.g., bit-interleaved coded modulation (BICM) and its iterative version, BICM-ID, demonstrates that the average mutual information (AMI) between the signal after rotated constellation mapping and the signal before or after the soft demapper varies with the rotation angle.
Design of rotated qam mapperidemapperfor the dvb-t2 standard
TL;DR: Flexible mapper and demapper architectures for DVB-T2 standard based on the decomposition of the constellation into two-dimensional sub-regions in signal space associated to an algorithmic simplification constitute the main novelty of this work.
Journal ArticleDOI
Optimized One-Way Relaying Strategy With Outdated CSI Quantization for Spatial Multiplexing
Wei Xu,Xiaodai Dong +1 more
TL;DR: An optimized relay precoding strategy is proposed by taking both effects of channel quantization error and feedback delay into account, and is optimized via minimizing an expected mean-square error (MSE) criterion over CSI mismatches.
Journal ArticleDOI
Low Complexity Demapping of Rotated and Cyclic Q Delayed Constellations for DVB-T2
Stefano Tomasin,M. Butussi +1 more
TL;DR: In the proposed approach, only a subset of the constellation points close to the received samples is considered for demapping, and the method is compared with existing techniques both in terms of complexity and performance over reference DVB-T2 channels.
References
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Book
Microwave Mobile Communications
William C. Jakes,Donald C. Cox +1 more
TL;DR: An in-depth and practical guide, Microwave Mobile Communications will provide you with a solid understanding of the microwave propagation techniques essential to the design of effective cellular systems.
Book
Bit-Interleaved Coded Modulation
TL;DR: The goal of this paper is to present in a comprehensive fashion the theory underlying bit-interleaved coded modulation, to provide tools for evaluating its performance, and to give guidelines for its design.
Journal ArticleDOI
Bit-interleaved coded modulation
TL;DR: The paper presents in a comprehensive fashion the theory underlying bit-interleaved coded modulation, provides tools for evaluating its performance, and gives guidelines for its design.
Journal ArticleDOI
Bit-Interleaved Coded Modulation
TL;DR: The theoretical foundations of BICM are reviewed under the unified framework of error exponents for mismatched decoding, which allows an accurate analysis without any particular assumptions on the length of the interleaver or independence between the multiple bits in a symbol.
Journal ArticleDOI
8-PSK trellis codes for a Rayleigh channel
TL;DR: The results suggest that on a Rayleigh channel, the standard trellis codes may not be the correct approach for improving the reliability of the communication channel.