Adaptive Transmission with Variable-Rate Turbo Bit-Interleaved Coded Modulation

We study an adaptive transmission scheme based on variable-rate turbo bit-interleaved coded modulation (VR- Turbo-BICM). The proposed coding scheme employs punctured turbo codes. A continuously varying transmission rate can be obtained by changing the code rate through both puncturing of the coded b...

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Veröffentlicht in:IEEE transactions on wireless communications Jg. 6; H. 11; S. 3926 - 3936
Hauptverfasser: Ruoheng Liu, Jianghong Luo, Spasojevic, P.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Piscataway, NJ IEEE 01.11.2007
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Applied sciences
Channels
Closed-form solution
Codes
Constellations
Error probability
Exact sciences and technology
Fading
Interleaved codes
Mathematical analysis
Mathematical models
Modulation
Modulation coding
Performance analysis
Piercing
Predictive models
Rayleigh channels
Redundancy
Studies
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Thresholds
Transmission and modulation (techniques and equipments)
Turbo codes
Fading channels
Performance evaluation
Parameter estimation
Error probability
Mapping
Turbo code
Adaptive method
Variable bit rate
turbo codes
Simulation
Coding
Channel estimation
Interleaved codes
Transmission rate
bit-interleaved coded modulation
Adaptive modulation
Signal to noise ratio
ISSN:1536-1276, 1558-2248
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Beschreibung
Zusammenfassung:We study an adaptive transmission scheme based on variable-rate turbo bit-interleaved coded modulation (VR- Turbo-BICM). The proposed coding scheme employs punctured turbo codes. A continuously varying transmission rate can be obtained by changing the code rate through both puncturing of the coded bits and adapting of the modulation constellation size. The main results are elaborated in two parts. First, we derive a closed-form expression for a set of achievable rate bounds (called rate thresholds) for VR-Turbo-BICM by employing recent results on the parallel channel performance of turbo code ensembles and the BICM parallel channel analysis model. The derived rate threshold is expressed as a fraction of the capacity of BICM with Gray mapping, where this fraction is a turbo code weight spectrum parameter. Simulation results illustrate that introduced rate thresholds predict well the rate versus SNR performance of VR-Turbo-BICM for a wide range of codeword error probabilities and codeword lengths. Next, based on a simplified rate threshold, we derive a power, puncturing rate, and modulation constellation size assignment policy for a slow fading channel.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2007.05725