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Lookup NU author(s): Emeritus Professor Rolando Carrasco
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The performance of turbo codes in quasi-static fading channels both with and without antenna diversity is investigated. In particular, simple analytic techniques that relate the frame error rate of a turbo code to both its average distance spectrum as well as the iterative decoder convergence characteristics are developed. Both by analysis and simulation, the impact of the constituent recursive systematic convolutional (RSC) codes, the interleaver size and the number of decoding iterations on the performance of turbo codes are also investigated. In particular, it is shown that in systems with limited antenna diversity different constituent RSC codes or interleaver sizes do not affect the performance of turbo codes. In contrast, in systems with significant antenna diversity, particular constituent RSC codes and interleaver sizes have the potential to significantly enhance the performance of turbo codes. These results are attributed to the fact that in single transmit-single receive antenna systems, the performance primarily depends on the decoder convergence characteristics for Eb/N0 values of practical interest. However, in multiple transmit-multiple receive antenna systems, the performance depends on the code characteristics. © The Institution of Engineering and Technology 2008.
Author(s): Rodrigues MRD, Chatzigeorgiou I, Wassell IJ, Carrasco R
Publication type: Article
Publication status: Published
Journal: IET Communications
Year: 2008
Volume: 2
Issue: 3
Pages: 449-461
Print publication date: 01/01/2008
ISSN (print): 1751-8628
ISSN (electronic): 1751-8636
Publisher: The Institution of Engineering and Technology
URL: http://dx.doi.org/10.1049/iet-com:20060586
DOI: 10.1049/iet-com:20060586
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