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Comparative study of turbo equalization schemes using convolutional, convolutional turbo, and block-turbo codes

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4 Author(s)
Yeap, B.L. ; Dept. of Electron. & Comput. Sci., Southampton Univ., UK ; Tong Hooi Liew ; Hamorsky, J. ; Hanzo, L.

Turbo equalizers have been shown to be successful in mitigating the effects of inter-symbol interference introduced by partial response modems and by dispersive channels for code rates of R⩽ 1/2. We comparatively studied the performance of a range of binary phase-shift keying turbo equalizers employing block-turbo codes, namely Bose-Chaudhuri-Hocquenghen (1960, 1959) turbo codes, convolutional codes, and convolutional turbo codes having high code rates, such as R=3/4 and R=5/6, over a dispersive five-path Gaussian channel and an equally weighted symbol-spaced five-path Rayleigh fading channel. These turbo equalization schemes were combined with an iterative channel estimation scheme in order to characterize a realistic scenario. The simulation results demonstrated that the turbo-equalized system using convolutional turbo codes was the most robust system for all code rates investigated

Published in:

Wireless Communications, IEEE Transactions on  (Volume:1 ,  Issue: 2 )

Date of Publication:

Apr 2002

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