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On turbo codes for environments impaired by impulsive noise

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3 Author(s)
Faber, T. ; Duisburg Univ., Germany ; Scholand, T. ; Jung, P.

In the recent past, iterative ("turbo") processing techniques with soft-in/soft-out components have received considerable attention. Examples are turbo decoding, turbo equalization, and turbo multi-user detection. The authors consider the application of turbo-codes to environments with impulsive white noise. Impulsive noise has a non-Gaussian nature and is, e.g., found in some wireless channels due to impulsive phenomena of radiofrequency interference and also in power line and in digital subscriber line communication systems. A detector/turbo decoder concept, derived from turbo equalization, is presented. The illustrated concept avoids numerical instabilities. Clearly, the turbo-codes facilitate considerable performance improvements over non-coded systems in impulsive noise scenarios. Furthermore, for benchmarking reasons, the deployment of a conventional rate 1/2 convolutional code with constraint length 5 and octal generators 238, 358 are taken into account.

Published in:

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th  (Volume:3 )

Date of Conference:

26-29 Sept. 2004

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