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Turbo Decodulation: Iterative Combined Demodulation and Source-Channel Decoding

Authors:

Thorsten Clevorn, Johannes Brauers, Marc Adrat, and Peter Vary

Journal:

IEEE Communications Letters

Volume:

9

Number:

9

Date:

Sept. 2005

Pages:

820–822

Language:

English

Abstract

We propose the combination of iterative demodulation and iterative source-channel decoding as a multiple Turbo process. The receiver structures of bit-interleaved coded modulation with iterative decoding (BICM-ID), iterative sourcechannel decoding (ISCD), and iterative source coded modulation (ISCM) are merged to one novel Turbo system, in which in two iterative loops reliability information is exchanged between the three single components, demodulator, channel decoder, and (softbit) source decoder. Simulations show quality improvements compared to the different previously known systems, which use iterative processing only for two components of the receiver.

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