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| Iterative Source-Channel Decoding for GSM |
| Zhou Lin; Wu Zhen-yang |
| Dept. of Radio Engineering, Southeast University,Nanjing 210096, China |
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Abstract In speech signal transmission system, residual redundancy is still left in the parameters after source encoding. The redundancy includes non-uniform distribution and time correlation of subsequent frame. Exploiting the redundancy on bit-level, the paper is proposed iterative algorithm based on soft-in/soft-out channel and parameter estimation, and applies the algorithm to GSM EFR system. The result shows this method reduces the BER and improves SNR of decoded speech.
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Received: 01 March 2004
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2005, Vol. 27 
