A Variance-Value-Based Stopping Criterion for BICM-ID

Stopping criterion is an efficient technique to reduce the unnecessary iterations of the iterative decoding process. So far, the overwhelming majority of the existing stopping criteria are designed for turbo-decoder, not for bit-interleaved coded modulation with iterative decoding (BICM-ID) receiver. Because of the differences between the iterative schemes in turbo-decoder and BICM-ID receiver, these existing stopping criteria need greater computational complexity when they are used in BICM-ID. This paper proposes a new efficient stopping criterion called VV, which based on variance value. Simulation results show that compared with the existing stopping criteria, this new scheme performs obviously excellent in the SNR range between 2dB and 2.8dB. At high SNRs, with the increasing of SNR, the performance of VV is getting closer and closer to the one of GENIE criterion which is the ideal but not a practical criterion. Furthermore, the calculation of VV is very simple.