A Novel Efficient Stopping Criterion for BICM-ID System
Ying Xiao, Li Jianping · International Journal for Infonomics · 2012
This paper devises a novel efficient stopping criterion for bit-interleaved coded modulation with iterative decoding (BICM-ID) system.The new criterion is based on the absolute value of the difference of log-likelihood-ratio (LLR) that between the outputs of the (i) th iteration and the (i-1) th of the soft-input soft-output (SISO) decoder.Simulation results comparing the proposed scheme with the widely used cross-entropy (CE) stopping criterion show that although a little more iteration, the proposed scheme can get excellent performance as CE in terms of bit-error-rate (BER) and can get coding gains at high signal-to-noise ratios (SNRs).More importantly, the proposed new criterion doesn't need any exponential computation, which has greatly reduced the complex computation in the BICM-ID receiver.In addition, detailed discussions regarding various parameters that may affect the decoding performances are also provided.