Research about improving the BER performance of Turbo decoding based on SNR

摘要

SNR (Signal-Noise Rate) is one of the significant parameters in modern wireless communication system, it doesn't only reflect the influence degree to useful signal caused by noise but is also the indispensable feedback information to improving signal quality. The MAP decoding algorithm of Turbo which has been adopted in LTE system is sensitive to deviation of the SNR estimation, thus this paper deals with a new algorithm for the SNR estimation to ameliorate the performance in terms of BER (Bit Error Rate) of T urbo decoding. Confirmed by Matlab simulation that this SNR estimation algorithm can reduce the bit error rate of Turbo decoding.