A novel simplified Log-MAP algorithm suitable for hardware implementation of turbo decoding

In this paper, we propose a simplified Log-MAP algorithm that is equivalent to the Log-MAP algorithm in terms of the bit-error-rate (BER) performance, but without its implementation difficulties. The proposed algorithm is based on a linear approximation of the correction function in the Log-MAP algorithm over different signal-to-noise ratio (SNR) regions. This approximation is simple to implement by avoiding the number of complicated operations. Simulation results demonstrate that this simplified algorithm can achieve the same BER performance as the Log-MAP algorithm.