Parallel low memory size decoder

The original turbo-decoding algorithm is a serial mode, which requires large memory and long decoding latency. These drawbacks limit the turbo codes to the real time applications. In this paper, a parallel decoding with sliding window (PDSW) algorithm is proposed in order to reduce the memory requirement. On the one hand, the PDSW algorithm outperforms the serial algorithm by few tenths of a decibel with the same decoding complexity. In addition, it requires memory approximate one magnitude less than the serial algorithm. Hence this algorithm is valuable for the hardware implementation.