A Contention-free Memory Subsystem for 5G Turbo Decoder with Flexible Degree of Parallelism

作者：Wu Zhenzhi^*; Liu Dake; Li Xiaoyang; Gong Chen

来源：IEEE International Workshop on Signal Processing Systems (SiPS), 2015-10-14 to 2015-10-16.

• Turbo
• contention-free
• parallel decoding

In 5G communications, to meet the higher throughput requirement of Turbo decoding, Quadratic Permutation Polynomial (QPP) interleaver is adopted for contention-free parallel memory access. However, with the intrinsic attribute of QPP interleaver, the contention-free memory access is achieved only when the codeword length is divisible by the degree of parallelism (P), which leads the selection of P be rather inflexible especially when P is high. In this paper, we present a novel contention-free solution by introducing dual memory access and parallel window dynamic alignment. The proposed method provides more choices of contention- free parallelism. It offers throughput improvements for high parallelism (P>64) decoders with 3GPP LTE-A configurations, and also enables more P selections for QPP-interleaving Turbo decoders.

• 出版日期2015
• 单位北京理工大学