分块选择重传的LDPC码混合自动重传请求协议设计

Segment selective repeat (SSR) is proposed as a novel retransmission strategy for low destiny parity check codes hybrid automatic repeat request (LDPCC-HARQ). According to the statistical characteristic of relationship between error bits distribution and log-likelihood ratio (LLR) value, each receiving packet is divided into segments of equal length based on channel conditions and only segments estimated the worst corruption are to be retransmitted. The simulation results show that SSR-HARQ strategy outperforms traditional whole packet retransmission (WPR) strategy in bit error rate control and thus increases throughput without costing more storage resources in hardware implementation. SSR-HARQ strategy is applied for channel conditions producing burst errors in clusters and having extreme bit error requirement.