摘要
分析了低密度校验 (LDPC)码译码所产生的错误码字中码位的译码输出量可靠度信息的统计特性。结合自动重传请求 (ARQ)协议提出了一种简单高效的混合ARQ方案 ,和基于译码可靠度的混合ARQ方案 (RB HARQ)的性能进行了比较。仿真结果说明 ,在考虑反向信道重传请求消息信息比特功率的条件下 ,混合ARQ方案的总体性能超过RB HARQ方案 。
For the detected error words by the LDPC decoder, the characteristics of code bits reliability information is investigated. An efficient novel hybrid automatic repeat request (HARQ) scheme is proposed for system coded with Low-Density Parity Check (LDPC) codes. Compared with the Reliability-based hybrid ARQ (RB-HARQ), the new HARQ scheme outperforms the RB-HARQ in consideration of the bit transmission power for the requesting messages in the backward transmission channel. Simulation results show that the new H-ARQ scheme is more practical than RB-HARQ.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第3期361-366,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金 (60 3 0 2 0 0 6)
武器装备预研共用基金 (514 2 0 0 80 10 3JW 0 2 0 5)资助项目
关键词
低密度校验码
混合自动重传请求
可靠度
low-density parity-check codes
hybrid automatic repeat request (HARQ)
reliability
