基于校正子的第一类混合ARQ及其性能分析

Syndrome-Based Type-I Hybrid ARQ and Its Performance Analysis

基于校正子的计算提出了一种第一类混合ARQ(HARQ)方案,该HARQ采用Reed-Solomon(RS)码作为纠错子系统,将检错功能巧妙融于译码过程中。对系统误比特率和吞吐量的分析与仿真表明,短码宜采用前向校正子结构,长码宜采用后向校正子结构,而系统的吞吐量与可靠性之间的最佳折衷,可以通过选择恰当的最大重传次数实现。

A syndrome-based type-1 Hybrid ARQ （HARQ） is proposed, where Reed-Solomon code is selected to be the FEC subsystem and the error-detection function is embedded ably in the decoding process. Analytical and simulation results of Bit Error Rate （BER） and throughput efficiency of the system show that syndrome-ahead and syndrome-behind structures are suited to short codes and long codes, respectively. By choosing the maximum of retransmission times, a perfect tradeoff can be obtained between the throughput efficiency and the reliability of the system.