无线分组CDMA通信系统HARQ编码参数优化

HARQ Coding Parameter Optimization of Wireless Packet CDMA Communication System

混合式自动重传请求(HARQ)已成为CDMA无线信道上差错控制的主要技术.在考虑纠错编码冗余位对无线信道资源占用的条件下,引入有效系统吞吐率性能指标,分别对SR和GBNARQ协议在i.i.d和相关信道模型下的混合式自动重传请求协议性能进行了研究.结果表明,在给定纠错编码算法和重传方式条件下,可以通过对冗余信息位长度的合理选择实现系统有效吞吐率的最大化.

HARQ is the main error correcting technology on CDMA wireless channel. In this paper, effective system throughput is introduced as a new metric taking into account the wireless channel occupation of error correcting coding redundant bit. The performance of HARQ for SR and GBN on i.i.d and correlated channel model is evaluated. The result indicates that proper selecting the length of redundant bit can maximize system effective throughput.