基于信道增益监测的自动请求重传协议设计及性能分析

项目名称： 基于信道增益监测的自动请求重传协议设计及性能分析

项目编号： No.61302112

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 吴茗蔚

作者单位： 浙江科技学院

项目金额： 25万元

中文摘要： 广泛使用的自动请求重传协议（ARQ）协议最初是为时不变的高斯加性白噪声信道设计的，其常用性能指标是接收端的平均误包率。在时变的无线通信信道，尤其是强衰落情况下，ARQ协议及其平均误包率性能指标都不是最佳的。本项目提出基于信道监测的ARQ协议（ARQ-CGM），并使用误包中断概率作为更准确的性能指标。经理论分析、数值计算与仿真，研究和比较传统ARQ与ARQ-CGM在多种衰落信道模型下的误包中断概率，并在此基础上分析ARQ-CGM中断概率与信道估计差错、纠错码检错码的关系，优化系统设计。通过本项目的研究，期望能将基于中断概率的性能分析理念推广至如吞吐量等常用平均性能指标范畴，构建时变信道中断概率的性能指标框架。

中文关键词： 自动请求重传；信道增益监测；中断概率；衰落信道；分集收益

英文摘要： Widely used Automatic Repeat reQuest (ARQ) protocols were initially designed for time-invariant additive white Gaussian noise channels, based on the commonly used performance measure: average packet error probability. In a time-varying wireless communication channel, especially in deep fades, both ARQ and its average packet error probability are not optimal. This project proposes ARQ with channel gain monitoring (ARQ-CGM) and the use of accepted packet error outage probability as a performance measure. We analyze and compare the accepted packet error outage probabilities of conventional ARQ protocols and those of ARQ-CGM via theoretical analysis, numerical computation and simulations. On top of that, we analyze the effects of channel estimation errors, forward error-correction code and error-detection code, and optimize the overall system performance. With the reseach of this project, we expect to generalize the outage probability performance analysis concept to commonly used average performance measures such as throughput, and construct an outage probability performance measure framework for time varing channels.

英文关键词： ARQ；channel gain monitoring；outage probability；fading channel；diversity gain