摘要
为了对无线实时多播系统中纠删方案的性能进行精确的分析与评估,提出基于GE(Gilbert-Elliot)信道模型与实际实验数据的精确分析与统计评估方法。提出一种分析混合纠删方案性能的闭式表达式,并设计基于WLAN的实时多播验证与评估系统,在此基础上,采用极大似然估计方法对实验数据进行统计评估。结果表明,GE模型能精确匹配实际删除错误信道,且待评估纠删方案的理论分析结果与实际测试结果基本一致,验证了该方法的精确性,提出的方法对精确分析评估各种纠删方案在无线实时多播系统中的性能具有参考和借鉴意义。
In order to analyze and evaluate accurately the performance of erasure error correction （EEC） schemes in wireless real-time mulficast （WRM） systems, A method which relying on the Gilbert-Elliot （GE） channel model and the practical experimental data was proposed. Namely, a closed-form expression for analyzing the performance of a hybrid EEC scheme over GE channel was contributed. Then, a validating and evaluating system with real-time multicast services over WLAN was designed. Based on the system, the maximum likelihood estimation method was adopted for statistical evaluations. The results show that the GE model can match the practical erasure error channel accurately. Both the analysis results of the hybrid EEC scheme and the experimental results are basically coincident, which validates the accuracy of the method. This method is of reference significance for analyzing and evaluating accurately all kinds of EEC schemes in WRM systems.
出处
《通信学报》
EI
CSCD
北大核心
2012年第1期17-23,共7页
Journal on Communications
基金
国家自然科学基金资助项目(61001068)
教育部博士点基金资助项目(20100094120017)
中央高校基本科研业务费基金资助项目(2009B04014)~~
关键词
无线网络
实时多播
混合纠错
GE信道模型
wireless networks
real-time multicast
hybrid error correction
Gilbert-Elliott channel model
