Embedded state metric storage used in MAP decoder implementation

摘要：

A method，embedded state metric storage，is used for MAP decoder of turbo codes to reduce the memory requirement of state metrics information calculation.For log MAP decoder，this method includes Selecting all embedded metrics from the updated state metric in each direction，forward and reverse，and subtracting the embedded metric from the state metrics.The contribution of an embedded metric during state metric updating and likelihood ratio calculation is embedded in the relationship among the state metrics.Thus，the embedded metric need not be kept in the state metrics memory，and calculation using the embedded metric call be omitted Therefore，the latency and area in the implementation will be reduced with embedded state metric storage.

关键词： turbo码 嵌入式系统 状态信息 信息存储 解码算法

作者: 李丁 胡剑浩

作者单位: National Key Laboratory of Communication the University of Electronic Science and Technology of China Sichuan Chengdu,610054,Chiha

会议类型: 国内会议

会议名称: 中国通信学会第五届学术年会

会议地点: 南京

会议语种:英文

页码: 707-713

在线出版日期: 2008-02-01（万方平台首次上网日期，不代表论文的发表时间）