基于占格率的实时盲信号分离系统设计及实现  

Design and Implementation of Real-Time Blind Signal Separation System Based on Grid Occupation Ratio

作　　者：陈锴[1] 叶骏[1] 徐柏龄[1] 

机构地区：[1]南京大学声学研究所近代声学国家重点实验室,南京210093

出　　处：《数据采集与处理》2005年第1期64-69,共6页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金 ( 60 2 72 0 3 7)资助项目

摘　　要：以占格率理论为基础 ,提出搜索分离阵权值的盲分离算法。该算法采用统计估计权值分布的方法 ,并通过约束权值的搜索范围 ,有效地去除了伪权值估计带来的干扰 ,适用于各种瞬时混合信号的分离。通过对该盲分离算法进一步简化与改进 ,设计了一种适合于语音盲分离的实时处理系统 ,并且使其在 DSP系统上得以实现。计算机仿真与 DSP系统的实验证明 ,该系统搜索准确率高 ,占用资源少 ,实时性好 。An algorithm for searching the un-mixing matrix based on GOR (grid occupation ratio) is proposed. The algorithm effectively eliminates the disturbance of pseudo result by statistically estimating the distribution of the elements of un-mixing matrix and restricting the searching range. It is high efficient for the separation of different instantaneous-mixed signals. Through some further simplification and improvement, a real time processing system embedded on a DSP board for blind signal separation is presented. Simulation and experiment in the DSP system prove that the system has the advantages of high precision in separation, low demand of DSP resources, easiness of real time realization, and fast tracing to the variation of the environment.

关 键 词：权值 搜索范围 实时跟踪 DSP系统 实时性 计算机仿真 盲分离算法 盲信号分离 混合信号 干扰 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TN911[自动化与计算机技术—计算机科学与技术]