科技创新与生产力
科技創新與生產力
과기창신여생산력
SCI-TECH INNOVATION & PRODUCTIVITY
2012年
4期
107-109
,共3页
盲源分离%循环平稳%联合对角化%平滑伪魏格纳维尔分布
盲源分離%循環平穩%聯閤對角化%平滑偽魏格納維爾分佈
맹원분리%순배평은%연합대각화%평활위위격납유이분포
blind source separation%cyclostationary%union diagonalization%Smoothing Pseudo Wigner Distribution
介绍了基于空间时频分布的循环平稳盲源分离方法,对空间时频分析中交叉项引起的分离能力下降的情况进行了分析,同时将降噪处理应用到算法中,能有效地降低交叉项和噪声的干扰,如选择更有效的时频点进行空间矩阵联合对角化,最终将未知混合信号分离。仿真结果表明,该算法具有较好的收敛性,分离效果明显。
介紹瞭基于空間時頻分佈的循環平穩盲源分離方法,對空間時頻分析中交扠項引起的分離能力下降的情況進行瞭分析,同時將降譟處理應用到算法中,能有效地降低交扠項和譟聲的榦擾,如選擇更有效的時頻點進行空間矩陣聯閤對角化,最終將未知混閤信號分離。倣真結果錶明,該算法具有較好的收斂性,分離效果明顯。
개소료기우공간시빈분포적순배평은맹원분리방법,대공간시빈분석중교차항인기적분리능력하강적정황진행료분석,동시장강조처리응용도산법중,능유효지강저교차항화조성적간우,여선택경유효적시빈점진행공간구진연합대각화,최종장미지혼합신호분리。방진결과표명,해산법구유교호적수렴성,분리효과명현。
In this paper,the authors introduced the method of cyclostationary blind source separation based on time-frequency distribution,and analyzed decreasing of separation ability which caused by cross-term in analyzing time-frequency.At the same time,the authors applied the noise reduction algorithm,which effectively reduce cross terms of interference and noise,such as selecting the more effective when the frequency on space matrix joint diagonalization,will eventually unknown mixed signal separation.The simulation results showed that the algorithm had good convergence and obvious separation effect.
