基于重叠变换和时频分析的自适应抗干扰算法  

A New Interference Excision Algorithm Based on Lapped Transform and Time-frequency Analysis

作　　者：王思兵[1] 顾青[2] 李毓麟[1] 诸鸿文[2] 

机构地区：[1]上海交通大学光纤区域通信网国家重点实验室,上海200030 [2]上海交通大学电子工程系,上海200030

出　　处：《通信技术》2001年第6期73-76,共4页Communications Technology

摘　　要：将时频分析和重叠变换结合,提出了一种新的直接序列扩频通信窄带干扰抑制算法。通过重叠变换将多分量信号分解成为一系列单分量信号并通过维格纳分布去确定单分量干扰的频率,在此基础上设计一自适应滤波器抑制掉干扰。这种方法对平稳信号和非平稳信号同样适用。给出相应的计算机仿真结果,并与其它变换域算法进行了比较。The paper presents a new narrowband interference excision algorithm in direct-sequence spread spectrum systems which combines time-frequency analysis (TFA) and lapped transform(LT). The LT decomposes a multi-component signal into a number of single-component signals and then Wigner distribution (WD) is applied to them. So the single-component interference is located and rejected by adaptive filtering algorithm. The algorithm is suitable for both stationary and nonstationary signals. Computer simulation results are given and are compared with other transform-domain algorithms.

关 键 词：干扰抑制 时频分析 重叠变换 直接序列扩频通信 

分 类 号：TN914.42[电子电信—通信与信息系统]