| 基于重叠变换和时频分析的直扩系统自适应干扰抑制算法 |
| |
| 引用本文： | 夏江华,张家树.基于重叠变换和时频分析的直扩系统自适应干扰抑制算法[J].成都信息工程学院学报,2006,21(6):875-878. |
| |
| 作者姓名： | 夏江华 张家树 |
| |
| 作者单位： | 西南交通大学信号与信息处理实验室,四川,成都,610031 |
| |
| 基金项目： | 电子科技大学校科研和教改项目 |
| |
| 摘 要： | 提出一种新的直扩系统自适应干扰抑制算法。针对维格纳分布的不足，采用重叠变换将多分量信号分解成为一系列的单分量信号并通过维格纳分布去确定单分量干扰的频率，并设计时变IIR滤波器，和通常采用的线性相位FIR滤波器相比，IIR滤波器具有理想的点阻特性。仿真结果证实IIR滤波器的BER性能好于FIR滤波器。
|
| 关 键 词： | 直扩系统 重叠变换 时频分析 干扰抑制 |
| 文章编号： | 1671-1742(2006)06-0875-04 |
| 修稿时间： | 2005年12月22日 |
Adaptive algorithm of narrow-band interference excision based on lapped transform and time-frequency analysis in DSSS |
| |
| XIA Jiang-hua,ZHANG Jia-shu.Adaptive algorithm of narrow-band interference excision based on lapped transform and time-frequency analysis in DSSS[J].Journal of Chengdu University of Information Technology,2006,21(6):875-878. |
| |
| Authors: | XIA Jiang-hua ZHANG Jia-shu |
| |
| Abstract: | A new adaptive algorithm is proposed to suppress the narrow-band interference(NBI) in the direct sequence spread spectrum(DSSS) communication systems.Aiming at the disadvantages of the Wigner-Ville distribution(WVD) the lapped transform(LT) decomposed a multi-component signal into a number of singlecomponent signals and the WVD is applied to them.Therefore the single-component interfer3ence is located and rejected by the time-varying IIR filter.The IIR filter has the ideal characteristic compared with the FIR filter with linear angle.The results of the computer simulation show that the BER of the IIR filter is lower than that of the FIR filter. |
| |
| Keywords: | DSSS lapped transform time-frequency distribution interference excision |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
