抑制直扩系统中窄带干扰插值算法的研究  

Narrow-band interference suppression in DSSS using interpolation algorithms

作　　者：孙志国[1] 郭黎利[1] 顾学迈[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2008年第5期692-694,共3页Journal of Harbin Institute of Technology

基　　金：高等学校博士学科点专项科研基金资助项目(20050217016);哈尔滨工程大学基础基金资助项目(HEUF04104)

摘　　要：为了提高直扩系统窄带干扰的抑制性能,提出了一种基于最小二乘准则和格形结构的插值算法——LSL插值算法.由于LSL插值算法继承了最小二乘准则的精确性、格形滤波器的模块化结构和插值过程对数据样值间相关特性的充分利用;使得其较LSL预测算法在抑制直扩系统中窄带干扰时,收敛速度和稳态特性均有明显的提升.仿真结果表明:LSL插值算法抑制AR型窄带干扰时,较LSL预测算法可获得3 dB^6dB的稳态增益,且收敛步骤明显减少.In order to improve the performance of NBI suppression in DSSS, a kind of novel adaptive interpolation algorithms named LSL interpolators based on the method of Least Squares and Lattice structure are proposed. The convergence speed robustness of LSL interpolation algorithms outperforms LSL prediction algorithms for utilizing the correlation characteristic of signal samples. It is shown that the LSL interpolation algorithms can obtain more 3 dB -6 dB processing gain than LSL prediction algorithms and the convergence period of the improved ones are reduced obviously when they are used to suppress NBI modeled by AR.

关 键 词：LSL插值算法 LSL预测算法 窄带干扰 直扩系统 

分 类 号：TN914.4[电子电信—通信与信息系统]