高斯噪声与窄带干扰同时抑制技术  

Suppression of Narrow-Band Interference and Gaussion Noise

作　　者：张晓林 郭黎利[2] 国强[2] 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150001 [2]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《北京邮电大学学报》2009年第4期86-89,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60872108)

摘　　要：为了抑制接收信号中的高斯噪声和窄带干扰,在进一步分析边带相关置换(SCR)算法的基础上,提出了一种新的高斯噪声和窄带干扰抑制算法——循环边带相关置换(CSCR)算法.CSCR算法将SCR思想引入循环谱相关理论中,利用循环谱相关可有效抑制高斯噪声的技术优势,在接收信号的谱相关密度函数中用相对于窄带干扰的边带对称值代替干扰值来重构期望信号,从而实现了高斯噪声和窄带干扰的同时抑制.该算法对谱相关密度谱对称的调制方式均适用.通过对2PSK信号的计算机仿真表明,循环边带相关置换算法可以有效抑制高斯噪声和窄带干扰.For suppressing Gaussian noise and narrow-band interference, a Gaussian noise and narrowband interference suppression algorithm called cyclic side correlation replacement （CSCR） is presented. CSCR is on the basis of the further analysis of side correlation replacement. CSCR algorithm is used for reference SCR in cyclic spectrum. Using cyclic spectrum could suppress Gaussion noise effectively, CSCR algorithm reconstructs the expectation signal by replacing the value of symmetric band with the interference signals. In addition, Gaussian noise is suppressed on the axis of nonzero cyclic frequency because of the non-cyclostationary character, so Gaussian noise and narrow-band interference are both suppressed at the same time. The algorithm is suitable for the modulation mode that has the symmetry of spectral correlation density. At last, through the computer simulation for phase shift keying （2PSK） signal, it shows that the cyclic side correlation replacement algorithm can effectively suppress Gaussian noise and narrow-band interference.

关 键 词：窄带干扰 高斯噪声 循环边带相关置换 二进制移相键控 

分 类 号：TN911.6[电子电信—通信与信息系统]