DSSS系统频域干扰抑制最佳门限选择算法研究  

The Research on Best Threshold of the Interference Suppression in Frequency Domain of DSSS System

作　　者：张永飞[1] 魏安全[2] 孙玉琦[1] 

机构地区：[1]解放军理工大学通信工程学院研究生4队,江苏南京210007 [2]解放军理工大学通信工程学院无线通信教研室,江苏南京210007

出　　处：《山西电子技术》2011年第1期82-84,共3页Shanxi Electronic Technology

摘　　要：为了提高DSSS系统的窄带干扰抑制能力,主要针对窄带干扰频域抗干扰算法进行研究。重点对频域处理中干扰门限的设定给出了一种改进的方法。该算法采用设定粗门限,然后逐次消除的算法,最后得到较理想的干扰门限值。经过仿真验证,该方法对于强窄带干扰或多个强窄带干扰在相同信噪比下能够比固定门限干扰抑制算法误码率改善许多。In order to improve the capacity of suppressing narrowband interference in DSSS,this paper mainly puts forward the improved algorithm that setting the interference threshold in the process of frequency domain.This improved algorithm provides the coarse threshold first and then successively cuts down it until the desirable value of interference threshold appears.By testing and verifying in the way of simulation,the result is that under the same SNR this new algorithm for thresholds of one or multiple strong narrowband anti-interference is better to decrease the probability error than the fixed threshold algorithm.

关 键 词：直接序列扩频 FFT 窄带干扰 抗干扰 干扰门限 

分 类 号：TN914.42[电子电信—通信与信息系统]