多音干扰对直扩接收机捕获性能影响分析  

Impact of multiple-tone jamming on acquisition performance of DSSS receiver

作　　者：董冬[1] 王兴亮[2] 

机构地区：[1]中国人民解放军95666部队 [2]空军工程大学电讯工程学院

出　　处：《现代电子技术》2012年第5期1-4,共4页Modern Electronics Technique

摘　　要：结合每个信息码元内有整数个扩频码周期序列的BPSK调制直扩信号接收系统,以二维相关捕获原理为基础,分析了多音干扰对直扩接收机相关比值式捕获的性能影响,并结合PN码功率谱分析,给出较为理想的多音干扰载频位置选择方法,指出对于比值式捕获,在有用信号频率无法准确侦察的情况下,多音干扰能够有效提高干扰范围,干扰效果较好;在信号频率准确侦察的情况下,多音干扰效果较单音干扰效果差。仿真结果验证了理论分析的正确性。The impact of multiple-tone jamming on acquisition performance of DSSS receiver is studied on the basis of two-dimensional correlation acquisition principle.,which makes use of DSSS receiving system modulated by BPSK and each message code is spread by integral number periods of PN code.The ideal frequency distribution of multiple-tone jamming is presented with the mathematical analysis of power spectrum of PN sequence.The multiple-tone jamming can broaden the interference domain with better performance when the carrier frequency can＇t be estimated accurately,and the performance of multiple-tone jamming is worse than single-tone jamming when the carrier frequency can be estimated accurately.At last,the simulation results validate the correctness of theory.

关 键 词：二维捕获 多音干扰 单音干扰 捕获性能 

分 类 号：TN914.41[电子电信—通信与信息系统]