多音干扰信号对直扩通信系统伪码捕获过程的干扰效果分析  

Research on DSSS Receiver PN Code Acquisition Performance under Multiple Tone Interfering Signals

作　　者：吴皓[1] 黄知涛[1] 王岩[2] 周一宇[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]北京信息高技术研究所,北京100085

出　　处：《通信对抗》2011年第1期14-18,共5页Communication Countermeasures

摘　　要：传统的对直扩通信系统干扰样式分析一般认为多音干扰能量分散，干扰效果不如单音干扰理想。从组成多音干扰的每一个单音干扰分量入手，分析其干扰效果，进而得到多音干扰的总体干扰效果。仿真结果表明：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；在确定多音干扰频率分布时，应该充分考虑有用信号频率的分布，做到在其频率范围内的任意有用信号都有一个或者多个单音干扰分量能够对其有效干扰；在确定多音干扰的功率分配时，应该充分考虑有用信号频率的概率分布，对于干扰有用信号频率出现概率较大区域的单音干扰分量，其功率也应该较大。It is believed that multiple tone interfering signal to the DSSS PN code acquisition is less effective than single tone interfering signal because the interfering energy is dispersive. This paper firstly analyses every single tone interfering signal of multiple tone interfering signal, than get the interfering effect of multiple tone interfering signal. Simulation results are presented to show that multiple tone interfering signal is more effective when the frequency can be scouted exactly. Frequency distribution of the multiple tone interfering signal depends on the frequency distribution of the target signal, insuring that every target signal in the frequency range can be interfered by at least one single tone interfering signal. Power allocation also depends on the frequency distribution of the target signal. Power of single tone component of the multiple tone interfering signal should be in proportion to the probability of the target signal.

关 键 词：多音干扰 二维捕获 捕获概率 干信比 

分 类 号：TN914.42[电子电信—通信与信息系统]