变换域LPI信号设计与性能分析  

Design and analysis of the transform domain LPI signal

作　　者：王统祥 范建华 叶永涛 魏祥麟 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]南京电信技术公司,江苏南京210007

出　　处：《电子技术应用》2014年第12期115-117,124,共4页Application of Electronic Technique

摘　　要：信号的低截获概率(LPI)是指发射的信号不被敌方截获或截获概率很低。目前对信号进行LPI性能分析均是从侦察方的角度来考虑,对此首次提出从信号特征角度对其LPI性能进行分析。在国内首次将小波技术应用到LPI信号设计并进行了仿真设计,仿真实现了传统时域方法的信号设计和基于FFT伪随机相位的信号设计;采用了高阶累积量、循环平稳性两种信号检测和参数估计方法,从信号特征角度对其LPI性能进行了分析。实验结果表明,变换域信号的LPI性能优于传统的信号。最后探讨了变换域LPI信号设计技术的进一步研究方向。Low probability of intercept （LPI） of the signal refers to that the signal sent is not intercepted or the probability of intercept is low.The analysis of LPI performance of the signal is discussed in view of the interceptor at present.The paper puts forward a detailed analysis of LPI performance of the signal in the view of the signal character for the first time.It is also the first time that the LPI signal designed based on wavelet transform is introduced and simulated in-country.And then the same way is used to the LPI signal designed based on traditional method and FFT.After simulation,the paper compares the signals with the signal based on the traditional method.It also provided a detailed analysis of LPI performance of the signal in the view of the sig nal character,using high-order cumulants and cyclostationary.The result indicates that LP1 performance of the signal designed based on the transform excels that designed based on the traditional method.Finally,the development trends of the technique of LP1 signal design are discussed.

关 键 词：低截获 小波 伪随机相位 高阶累积量 循环平稳性 

分 类 号：TP302.7[自动化与计算机技术—计算机系统结构]