基于多项式拟合的非线性调频波形设计  

Novel NLFM waveform design based on the polynomial fitting

作　　者：鲍坤超[1] 陶海红[1] 廖桂生[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,西安710071

出　　处：《信号处理》2008年第2期189-191,共3页Journal of Signal Processing

基　　金：国家自然科学基金(60472097)

摘　　要：在非线性调频(NLFM)脉压波形设计的一般原理基础上,提出了一种基于多项式拟合的波形设计方法。用该设计方法设计出的NLFM波形具有低的距离旁瓣和好的多普勒性能,且不需要给出调频和调相显函数的表达式,设计更为灵活、简单,通过大量仿真实验分析了该方法所产生的波形性能与采样频率、多普勒的关系,并根据卷积定理仿真了信号的模糊函数。仿真结果验证了该方法的有效性和可行性。novel method for the designing of nonlinear frequency modulated （NLFM） waveform is presented in this paper, based on the polynomial fitting. The NLFM signals designed by this method are capable of providing low range_sidelobes and good Doppler_tolerance, without giving the frequency and phase apparent functions. The design is more flexible and compact. And also, this paper analysis the relation between waveform and sample frequency, doppler frequency through simulations, and also gives the simulation of the ambiguity of this waveform according to the convolution theory. The simulation and performance analysis demonstrate the feasibility and validity of this method.

关 键 词：非线性调频信号 驻相原理 多项式拟合 

分 类 号：TN957.51[电子电信—信号与信息处理] TN958.3[电子电信—信息与通信工程]