一种改进的非线性调频信号设计  

An Improved Design for Non-Linear Frequency Modulation Signal

作　　者：何学辉[1] 陶海红[1] 吴兆平[1] 吴顺君[1] 

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

出　　处：《电子学报》2009年第8期1784-1788,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60502045)

摘　　要：在窗函数法的基础上提出一种改进的非线性调频信号方法.该方法采用凸优化求解窗函数法设计非线性调频信号的最小峰值旁瓣抑制相关器,并基于此构造一种新的非线性调频信号,通过多次迭代可进一步降低其距离旁瓣.改进的设计方法在给定的主瓣宽度条件下可以获得较低的距离旁瓣,而且适用于小时宽带宽积的非线性调频信号设计.和已有方法相比,所提方法具有设计灵活和收敛性好的优点.仿真数据结果验证了方法的有效性.An improved method for Non-Linear Frequency Modulation （NLFM） signal design is proposed based on window functions method. The minimum peak sidelobe suppression correlator of NLFM signal,based on window functions,is solved by convex optimization, and based on which a new NFLM signal is presented, its range sidelobe can be farther decreased by multi-iterative operations. Given the limited mainlobe width, a lower range sidelobe can be achieved with the presented method, and also, the presented algorithm can be suitable for the NLFM signal design with small time-frequency product. The proposed method has many advantages over the existing ones, such as design flexibility and quickly convergence. The validity of method is demonstrated by the simulation results.

关 键 词：非线性调频 凸优化 峰值旁瓣抑制相关器 窗函数 

分 类 号：TN957.51[电子电信—信号与信息处理]