色噪声背景下的自适应恒模波形设计  

Adaptive Waveform Design With Constant Modulus in Colored Noise

作　　者：张良[1] 程婷[1] 张欣[2] 

机构地区：[1]电子科技大学电子工程学院,成都611731 [2]中国科学院苏州生物医学工程技术研究所,浙江苏州215163

出　　处：《电子信息对抗技术》2017年第2期19-23,共5页Electronic Information Warfare Technology

基　　金：国家自然科学基金(61401062;61301262)

摘　　要：针对色噪声背景下的雷达发射波形设计问题,提出了一种基于驻定相位原理的恒模波形设计方法。在已知色噪声功率谱密度先验信息的条件下,以最大化输出信噪比为准则,推导出了最优发射波形的能量谱与色噪声功率谱密度的关系;并由最优波形的能量谱,应用基于驻定相位原理的波形设计方法,实现了色噪声背景下的自适应恒模波形设计。与已有算法相比,文章算法所设计的波形,具有良好的恒模特性,可以更好地匹配最优波形能量谱,同时可以获得更高的输出信噪比,仿真结果验证了所提算法的有效性。For the design of radar transmitting waveform in colored noise,a new waveform design method with constant modulus based on stationary phase principle is proposed. With the prior knowledge of noise power density function,the relationship between the energy spectrum of the optimal waveform and the noise power density function is derived based on the criterion to maximize the output signal to noise ratio（ SNR）. Furthermore,on the basis of the energy spectrum of the optimal waveform,the waveform design based on stationary phase principle is applied to realize adaptive constant modulus waveform design under colored noise. Compared with the existing waveform design algorithm,the waveform designed by this paper possesses a good property of constant modulus,matches the optimal energy spectrum better,and higher output SNR could be acquired. The effectiveness of proposed algorithm is proved by the simulation results.

关 键 词：认知雷达 恒模波形设计 驻定相位原理 输出信噪比 

分 类 号：TN951[电子电信—信号与信息处理]