基于交替投影的MIMO雷达最优波形设计  

Optimal Waveform Design for MIMO Radar via Alternating Projection

作　　者：赵宜楠[1] 张涛[1] 李风从[1] 周志权[1] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院,哈尔滨150001

出　　处：《电子与信息学报》2014年第6期1368-1373,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61371181)资助课题

摘　　要：该文研究用于多输入多输出(MIMO)雷达的具有低相关旁瓣的恒模波形设计方法,这类波形可以抑制距离旁瓣遮蔽和不同信号回波之间的相互干扰。首先,根据非周期相关函数与功率谱(PSD)之间的傅里叶变换对关系,将波形的相关特性优化问题转换为功率谱优化问题;然后,基于功率谱拟合的思想,将设计波形的功率谱向理想波形功率谱逼近;最后,在时、频域交替投影的算法框架下,利用快速傅里叶变换(FFT)实现波形的优化设计。计算机仿真表明,该算法能够设计具有良好相关特性的MIMO雷达波形且运算效率较高。This paper discusses the design of unimodular waveforms with low correlation sidelobes that is useful for MIMO radar. These waveforms can suppress range sidelobes masking and mutual interferences among different echo signals. First, according to the relationship between the aperiodic correlation sequences and the waveforms Power Spectral Density （PSD）, the correlation porperty optimization is transformed into the PSD optimization. Then, based on the PSD approximation, the designed waveforms PSDs are approximated to ideal ones. Finally, under the algorithm framework of alternating projection, Fast Fourier Transform （FFT） are used to optimize the waveforms. The numerical simulations demonstrate that the proposed method can design waveforms with good correlations for MIMO radar and it is computationally efficient.

关 键 词：MIMO雷达 波形设计 旁瓣抑制 功率谱逼近 交替投影 

分 类 号：TN957.51[电子电信—信号与信息处理]