CAJ | 학술논문

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。
해문연구용우다수입다수출(MIMO)뢰체적구유저상관방판적항모파형설계방법，저류파형가이억제거리방판차폐화불동신호회파지간적상호간우。수선，근거비주기상관함수여공솔보(PSD)지간적부리협변환대관계，장파형적상관특성우화문제전환위공솔보우화문제；연후，기우공솔보의합적사상，장설계파형적공솔보향이상파형공솔보핍근；최후，재시、빈역교체투영적산법광가하，이용쾌속부리협변환(FFT)실현파형적우화설계。계산궤방진표명，해산법능구설계구유량호상관특성적MIMO뢰체파형차운산효솔교고。
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.