基于组合窗的 OFDM-NLFM 信号设计

摘要

高主副瓣比、窄主瓣宽度以及良好的正交特性是多输入多输出雷达波形设计的研究重点。利用组合窗法对非线性调频信号主副瓣比以及主瓣宽度进行了优化，分析了组合参数对信号的影响；在此基础上，提出了基于组合窗优化的正交频分非线性调频信号的设计方法，并对点目标正交频分回波信号进行了匹配滤波。仿真结果表明，优化后的雷达信号具有良好的正交性能。%High ratio of mainlobe peak to sidelobe peak (RMS),narrow mainlobe width and good orthogo-nality properties are the research priorities of multiple-input multiple-output radar waveform design and optimi-zation.Based on the effect of combination parameters on the RMS and mainlobe width,the non-linear frequency modulation (NLFM)chirps are optimized using combined windows.Furthermore,a novel signal design method named of orthogonal frequency division multiplexing NLFM (OFDM-NLFM)is proposed by means of combined windows.Finally,the point target echo of the designed signal is processed using the matched filter.The simula-tion results confirm the good orthogonal performance of the optimized radar signal.