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现代雷达工作在极为复杂的电磁环境中,无线频谱资源被众多系统划分和占用,临近频段信号之间的干扰,将影响雷达系统的工作性能。在雷达发射信号的频谱中有针对性地设置零点,可以避免与外部信号的互相干扰。利用相位扰动技术,对雷达发射信号的相位做适当调整,能够灵活地使频谱在指定频率产生零点。信号幅度保持恒定,因而没有发射能量的损失,由于加入的相位扰动是微小的,雷达信号的固有特征几乎不受影响。相位编码信号是一种脉冲压缩信号,巴克码信号属于相位编码信号中的二相编码信号。文中基于相位扰动技术,研究巴克码序列编码信号的频谱置零处理,仿真和讨论了在巴克码信号频谱的主瓣和副瓣设置单个及多个零点的情况,并分析了误差条件下的置零特性。
Modern radar works in the extremely complicated electromagnetic environment. The wireless spectrum resources are divided and occupied by many systems. The interference between adjacent frequency bands will affect the performance of the radar system. In the radar transmit signal spectrum targeted set zero, to avoid interference with external signals. Using the phase perturbation technique, the phase of the radiated signal can be properly adjusted, which can flexibly make the spectrum zero at the specified frequency. The amplitude of the signal remains constant, so there is no loss of transmitted energy. Since the added phase perturbations are small, the inherent characteristics of the radar signal are almost unaffected. The phase-coded signal is a pulse-compressed signal and the Barker code belongs to the two-phase coded signal in the phase-coded signal. In this paper, based on the phase perturbation technique, the spectrum zeroing processing of Barker code sequence coded signal is studied. The main and side lobe of the Barker code spectrum are simulated and discussed. Zero characteristics.