脉冲压缩雷达信号的FDA特性研究

Research on FDA Characteristics of Pulse Compression Radar Signal

考虑到现有关于频率分集阵列(FDA)的文献中大多只基于窄带条件下的简单脉冲假设,较少有对其他脉冲压缩信号的分析。该文在建立FDA数据模型的基础上,推导了FDA收发共型线阵不同接收信号处理机制对应的负型模糊函数。之后,在全波段相干处理FDA雷达结构的基础上对矩形脉冲、线性调频(LFM)、相干脉冲串以及相位编码信号的模糊函数特性分别展开仿真分析。验证了上述几种典型的脉冲压缩雷达信号对该结构的适应性,为后续基于模糊函数优化的FDA雷达发射波形设计及电抗特性研究奠定了基础。

The research of frequency diverse array(FDA) in existing literature is mostly based on the hypothesis of simple pulse under narrowband conditions, but less on other pulse compression signals. Therefore,based on the establishment of the FDA array data model, this paper systematically derives the negative ambiguity function and its characteristics under the FDA-MIMO transmit/receive model. Then, based on the full-band coherent processing of the FDA radar architecture, the ambiguity function characteristics of rectangular pulses,linear frequency modulate(LFM), coherent pulse trains, and phase-encoded signals are simulated and analyzed.The adaptability of the above-mentioned typical pulse compression radar signals to the architecture is verified,which lays an important foundation for the follow-up FDA radar transmission waveform design and reactance characteristics optimization based on ambiguity function optimization.