基于频率分集阵列的多功能一体化波形设计与信号处理方法

Waveform Design and Signal Processing Method of a Multifunctional Integrated System Based on a Frequency Diverse Array

频率分集阵(FDA)是在相控阵基础上的一次体制革新,其通过在发射天线阵元间进行频率步进,得到的发射方向图是角度、距离、时间的多维函数,显著提升了波束控制能力与信号处理维度,经过收发联合处理后,可应用于多维参数联合估计、主瓣欺骗式干扰抑制、模糊杂波抑制、高分宽幅成像等方面。该文从系统层面出发,研究基于FDA的多功能一体化波形设计与信号处理方法,重点对其在检测与估计一体化、解模糊与抗干扰一体化、合成孔径雷达(SAR)成像与动目标检测一体化的信号处理新方法进行综述、评述及研究,并对FDA多功能一体化系统的应用前景进行展望。

A Frequency Diverse Array(FDA),developed innovatively based on phased array radar,can obtain an angle-range-time-dependent multidimensional transmit beampattern by modulating frequencies across different transmit antenna elements,which considerably increases the beam control ability and signal processing dimension.After joint transmit-receive processing,an FDA can be applied to various areas,such as multidimensional parameter joint estimation,mainlobe deceptive jammer suppression,ambiguous clutter suppression,and high-resolution and wide-swath imaging.This study investigates the waveform design and signal processing method of a multifunctional integrated system based on an FDA from the system level,with emphasis on new signal processing methods for integrated detection and estimation,integrated ambiguity resolution and jammer suppression,as well as integrated Synthetic Aperture Radar(SAR)imaging and moving target detection.Moreover,the application prospects of FDA multifunctional integrated systems are provided.