一种全计算波束形成的数字阵列雷达

A Kind of DAR Using Calculating Beamforming both in Receiving and Transmitting

介绍一种全数字阵列雷达——综合脉冲孔径雷达,雷达采用收发全数字波束形成。发射时,每个发射单元采用直接产生正交编码波形,从而波形在空间不相干叠加形成聚集波束;接收时,单元接收信号通过一匹配滤波器组,其中每个匹配滤波器对应一路发射信号,由于每个发射和接收单元的空间位置准确已知,从而可以对匹配滤波器组的输出信号进行调相并相加,同时形成多个指向的发射波束。

This issue presents a kind of fully digital array radar--synthetic impulse and aperture radar. It can perform digital beamforming on both transmit and receive. On transmit, orthogonally coded waveforms are directly synthesized at each of the array elements. Due to the orthogonality of each waveform, the various emitted signals will not be combined coherently in space to form a single focused beam. On receive, the signal at each receiver is processed through a bank of N matched filters. Each filter is matched to one of the transmitted waveforms. Since locations of each transmit and receive element are known, these outputs can be phased and combined to form beams in one or more directions.