不同信噪比下的被动相控阵雷达比幅测角方法研究

Amplitude-comparison angle measurement methods of passive phased array radar at different SNRs

阐述了被动相控阵雷达中常用的两种单脉冲比幅测角方法,即和差波束比幅法和双波束比幅法。研究了信噪比对两种测角方法精度的影响,提出在实际被动相控阵雷达中可以同时采用两种测角方法,在信噪比较高的情况下采用精度较高的和差测角法,在信噪比较低的情况下则尽量选择双波束测角法。给出了选择这两种算法的信噪比的仿真值。

The two methods of using the monopulse amplitude comparison to perform angle measurement are discussed for the passive phased array radar, namely the sum-difference beam and the dual-beam amplitude comparison. The effects of the SNR on the accuracy of the two methods are stud- ied to draw a conclusion that the two methods can be used simultaneously in the practical passive phased array radar. The sum-difference angle measurement method is used at high SNR, while the dual-beam angle measurement method is selected at low SNR. Finally, the simulation values of the SNRs for the two methods are also given.