Direction Finding Method of Low Interception Radar Signal Based on Monobit Quantization
JIAO Ruitao
LIN Xiaohong
YE Lingjun
MAN Xin
Abstract：Mono-bit digital receiver has the ability to measure radar frequency in real time,so it has a wide application pros-pect in modern electronic warfare. However,mono-bit quantization in time domain will lead to the loss of pulse amplitude informa-tion and a large number of harmonics in frequency domain. This makes it impossible to use traditional methods such as interferome-ter and radiometric method to locate low probability of interception radar signals. In order to solve this problem,this paper proposes a time difference direction finding method,which combines monobit quantization with pulse compression technology to calculate the time difference between the low probability of interception radar signals arriving at two adjacent antennas,and then obtains the mea-surement value of radar direction. The computational complexity of this method is much lower than that of cross-correlation method based on traditional digital sampling. The simulation results show that the direction finding performance of the proposed method is slightly lower than that of the cross correlation method based on undistorted sampling at low SNR,while the performance of the two methods is very close at high SNR.
Keywords：monobitpulse compressionshort baselinetime difference direction finding
Publication Date：2019-11-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 79-83 )