Research On Millimeter Wave Detection Signal Processing Of Ground Maneuvering Target

Airport blockade plays an important role to deprive air supremacy on the battlefield.In response to the most advanced anti-blocking technology and equipment,the intelligent mine,which is an integration of target detection and fire strike,is employed.In most foreign intelligent mines,sound,vibration and infrared sensors are used to detect and identify targets.In this paper,millimeter wave detection technology is applied.The key technologies of signal processing method for the detection of ground moving targets such as fixed clutter suppression,multiple-target range and velocity extraction and feature extraction for typical airport target based on one dimensional range image and micro-doppler are studied.The main content of this paper includes the following several aspects:1)In order to simplify the target environment and improve the SCR in radar signal processing,the source of the radar clutter under the airport environment are analyzed,the method of frequency spectrum amplitude cancellation has been established to restrain fixed clutter and obtained obvious effect.2)In order to solve the multiple-target range-velocity coupling problem of LFMCW radar,the method of variable slope triangle wave FM is established,simulation results by matlab verify the effectiveness of the algorithm.In addition,in order to make intelligent mine has stable detection performance for moving targets,CFAR threshold and sliding window are combined to achieve the goal of frequency spectrum peak detection.3)Scattering center model of aircraft and armored vehicles in optical region,the one dimensional range image and typical characteristics of target are obtained under high frequency wide-band radar by using FFT.Aiming at rotating parts of aircraft and vibration of armored vehicle body,the rotation and vibration model are established.The micro-doppler feature of target are obtained under narrowband radar by using STFT.The signal processing board of detection for ground moving targets with low cost and high reliability is designed,and the debugging of the software and hardware are finished.The function of signal processing module has been verified by analyzing the data of the car and truck by outfield experiment,which provides theory and technology reference for the signal processing and system realization of intelligent mine for millimeter wave detection.