Research And Analysis Of Pulse Compression Radar Performance And Anti-interference Ability

Pulse compression radar is a kind of radar which owns good performances. It can balance the two important performance indexes, radar range and radar resolution rate. At the same time,it has strong anti-interference ability. Compared with field test, radar system simulation has the advantages of flexible, economically, repeatable and inherits, therefore it is widely used.This thesis is based on the research of a specific radar. The thesis simulates its echo signal and uses it as the input of follow-up study. It completes research and analysis of the radar performance and its anti-jamming ability. Finally, it gives the real radar jamming and anti-jamming test.This thesis includes software simulation and hardware implementation. The specific research contents include:(1)Introduce radar system and several kinds of commonly used pulse compression radar signal format.It selects linear frequency modulation signal as launch waveform. Several kinds of distribution of radar clutter environment are introduced. Get Rayleigh distribution clutter simulation by using the method of nonlinear transformation. Analyze radar antenna model, mainly sinc function model. It also simulates simplified sinc function and 3-D sum-difference patterns. According to the above theory, selection of signal and antenna model, get echo signal simulation of the specific radar.(2) Introduce a radar echo processing system model.Research radar signal after the processing of pulse compression, MTI, MTD and CA-CFAR.Give simulation results of the specific radar echo signal through the signal processing system.(3) Focus on some important tactical indexs of the specific radar, including radar range, power range, signal detection probability, range resolution and precision of angle measurement. Get performance parameters by visual display or simulation analysis.(4)Focus on anti-jamming ability of pulse compression radar. Add common interference pattern in linear frequency modulated waveform, such as noise interference, frequency shift jamming, linear frequency modulation signal interference, delay interference and special smart noise jamming. Simulate signal waveform and calculate SIR before and after the interference. Analyze its anti-jamming ability by using graph, table, text and other forms.(5) Introduce the test of radar jamming and anti-jamming in detail. Show the whole test process by introducing the structure design of the system, test plan, test environment and the results. Combined with the content of the simulation analysis, the thesis puts forward three test scheme and two kinds of test signal design method. Finally shows the indoor test and field test results.