| The processing of radar clutter Constant False Alert is a important part of radar detect .And in the VTS(Vessel Traffic Services) systematic capability of processing radar clutter has become a main factor which limits the capability and reliability of target-extracting and target-tracking of radar. With the development of VTS system, it has bring forward more strict requirement to radar clutter processing,So it is a very important and practical meaning job to researching more effective clutter process technology.In this thesis, we mainly study the method of applying of wavelet transform technology in VTS radar clutter CFAR process. On the basis of wavelet multi resolution analysis, we demonstrate the distributing characteristic of wavelet transform coefficient of radar clutter, the smoothness part of clutter tokened the distributing characteristic of clutter energy space, and the wavelet transform coefficient of different distributing type radar clutter took on a normal distribution. Based on the theory, and combined the theory of clutter CFAR process based on statistics characteristic, we proved the principium of constant false alarming process of CFAR processor to clutter of Guass-white and rayleign distribution and analyzed the processing performance. We also proved the principium of floating threshold wavelet CFAR processor that can adapt sorts of distribution type clutter ,and analyzed its robust performance and processing performance.Theory analyzing and simulating experiment indicated that the radar clutter CFAR processor based on wavelet transform have very good restrain effect to clutter, especially the floating threshold wavelet coefficient can effectively suppress the pinnacle composition of the radar clutter without the loss of decreasing the resolution of target ,and significantly improve the SNR.The paper is under imburse project of excellent young cadreman teacher of ministry of education, and accomplished under the guidance of Pro. Liu Xiaoming.
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