| Analysis and application of wavelet transform in target imaging and detection of stepped frequency MMW radar |
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| 作者姓名： | Zhao Bin Quan Taifan & Wang JinrongResearch Institute of Electronic Engineering Harbin Institute of Technology Harbin P. R. China |
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| 作者单位： | Zhao Bin，Quan Taifan & Wang JinrongResearch Institute of Electronic Engineering，Harbin Institute of Technology，Harbin 150001，P. R. China |
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| 摘 要： | 1.INTRODUCTION InMMWradar,steppedfrequencysignalisoften chosentobetheemissionwaveform,andthetarget scatteringpropertiescanbedescribedasmultiscatter ingcenters.Modernspectrumanalysiscanimprove therangeresolution,butitneedscomplexsignal modeling,sufficientSNRandheavycomputation. Becauseofthegoodpropertiesoftime frequencylo calizationandapproximation,wavelettheoryhasbeen widelyappliedintotheimagingoftargetrangeprofile inthefieldofhighresolutionradar.InRefs.1,2] thewaveletanalysisisperf…
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Analysis and application of wavelet transform in target imaging and detection of stepped frequency MMW radar |
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| Zhao Bin,Quan Taifan & Wang JinrongResearch Institute of Electronic Engineering,Harbin Institute of Technology,Harbin ,P. R. China.Analysis and application of wavelet transform in target imaging and detection of stepped frequency MMW radar[J].Journal of Systems Engineering and Electronics,2005,16(1). |
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| Authors: | Zhao Bin Quan Taifan Wang Jinrong |
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| Institution: | Research Institute of Electronic Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China |
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| Abstract: | The imaging and target detection methods for stepped frequency signal based on the wavelet transform and its power spectrum are investigated. Not only an imaging and target detection algorithm for stepped frequency signal based on the wavelet transform, but also its respective power spectrum are proposed. The multisampling property of stepped frequency signal is studied and wavelet transform is well suited for analyzing the signal. After multisampling property of stepped frequency signal being studied, it is shown that the wavelet transform is appropriate to analyze the signal. Based on the theory, the wavelet power spectrum analysis is applied to obtain the target range profile and the binary wavelet transform is used to perform target detection. To determine a suitable wavelet scaling for imaging of range profile' s MMW radar, the distance resolution △R technique is proposed. The effectiveness of this new method is evaluated using simulated noisy radar signal. Results show that the proposed method can bring out the exactness and low computational complexity of this method. |
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| Keywords: | MMW radar wavelets transform stepped frequency range profile |
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