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| Study on Reconnaissance Signal Parameter Evaluation of PN and LFM Based on Time-Frequency Analysis |
| Lin jun①; Xiong Gang②; Wang Zhi-xue① |
①Communication Academy, PLA University of Science and Technology, Nanjing 210094, China;
②NO. 36 research Institute of CETC, Jiaxin 314001, China |
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Abstract A time-frequency analysis method for reconnaissance signal recognition of PN and LFM is studied. Wigner time-frequency distribution function for PRBC-LFM reconnaissance signal is deduced. By WVD analysis，features related to carrier frequency, FM slope and PN parameters such as sub-pulse width, code-length and pulse cycle are extracted. Then a method for the parameter evaluation is presented. Finally, analysis results are simulated under Gaussian noise conditions. Simulation show the method is superior to spectral correlation method on PRBC-LFM signal recognition and not limited to relations between bandwidth of FM and spectral width of PN.
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Received: 29 November 2004
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2006, Vol. 28 
