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| Target Number Detection Based on Radon-WVD Transform |
| Zhao Xue-yun; Liu Zheng |
| National Key Lab. of Radar Signal Processing, Xidian Univ., Xi’an 710071, China |
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Abstract In this paper, the variation of Doppler frequency of the group flying targets is analyzed. For low resolution radars, the echoes of targets can be modeled as Linear Frequency Modulated (LFM) signals. A method for detecting the number of targets is proposed. A fast estimation of character of the whole in the time-frequency domain can be obtained through the Radon-WVD (Radon-Wigner Ville Distribution). The cross-terms of WVD have no influence on the result of the estimation. The method performs well under either higher SNR or lower SNR. The experimental results demonstrate the validity of the method.
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Received: 11 July 2005
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2007, Vol. 29 
