加權重排算法在多目標雷達信號分辨中的應用
Application of the weight reassignment method to multi-object radar signal resolution
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摘要: 該文應用一種加權重排算法，對多目標雷達信號的分辨進行了研究。此加權重排算法簡單且容易實現(xiàn)，重排后的時頻分布雖然失去了雙線性，但保持了其它良好性質，特別是換回了對Chirp信號和沖擊信號的準確定位。針對編隊多目標雷達信號的線性調頻特點，應用加權重排算法在權衡能量聚集性和消除重排振蕩的同時，實現(xiàn)了對編隊多目標雷達信號較佳分辨。Abstract: In this paper, multi-object radar signals resolution is studied by using the weight reassignment method, which can easily be realized because of its fast algorithm and its simple structure. Although time- frequency distribution is not bilinear when the reassignment method is used, it exhibits some other good properties, especially its perfect localizing for chirp and impulse signals. Based on the linear frequency modulation model of radar signals,which are suit for using the reassignment method, real formation radar targets echo data is processed to obtain better radar multi-object classification. A number of experimental results are given to prove that the weight reassignment method can be used to improve time-frequency resolution and capability of restraining interference and noise.
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張賢達,保錚,非平穩(wěn)信號分析與處理,北京,國防工業(yè)出版社,1998年9月,第2章.[2]K. Kodera, C. De Villedary, R. Gendrin, Analysis of time-varying signals with small BT values,IEEE Trans. on Acoustics, Speech and Signal Processing, 1978, 34(1), 64-76.[3]劉玉萍,非平穩(wěn)時頻分析方法及其用于雷達目標識別的研究,[碩士論文],西安,西北工業(yè)大學,2000年3月,第4章,第4節(jié).[4]F. Auger, P. Flandrin, Improving the readability of time-frequency and time-scale representations by the reassignment method, IEEE Trans. on Signal Processing, 1995, 43(5), 1068-1089. -
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