Weak target detection in sea clutter based on fractional ambiguity function

被引：0
|
作者：
Guo H.-Y. [1 ]
Dong Y.-L. [2 ]
Guan J. [3 ]
机构：
[1] Department of Command, Naval Aeronautical and Astronautical University
[2] Department of Scientific Research, Naval Aeronautical and Astronautical University
[3] Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2011年 / 33卷 / 06期
关键词：
Fractional ambiguity function; Fractional fourier transform; Inverse symmetry rotation angles;
D O I：
10.3969/j.issn.1001-506X.2011.06.03
中图分类号：
学科分类号：
摘要：
The fractional ambiguity function models with two symmetry inverse rotation angles of linear frequency modulation (LFM) signal, monochromatic signal and polynomial signal are researched. A conclusion is obtained: the fractional ambiguity function models with two symmetry inverse rotation angles of LFM signal and monochromatic signal are always the same. Based on this characteristic, a new method for detecting the signal which has high polynomial based on difference of fractional ambiguity function model is proposed. Experiment using the intelligent pixel-processing (IPIX) data shows that the proposed method has a remarkable advantage in increasing the signal-to-clutter ratio (SCR) and fractional ambiguity function model peak value difference. A proper detective threshold is set by introducing the biparametric constant false alarm rate, which makes the proposed method achieve better effects.
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页码：1212 / 1216
页数：4
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