Interference Suppression Algorithm Based on Short Time Fractional Fourier Transform

被引：0
|
作者：
Guo, Xiaolu [1 ]
Su, Jia [2 ]
Zhu, Nan [1 ]
机构：
[1] Xian Technol Univ, Sch Elect Informat Engn, Xian 710021, Peoples R China
[2] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710072, Peoples R China
来源：
SENSORS | 2024年 / 24卷 / 06期
基金：
国家重点研发计划;
关键词：
interference suppression; short time; fractional Fourier transform; RFI SUPPRESSION; SAR; REMOVAL;
D O I：
10.3390/s24061785
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Narrowband interference and wideband interference are both common jamming signals against synthetic aperture radar, which can degrade the signal severely. To suppress interference effectively, an interference suppression method based on short-time fractional Fourier transform (STFrFT) is proposed. After transforming the signal into the time-frequency domain through STFrFT, an adaptive gain coefficient is determined for the instantaneous frequency spectrum at every certain time. The gain coefficient can be preserved while suppressing the interference. Finally, we obtain the useful signal by inverse STFrFT. The simulation and performance analysis show the effectiveness and validity of the proposed algorithm for measured data.
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页数：10
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