基于分?jǐn)?shù)階傅里葉變換的無(wú)線(xiàn)電引信信號(hào)的偵察
Radio Fuze Signal Reconnaissance Based on Fractional Fourier Transform
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摘要: 該文首先論證了分?jǐn)?shù)階傅里葉變換偵察線(xiàn)性調(diào)頻信號(hào)的理論基礎(chǔ),指出由于分?jǐn)?shù)階傅里葉變換是線(xiàn)性變換,克服了雙線(xiàn)性變換帶來(lái)的交叉項(xiàng)干擾,因此在復(fù)雜的電子對(duì)抗環(huán)境中具有更好的檢測(cè)效果。接著提出了一種可變窗譜峰搜索算法。仿真結(jié)果驗(yàn)證了算法的有效性。Abstract: In this paper, LFM signal reconnaissance theory based on fractional Fourier transform is discussed firstly. Compared with bilinear transform, the fractional Fourier transform is a linear operator and it can eliminate the intercross terms. Hence, it has better detection capability in severe electronic warfare environment. And then variable window search peak algorithm is presented. The simulation results validate the effectiveness of this algorithm.
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Namias V. The fractional order Fourier transform and its application to quantum mechanics[J].J. Inst. Math. Appl.1980, 25:241-[2]Almeida B. The fractional Fourier transform and time-frequency representation, IEEE Trans. on Signal Processing, 1994, 21 (11):3084 - 3091.[3]張賢達(dá),保錚.非平穩(wěn)信號(hào)分析與處理.北京:國(guó)防工業(yè)出版社,1998年,第1版:186-223.[4]王宏禹.非平穩(wěn)隨機(jī)信號(hào)分析與處理.北京:國(guó)防工業(yè)出版社,1999年,第1版:112-122. -
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