Error Analysis of Instantaneous Frequency Estimation Based on Short-time Fractional Fourier Transform

doi:10.3969/j.issn.1000-1093.2015.11.013

Abstract

Abstract: As an important content on radar signal processing, instantaneous frequency estimation plays an essential role in target detection and recognition. The higher time-frequency resolution of short-time fractional Fourier transform (STFRFT) is used to analyze the relationship among window function, window width and the instantaneous frequency estimation precision of cubic phase non-LFM signal. The result shows that, when Gauss window is used, the estimation precision is the highest; the prime window width L, the product of pulse width and band width σ_tσ_f and the frequency fluctuation rate k should meet L=33σtσf/2k. Finally, the result is verified through simulation.

Key words: information processing technology, parameter estimation, short-time fractional Fourier transform, instantaneous frequency, error analysis

CLC Number:

TN957.51

DENG Bing， LUAN Jun-bao， TANG Guang-sheng. Error Analysis of Instantaneous Frequency Estimation Based on Short-time Fractional Fourier Transform[J]. Acta Armamentarii, 2015, 36(11): 2104-2110.

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