Wideband spectrum sensing using the all-phase FFT

Huai, Lian; Sobelman, Gerald E.; Zhou, Xiaofang

doi:10.1109/asicon.2011.6157158

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…The apFFT [34,35] algorithm is a full-phase pre-processing of the data, followed by a conventional FFT operation. The spectral value after apFFT is the square of the traditional windowed FFT spectral value, and the phase value of the phase spectrum of the apFFT method is the phase value of the input point (N − 1) at the center of the signal.…”

Section: Theory Of Ranging Performance Improvement Based On Frequency...mentioning

confidence: 99%

Research on wingtip distance measurement of high-speed coaxial helicopter based on 77 GHz FMCW millimeter-wave radar

Zhang¹,

Qiu²,

Hu³

et al. 2023

Meas. Sci. Technol.

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Aiming at the requirements of short-range, high-precision, and high-speed measurement of coaxial helicopter wingtip distance measurement, a millimeter-wave radar wingtip distance measurement scheme is proposed, and the ranging accuracy of FMCW millimeter-wave radar is improved by optimizing the frequency estimation method and the beat-frequency signal processing process. The multi-antenna data coherent superposition method and the correlation search for the estimated frequency are used to shorten the measurement period, and at the same time, the ranging accuracy of the millimeter-wave radar can be improved, and the single measurement time can be guaranteed. Based on frequency refinement, frequency offset method, phase method, amplitude method and fitted approximation method, the frequency estimation of millimeter wave radar differential frequency signal is combined with the influence of bandwidth, measured target shape and material on ranging to improve millimeter wave radar ranging performance comprehensively. Through simulations and experiments, the accuracy, stability, time consuming and application conditions of the optimized algorithm are comprehensively evaluated, and the feasibility of millimeter wave radar wingtip ranging is verified

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Section: Theory Of Ranging Performance Improvement Based On Frequency...mentioning

confidence: 99%