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Interpolation Methiod of Frequency and Phase Offsets for Improving Resolution Capability of DFT or FFT
Interpolation Methiod of Frequency and Phase Offsets for Improving Resolution Capability of DFT or FFT
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机译:频率和相位偏移的内插方法,用于提高DFT或FFT的分辨率
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摘要
PURPOSE: A method for interpolating a frequency and a phase offset to improve resolution of DFT(Discrete Fourier Transform) and FFT(Fast Fourier Transform) is provided to improve the frequency of DFT algorithm and the phase resolution without increasing a DFT size by using an internally dividing point. CONSTITUTION: A sampling process is performed to sample received signals according to a predetermined period(101). The received data stream is converted to a frequency area to obtain a frequency spectrum(102). Two continuous samples having the maximum sum are selected from continuous samples of the frequency area(103). A fine frequency offset is estimated by using an internally dividing point of the selected samples(104). A total frequency offset is obtained by adding a coarse frequency offset to the estimated fine frequency offset(105).
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