Signal processing method based on quasi high-order square spectrum
A signal processing and high-frequency signal technology, applied in baseband system, baseband system components, shaping network in transmitter/receiver, etc., can solve problems such as maintenance, discrete spectral line weak calculation complexity, etc. The effects of strong features, slow attenuation of spectral line features, and high engineering application value
Active Publication Date: 2019-03-29
XIDIAN UNIV
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The invention discloses a signal processing method based on a quasi high-order square spectrum. The signal processing method based on the quasi high-order square spectrum comprises the steps of: (1),obtaining a time-domain complex baseband signal; (2), obtaining an envelope sequence and a phase sequence of the time-domain complex baseband signal; (3), obtaining a quasi high-order square signal; (4), obtaining the quasi high-order square spectrum of the time-domain complex baseband signal; and (5), obtaining the spectrum refined quasi high-order square spectrum of the time-domain complex baseband signal. According to a quasi high-order square spectrum calculation method adopted in the invention, the spectral line characteristics of the traditional high-order square spectrum are reserved; furthermore, the operation complexity of calculating the high-order square spectrum is greatly reduced; the spectral line characteristic detection performance of the high-order square spectrum is improved; and thus, the identification performance of the high-order square spectrum in the modulation identification aspect is improved. According to the signal processing method based on the quasi high-order square spectrum disclosed by the invention, a spectrum refining method is adopted at the same time; a spectrum near the spectrum line characteristics is refined; therefore, the spectrum distinguishing rate is increased; and the estimation performance of the high-order square spectrum in frequency offset and baud rate estimation aspects is improved.
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