Improved PMF-FFT PN code capture method

The invention provides an improved PMF-FFT PN code capture method. According to the improved PMF-FFT PN code capture method, down conversion of a reception signal is firstly realized, segmented correlation of the reception signal and a local code is then realized, L-point FFT is carried out on P acc...

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Bibliographische Detailangaben
Hauptverfasser:	WEI JINGFA, KOU JIANHUI, WANG CHIHAO
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	The invention provides an improved PMF-FFT PN code capture method. According to the improved PMF-FFT PN code capture method, down conversion of a reception signal is firstly realized, segmented correlation of the reception signal and a local code is then realized, L-point FFT is carried out on P accumulated sums acquired through segment correlation, K-fold noncoherent integration is carried out repeatedly, whether the peak value of noncoherent integration results surpasses the threshold is detected, if surpasses, the frequency corresponding to the FFT peak value is Doppler frequency, and an initial phase of the corresponding code is a code phase of the reception signal. Through the method, capture sensitivity is improved, and capture time and algorithm operand are reduced.