0/pi modulated angle-measurement method based on phase accumulative Doppler frequency offset compensation
A technology of Doppler frequency offset and low-frequency modulation, applied in the direction of modulated carrier system, carrier adjustment, phase modulation carrier system, etc., can solve the problems of poor real-time performance, poor frequency estimation performance, long frequency locking time, etc., to reduce phase consistency Requirements for reliability, reduced cross-coupling, and high-precision effects
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[0036] The present invention will be further described below in conjunction with the drawings and embodiments. The present invention includes but is not limited to the following embodiments.
[0037] The technical idea of the present invention is: 1) Insert two identical CP data segments (symbol length of 128) and Frank sequence (symbol length of 1024) after the synchronization sequence in the frame structure. The frame structure is as attached figure 1 As shown, after the receiving end detects the arrival of the data frame through the synchronization sequence, it performs a complex correlation operation on the two Frank sequences received, and calculates the phase difference between the two Frank sequences based on the obtained complex correlation value, and then calculates the frequency offset , Complete frequency offset compensation; 2) Adopt non-coherent demodulation-amplitude envelope detection technology to reduce the influence of frequency offset on the angle measurement p...
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