Method and device for estimating frequency ramp and frequency deviation in satellite mobile communication system
A satellite mobile communication and frequency offset estimation technology, applied in the field of communication, can solve the problems of high computational complexity and low precision
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[0039] The method of the present invention is referred to as "frequency ramp-up heuristic method", and the specific implementation is as follows (flow process see figure 1 ):
[0040] Step 1, by calculation or measurement, obtain the frequency ramp value a of the actual communication system (for example, in low-orbit satellite communications, when the carrier frequency is 7GHz, the typical maximum frequency ramp value is about 500Hz / s), divided by the carrier symbol rate f s The square of the normalized frequency ramp-up value a D upper limit of
[0041] | a D | max = a f s 2
[0042] The method of the present invention needs to a D Equally spaced trials are performed, given that the key factor affecting carrier synchronization performance is the normalized tota...
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