Method for synchronizing radio navigation system with direct sequence spread-spectrum and frequency hopping system
A radio navigation and spread frequency hopping technology, applied in the field of synchronization, can solve the problems of increased synchronization time, easy to be intercepted and cracked, poor confidentiality of direct spread codes, etc., to improve overall efficiency, fast acquisition and stable tracking, and confidentiality guarantee. Effect
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[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] combine figure 1 Describe this embodiment, the radio signal distribution of the radio navigation system of the spread frequency hopping system in this embodiment is from f 1 to f n on the n frequency points of each frequency point, and hop between each frequency point according to a pre-designed frequency hopping sequence; the useful signals on each frequency hopping frequency point are all directly spread signals; the period of the direct spread sequence and the hopping The period of the frequency sequence is the same; the number of frequency hopping frequency points n is a factor of the length N of the entire period of the DS sequence, and m DS chips are distributed on each frequency point, then there is a relationship of N=n×m, that is, the DS signal can be uniform are distributed on each frequency point; although not any series of direct spread sequen...
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