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Spoofing is a huge threat to navigation system. Anti-spoofing in acquisition can firstly find spoofing signal. In this paper, a new method is proposed to alarm receiver whether there is a spoofing signal: in acquisition stage, if receiver finds two correlation peaks above a threshold for two times continuously, it indicates a spoofing signal; while if one peak, only if the rough signal-to-noise ratio...
In global navigation satellite systems (GNSS), because of the long period and high chip rate of long pseudo-noise (PN) code, the rapid acquisition is hard to accomplish. To speed up search process, in the paper, a mapping and overlapping based carrier frequency searching technique is proposed. By mapping incoming signals of the same interval to different carrier frequency cells and overlapping together...
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