Quick recapturing method for signal of highly dynamic satellite navigation receiver
A satellite navigation and receiver technology, applied in the field of satellite navigation, to shorten the search time and improve the recapture efficiency
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[0023] Recapture refers to the capture after the signal is out of lock for a period of time, which requires faster capture speed, and after the signal is captured, the observation data of the channel satellite signal should be formed immediately, and it can immediately participate in the positioning calculation under the condition of reliable ephemeris .
[0024] figure 1 It is the overall flow chart of the method for realizing rapid positioning after the signal is out of lock.
[0025] The module relationship of the system is: all modules take TIC interruption as the basic pace, and then traverse all channels (12) to monitor which channel is in the out-of-lock state, and judge the time of out-of-lock through the observation time scale recorded in each TIC interruption , to determine whether to perform a general two-dimensional search or to preset the code accumulator (the specific process is as follows image 3 shown),
[0026] In the channel recapture stage, the prior inf...
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