A GPU-Based Method for Segmented and Overlapped Partial Correlation Acquisition of Long Codes
A segmented overlapping, long code technology, applied in the field of satellite navigation, to achieve the effect of reducing scale and storage requirements, improving real-time performance, and improving acquisition speed
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0033] For the long-period pseudo-code, take the GPS P code as an example, the pseudo-code period is 7 days, the pseudo-code does not repeat during the entire capture processing period, and the correlation calculation of the entire pseudo-code period cannot be performed like the short code.
[0034] First according to the local time t 0 , take [t 0 t 0 +t] long code data with a duration of t in the time period, and generate a sampling rate of f s , a local reference signal sequence p(n) with a duration of t, where p(n) is {p(0) p(1) … p(tf s )}. Supplement Tf with the local reference signal sequence p(n) s 0, get p 0 (n), namely
[0035]
[0036] Note that the pseudo code rate is f p , at sampling rate f s (f s >2f p ) s...
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