GNSS satellite acquisition method, device, storage medium and terminal
A technology for capturing devices and satellites, which is applied in the field of satellite communications to achieve the effect of reducing the amount of calculation, the complexity of calculation, and the number of times
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[0038] Those skilled in the art understand that, as mentioned in the background, the existing GPS receiver needs to perform a two-dimensional search in the code domain and the Doppler domain during the CA code acquisition phase, such as figure 1 As shown, find peaks in the two-dimensional search results (ie figure 1 After a series of logical judgments are made at the "acquisition" place shown), it is determined whether the GPS receiver enters the tracking state. For example, the existing technology can adjust the phase of the CA code generated by the CA code generator and the frequency generated by the carrier numerically controlled oscillator (NCO) through synchronous control logic to complete the two-dimensional search, but this GNSS satellite The captured algorithmic complexity is high.
[0039] Further, since the aforementioned correlation in the search process can be equivalently realized by time-frequency transform and time-frequency inverse transform, for example, fast...
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