Array type channel, GNSS receiver and signal processing method
An array and channel technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problems of high resource overhead and complex GNSS receiver structure, and achieve the effect of simplifying the system operation state
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[0049] Analyzing the design structure of the existing GNSS receiver, there are two main modules that cause the structure of the GNSS receiver to be complex and the resource overhead is too large: one is the capture module, and the other is the external coprocessor.
[0050] Specifically, there are two commonly used capture modules, one is the capture module using matched filter + FFT algorithm, and its signal processing flow in the capture state is usually as follows figure 2 shown; the other is the capture module using FFT+IFFT algorithm, and its signal processing flow in the capture state is usually as follows image 3 shown. A common problem in the two capture modules is that after digital down-conversion, a buffer with a huge storage capacity (Buffer) is required to store sampling data with sufficient integration time length. Therefore, the coherent integration time and non-coherent integration time of these two algorithms are limited by the buffer size after digital dow...
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