Data processing method for Beidou and GPS common frequency point real-time signal receiving and processing system
A real-time signal and processing system technology, used in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve different pseudo-random codes and data encoding methods, cold start time in tens of seconds, hot start About 1 second, the processing time of automatic positioning is large, and it cannot be used as a real-time application, which can improve the processing speed and efficiency and reduce the amount of calculation.
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[0046] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples. The present invention includes two parts, a hardware technical solution and a software technical solution.
[0047] hardware technology solutions such as figure 1 As shown, the real-time signals of Beidou II and GPS public frequency points enter the radio frequency front-end (RF) module through the same antenna, undergo a series of amplification, filtering and down-conversion processing, and convert them into 2-bit intermediate frequency digital signals through A / D. Under the control of the FPGA, the intermediate frequency digital signal is collected into the internal FIFO of the FPGA and stored in a certain length of data blocks in a ping-pong manner. Finally, through the USB bus controller, it is transferred to the computer in blocks. The hardware solution mainly includes the following parts:
[0048] like figure 2 As shown, a Max2741 ...
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