Data-assisted satellite-borne AIS (automatic identification system) signal synchronization parameter estimation method and system
A technology for synchronizing parameters and signals, applied in baseband system components, shaping networks in transmitters/receivers, etc., can solve the problems of inability to reach spaceborne AIS receivers, low calculation accuracy, and small estimation range.
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[0052] Embodiment: a kind of data-assisted satellite-borne AIS signal synchronization parameter estimation method is characterized in that it comprises the following steps:
[0053] ① The antenna receives the radio frequency signal transmitted by the AIS system of the ground ship and sends it to the receiver;
[0054] ②The receiver demodulates the received RF signal into a baseband signal and inputs it to the FPGA data acquisition module;
[0055] ③ The FPGA data acquisition module performs analog-to-digital conversion on the received baseband signal to obtain a digital baseband signal, which is input to the signal processing module;
[0056] ④The signal processing module processes the received digital baseband signal to obtain the correct AIS ship information input data storage module;
[0057] ⑤ The data storage module stores the received AIS ship information.
[0058] The processing method of digital baseband signal by data processing module in described step 4. is made o...
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