Research on High Dynamic Signal Capture Technology Based on Guide Frequency Assistance
Aiming at the problems of high speed and acceleration during the relative movement of satellite and high dynamic termi-nal,which cause large Doppler frequency shift span and high variation rate,apilot-assisted high dynamic burst signal capture tech-nique is proposed;the study investigates the channel characteristics of the satellite-terminal communication link,and the technology adopts countermeasures based on the FFT algorithm and frequency bias pre-compensation,which constructs the Doppler frequency shift compensated channel models for the transmitter and receiver;and designs a new architecture of multi-frame header synchroniza-tion and pilot-assisted architecture,which effectively reduces the error rate of the frame transmission under the low signal-to-noise ra-tio;the simulation results show that:the algorithm achieves a 1 × 10-5 BER index with an improvement in the reception sensitivity of approximately 3 dB,which meets the demand of high dynamic terminal access to the satellite mobile communication system.
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维普
