Integrated waveform design and signal processing method of satellite-ground communication ranging

Abstract

The invention discloses a satellite-ground communication ranging integrated waveform design and a signal processing method, and relates to the field of satellite-ground communication ranging; specifically, it includes: communicating with a target satellite for a ground station, and simultaneously generating a communication waveform and a ranging waveform; The two waveforms are superimposed to generate an integrated waveform S(t) for transmission. After reaching the receiving end, sampling and matching filtering are performed, delay estimation and time synchronization are performed; then the CP sequence is intercepted from the synchronized signal header, and the locally stored CP is bit by bit. Perform correlation calculations on the sequence to calculate Doppler frequency shift, perform frequency offset compensation, complete time-frequency synchronization, and perform channel estimation on the time-frequency synchronization signal, and subtract the locally stored CP sequence from the signal after eliminating the channel response to obtain the communication waveform, realizing integrated Separation of simplified waveforms, using the separated communication waveforms to obtain communication data; at the same time, the ground station uses the estimated time delay to calculate the distance to the target satellite. The present invention uses the same set of transceiver equipment to ensure effective communication and improve frequency spectrum utilization.

Description

technical field [0001] The invention relates to the field of satellite-ground communication ranging, in particular to a satellite-ground communication ranging integrated waveform design and signal processing method. Background technique [0002] With the continuous development of air-space-ground integration in daily communication, how to integrate ground communication and satellite communication has become the focus of research by experts and scholars. At the same time, various aircrafts such as optical remote sensing satellites, microwave remote sensing satellites, meteorological satellites, communication satellites, navigation satellites and military reconnaissance satellites are playing more and more important roles in production and life. appears to be particularly crucial. [0003] Since the 1960s, satellite ranging systems have been developing continuously, but most of the existing satellite-to-ground communication and ranging systems use two sets of transceivers. A...

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Problems solved by technology

[0005] At present, most satellite-ground communication and ranging are based on two independent systems, which not only cost high equipment, but also cause waste of spectrum resources. In addition, the two sets of equipment process signals separately, which increases system overhead.

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