Satellite-ground communication ranging integrated waveform design and signal processing method

Abstract

The invention discloses a satellite-ground communication ranging integrated waveform design and signal processing method, and relates to the field of satellite-ground communication ranging. The method specifically comprises the steps of performing communication with a target satellite for a ground station, and simultaneously generating a communication waveform and a ranging waveform, wherein the target satellite superposes the two waveforms to generate and send an integrated waveform S (t), and sampling, matched filtering, time delay estimation and time synchronization are carried out after the waveform S (t) reaches a receiving end; and then intercepting a CP sequence from the head of the synchronized signal, carrying out correlation operation on the CP sequence and a locally stored CP sequence bit by bit to calculate Doppler frequency shift and carry out frequency offset compensation to finish time-frequency synchronization, carrying out channel estimation on a time-frequency synchronization signal, and subtracting the locally stored CP sequence from the signal after channel response is eliminated to obtain a communication waveform. The separation of the integrated waveform is realized, and the communication data is obtained by using the separated communication waveform; and the ground station carries out distance calculation on the target satellite by using the time delay estimation value. The same set of transceiver is used, and the spectrum utilization rate is improved while effective communication is ensured.

Description

technical field [0001] The invention relates to the field of satellite-ground communication distance measurement, in particular to an integrated waveform design and signal processing method for satellite-ground communication distance measurement. 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 aircraft such as optical remote sensing satellites, microwave remote sensing satellites, meteorological satellites, communication satellites, navigation satellites, and military reconnaissance satellites play an increasingly important role in production and life. Inter-satellite communication and precise measurement of satellite orbit heights appears to be particularly critical. [0003] Since the 1960s, the satellite ranging system has been continuously developed, but...

AI Technical Summary

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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