Free space frequency signal transmission system based on phase compensation

Abstract

The invention discloses a free space frequency signal transmission and synchronization system based on phase compensation. The free space frequency signal transmission and synchronization system based on the phase compensation comprises a transmitting station and a receiving station, wherein a reference frequency source provides a reference frequency signal, a transmitting compensator transmits an uplink frequency signal through a transmitting antenna, the transmitting station is used for receiving a returned downlink frequency signal, and actively compensating phase noise input by a frequency signal in a free space transmission process by utilizing the reference frequency signal and the received downlink frequency signal; the receiving station is used for receiving the uplink frequency signal with the phase noise input in the free space transmission process by utilizing a receiving antenna, locking a servo frequency source phase in the uplink frequency signal by utilizing a variable-frequency locking device, generating a downlink frequency signal of which the phase is locked in the uplink frequency signal, and returning the downlink frequency signal to the transmitting station, so that the transmitting station actively compensates the phase noise, and finally the receiving station obtains a frequency signal of which the phase is locked in a reference frequency source of the transmitting station.

Description

technical field [0001] The present invention relates to the field of microwave frequency signal transmission, in particular to a free-space microwave frequency signal transmission system based on phase compensation. Background technique [0002] At present, there are three main directions in the research and application of time-frequency systems. One is the preparation of the time frequency source, which is used to provide the time reference. The second is the transmission system of time and frequency. With a good reference source, it is necessary to accurately release the time and frequency. Therefore, the quality of the time-frequency transmission system directly determines the quality of the time-frequency signal received by the user terminal. The third is the reception of time-frequency signals, such as GPS receivers and the like. [0003] For the time-frequency transmission system, the currently commonly used methods for frequency signal transmission and synchronizat...

AI Technical Summary

Problems solved by technology

In addition, the GPS system is developed and controlled by the U.S. military, which can be set for local performance degradation and restricted use, which will bring security risks to the entire network operation under special circumstances

Images