Synchronizer, synchronization method and high-speed receiver by using synchronizer

Abstract

The present invention provides a synchronizer of a laser communication distance measurement integration system, a synchronization method of a laser communication distance measurement integration system and a high-speed receiver by using the synchronizer. The high-speed receiver receives high-speed signals, an analog-digital converter (ADC) is used for sampling of the high-speed signals, the sampling data is sent into a Gigabit transceiver (GTH) to perform serial-parallel conversion, and the high-speed serial data is converted to multi-path parallel data with low rate; the parallel data is sent into the synchronizer for signal synchronization, the parallel data is subjected to steps such as parallel data frame capture, dynamic correction, high-speed phase-locked loop tracking and the like in the synchronizer so as to complete accurate synchronization of the high-speed signals through the receiver; and moreover, on the basis of the accurate synchronization of the signals, and a distance measurement result and communication data can be solved out through the distance measurement branch and the communication branch of the receiver. The clock load is reduced and the complexity of the hardware realization is effectively reduced while ensuring the accurate synchronization of signals and accurate distance measurement and communication result.

Description

technical field [0001] The invention relates to a synchronizing device, a synchronizing method and a high-speed receiver using the synchronizing device in an integrated laser communication ranging system, belonging to the technical fields of electronic communication and radar. Background technique [0002] The integrated system of laser communication and ranging requires the use of lasers between space-based terminals (satellites) and ground stations, and between space-based terminals (satellites) and space-based terminals (satellites) to realize the integrated functions of high-speed data transmission and high-precision ranging. That is to use the same channel signal to simultaneously complete the two functions of communication and ranging. It is necessary to start with the similarities and differences of the two functions, and combine the calculation steps of the two as much as possible to save resources and power consumption and construct an intensive system. [0003] One...

AI Technical Summary

Problems solved by technology

The system symbol rate designed by the present invention can reach the Gbps level, and the sampling rate of the analog-to-digital converter (ADC) needs to meet the Nyquist theorem (that is, the sampling frequency of the ADC is at least 2 times the signal frequency) to transmit the symbol Even if the sampled signal undergoes serial-to-parallel conversion, the processing clock of each signal reaches hundreds of megahertz. It is difficult for the traditional synchronization method to synchronize such a high-speed signal; in addition, when the satellite and the ground station When the relative motion rate (dynamic rate) is large to a certain extent, the Doppler effect caused by it will bring about a large frequency offset, and the signal cannot be synchronized, which also makes the receiver unable to complete ranging and communication. Therefore, it is proposed A high-speed receiver and receiving method are developed to solve this problem, and high-speed signal synchronization is the core technology of this high-speed receiver and receiving method

Images