Any work period synchronous networking method and equipment of high-frequency ground wave radar

Abstract

The invention discloses a synchronous networking method and equipment for a high-frequency ground wave radar in any work period, which can realize synchronous networking of the high-frequency ground wave radar in any work period. In the equipment, a full-system multi-frequency satellite receiving module tracks a multi-frequency satellite signal and outputs a 1pps signal and a message signal; a digital PLL module takes the 1pps signal as a reference signal to generate a high-precision taming clock signal to drive the FPGA digital processor and the ground wave radar host system; a ground wave radar host system sends networking time sequence parameters including a radar work period to the FPGA digital signal processor; and an FPGA digital signal processor calculates a radar time sequence synchronizing signal according to the 1pps signal, time message information in the message signal and networking time sequence parameters and sends the radar time sequence synchronizing signal to the ground wave radar host system, and the ground wave radar host system starts to work at the rising edge of the time sequence synchronizing signal.

Description

technical field [0001] The invention relates to the technical field of ground wave radar host system and radar networking, in particular to a method and equipment for synchronous networking of high-frequency ground wave radar at any working cycle. Background technique [0002] HF Surface Wave Radar (HF Surface Wave Radar) is an important part of my country's three-dimensional marine environment monitoring network. It uses its advantages of over-the-horizon, all-weather, wide range, high resolution and low cost to realize the traditional "point detection" To the "surface detection" breakthrough. [0003] The high-frequency ground wave radar networking technology is mainly used in the synchronization of the transmission signal timing and the receiving signal timing of the single-station high-frequency ground wave radar host system of the transceiver substation (transmitting and receiving at different locations), or the same station for transmitting and receiving ( In a multi-s...

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing high-frequency ground wave radars work independently, and the echo signals obtained are relatively single, and are easily interfered by the same frequency band of adjacent radars; while a small number of radars that have been networked use the 1pps signal satellite signal synchronization method , is to realize the synchronous timing waveform update immediately after the rising edge of the 1pps signal (the period of each 1pps signal is 1 second), thus requiring 1 second to be divisible by the duty cycle (such as the duty cycle is 500ms, 250ms, 200ms), so the radar parameters Has certain limitations that affect the performance of the radar

At the same time, the existing optical fiber network synchronization method cannot be implemented in coastal and remote islands and reefs. The microwave relay method is easily affected by the sea environment (rain, heavy fog) and is unstable. The atomic clock synchronization method makes the system cost high and expensive. It is difficult to popularize, and the synchronization method using GPS satellite single system is easy to be restricted and blocked by foreign countries

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