A Synchronous Networking Method and Device for Arbitrary Working Period of High Frequency Ground Wave Radar

Abstract

The invention discloses a method and device for synchronous networking of high-frequency ground wave radars with arbitrary working periods, which can realize synchronous networking of high-frequency ground wave radars with arbitrary working periods. In this device, the multi-frequency satellite receiving module of the whole system tracks multi-frequency satellite signals, and outputs 1pps signal and message signal; the digital PLL module uses the 1pps signal as a reference signal to generate a high-precision tame clock signal to drive the FPGA digital processor and the ground wave The radar host system; the ground wave radar host system sends the network timing parameters including the radar duty cycle to the FPGA digital signal processor; the FPGA digital signal processor according to the 1pps signal, the time message information in the message signal and the networking timing parameters, The radar timing synchronization signal is calculated and sent to the ground wave radar host system, and the ground wave radar host system starts to work at the rising edge of the timing synchronization 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 sub-station (transmitting and receiving in different positions), or the transmission and reception of the same station ( In a mul...

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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