Multi-frequency multi-base high-frequency ground wave radar system and operating method thereof

Abstract

The invention relates to a multi-frequency multi-base high-frequency ground wave radar system and an operating method thereof. The multi-frequency multi-base high-frequency ground wave radar system comprises an analog extension, a digital extension, an ultra-high-stability time frequency standard device, a power amplifier, a transmitting antenna, a receiving antenna and a GPS (global position system) antenna. The analog extension comprises a frequency synthesizer, an analog amplification filtering component, an analog frequency multiplier and a multi-channel analog receiving front end, and the digital extension comprises a multi-channel data acquisition and processing board card, a synchronization control board card and an industrial control computer. The frequency synthesizer adopts a digital up-conversion scheme; the analog receiving front end adopts a multi-stage broadband program-controlled tracking and filtering scheme with no need for frequency mixing; data acquisition adopts a radio-frequency direct sampling and digital down-conversion scheme; and the time frequency standard is provided by a GPS tame low-phase-noise and ultra-high-stability crystal oscillator. The multi-frequency multi-base high-frequency ground wave radar system has the following advantages that the all-digital transmission and reception technology is adopted, and the system has good universality and scalability; and the radar waveform and time sequence are flexible and controllable, and the time-sharing, multi-frequency and single-base or multi-base detection can be realized.

Description

technical field [0001] The present invention relates to a radar system and its operating method, in particular to a multi-frequency and multi-base high-frequency ground wave radar system and its operating method. Background technique [0002] High-frequency ground-wave radar utilizes the characteristics of high-frequency electromagnetic waves polarized perpendicular to the sea surface to have low diffraction and propagation attenuation on the ocean surface, and can detect moving targets such as ships on the sea surface, low-flying aircraft and missiles beyond the visual range; at the same time, using The Bragg scattering mechanism of high-frequency electromagnetic waves on the ocean surface can monitor ocean state parameters and information such as sea surface wind, waves, currents, etc., and can realize large-scale, high-precision, and all-weather real-time monitoring of the ocean environment. tool. [0003] In 1997, the radio wave propagation laboratory of Wuhan Universit...

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Problems solved by technology

The flexibility and reliability of the OSMAR2003 system have been greatly improved and improved, but there is still a certain gap with the real software radio thought

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