Method for realizing frequency monitoring by high-frequency radar receiver

Abstract

The method is used for implementing a real time spectrum monitoring on the basis of current higher-frequency radar. The work gap of higher-frequency radar is used to monitor the external interference noise spectrum, and to implement the realtime statistic for external noise environment. According to the result of statistic the working frequency of radar is renewed. The invention can also implement the reception of radar back wave and environment monitoring in outer space.

Description

technical field [0001] The invention relates to a high-frequency radar receiving technology; specifically, it is a method with real-time spectrum monitoring function completed on the basis of the existing high-frequency radar receiver. Background technique [0002] The high-frequency surface wave radar marine environment monitoring system is an advanced radar system developed by Wuhan University to detect marine environmental elements such as wind, waves, current fields and low-speed moving targets on the ocean surface. The system uses linear frequency modulation pulse compression and software radio technology, and the receiver adopts multi-channel receiving technology and array signal processing technology to obtain rich ocean state information. [0003] Due to the existence of environmental noise and external interference, the performance of radar detection is directly affected. In order to select a high-quality radar operating frequency, it is very important to monitor a...

AI Technical Summary

Problems solved by technology

The existing spectrum monitoring scheme adopts equipment based on noise spectrum analysis and radar equipment works on the principle of time-sharing. Spectrum monitoring is designed as an independent module, which does not occupy the resources of the radar host, but increases the research and development Cost and System Complexity

[0004] A utility model patent of Wuhan University "High Frequency Ground Wave Radar Digital Coherent Receiver" (ZL: 200420057632.3), such as figure 1 , consisting of an antenna 1, a transceiver switch 2, a first bandpass filter 3, a mixer 4, an amplifier 5, a second bandpass filter 6, an adjustable gain amplifier 7, an analog-to-digital converter 8, a synchronous controller 9, Composed of local oscillator frequency source 10, digital signal processor 11, USB bus 12, and PC 13; use transceiver co-station, linear frequency modulation interrupt continuous wave, primary mixing band-pass sampling and digital signal processor to complete multi-channel data processing; Stable performance, simple structure, good system linearity and dynamic stability; but no spectrum monitoring function

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