High-performance coherent high-frequency radar multi-frequency detection method

A detection method and high-performance technology, applied in the field of radar, can solve problems such as high complexity, high cost, and low performance

Active Publication Date: 2016-12-14
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of low performance, high cost and high complexity of existing dual-frequency detection methods

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  • High-performance coherent high-frequency radar multi-frequency detection method
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  • High-performance coherent high-frequency radar multi-frequency detection method

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Embodiment Construction

[0074] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0075] A high-performance coherent high-frequency radar multi-frequency detection method, such as figure 1 As shown, the method includes:

[0076] Step 1), determine the detection frequency range according to the target characteristics, and determine the detection frequency number N and bandwidth B according to the detection requirements sub ;

[0077] Step 2), design transmitter bandwidth and receiver bandwidth according to the determined number of detection frequencies and bandwidth;

[0078] Determine the number of detection frequencies as N and the corresponding bandwidth as B sub , considering that the actual cutoff frequency of the filter is greater than the bandwidth, in order to avoid interference between different frequency bands as much as possible, the bandwidth B of the transmitter and receiver is required to meet the f...

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Abstract

The present invention provides a high-performance coherent high-frequency radar multi-frequency detection method. The method comprises the steps of 1) assigning the frequency values of a plurality of frequencies and an observation wave beam of each frequency, and according to the direction of the observation wave beam, determining the phase shift increment of each frequency to thereby design an emission signal of each channel of a radar emitter; designing a calibration signal, obtaining an inconsistency error between emission channels and an inconsistency error between reception channels, namely, an amplitude error and a phase error, by taking a first channel as the reference; utilizing the inconsistency error between the emission channels to carry out the amplitude compensation and the phase compensation on the emission signals to thereby correct the inconsistency between the emission channels; 2) using the emitter to filter and amplify the compensated emission signals, and then using an antenna to emit the signals out; then, using the antenna and a radar receiver to receive the echoes of the signals; 3) carrying out the frequency separation on the echo digital signals, and utilizing the inconsistency error between the emission channels obtained in the step 1 to compensate the amplitude and the phase to thereby obtain the radar echo data.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a high-performance coherent high-frequency radar multi-frequency detection method. Background technique [0002] The International Super Bipolar Radar Network (SuperDARN) is a radar network composed of dozens of ground-based coherent high-frequency radar arrays formed to study ionospheric anomalies in mid- and high-latitude regions. The ground-based coherent high-frequency radar array obtains the speed and spectral width of ionospheric drift according to the ionospheric echoes it receives, and further uses it to establish a convective model of the ionosphere. [0003] Ionospheric plasma convection is a form of solar wind-magnetosphere coupling, which is closely related to the electrodynamic process of the magnetosphere-ionosphere system. The direction and magnitude of the interplanetary magnetic field (IMF) are the decisive factors affecting ionospheric convection. The north-sout...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/02
CPCG01S13/02
Inventor 蓝爱兰阎敬业蒋松李广明王赤吴季
Owner NAT SPACE SCI CENT CAS
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