Portable X wave range Doppler weather radar signal processing method and device thereof

A weather radar and signal processing technology, used in measurement devices, climate sustainability, radio wave measurement systems, etc., can solve the problems of poor frequency stability, large size, heavy weight, etc., to achieve convenient use and maintenance, and improve detection performance. 、Easy to set up and use

Active Publication Date: 2007-08-15
南京大桥机器有限公司
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Problems solved by technology

[0004] The amplitude and phase balance of the I/Q signal is difficult to guarantee, which affects the Doppler speed and spectral width;
[0005] The linear amplifier is greatly affected by temperature, and it is difficult to meet the detection accuracy requirements;
[0006] Automatic frequency tracking method, difficult to adjust, and poor frequency stability
[0007] 2) Traditionally, digital signal processors use low-frequency sampling (I/Q), and a dedicated signal processor chip (DSP) performs si

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  • Portable X wave range Doppler weather radar signal processing method and device thereof
  • Portable X wave range Doppler weather radar signal processing method and device thereof
  • Portable X wave range Doppler weather radar signal processing method and device thereof

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Embodiment Construction

[0050] The portable X-band Doppler weather radar is composed of 8 sub-systems including antenna feeder sub-system, transmitting sub-system, receiving sub-system, digital intermediate frequency receiver, signal data processing terminal sub-system, servo sub-system, monitoring and power sub-system. The radar composition block diagram is shown in Figure 1: The main sub-system technical solutions:

[0051] 1. Receiving subsystem

[0052] The structure of the receiving sub-system is to amplify and frequency transform the weak high-frequency pulse echo signal output by the antenna-feeder sub-system, filter and amplify the intermediate frequency echo signal and send it to the digital intermediate frequency receiver. This sub-system uses a low-noise field effect tube amplifier, a high-stability phase-locked local oscillator and an image rejection mixer, which has the remarkable characteristics of low noise figure and high receiving sensitivity. The intermediate frequency receiver is a dig...

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Abstract

This invention relates to one portable X wave section Doppler gas radar signal process method, wherein, the receive sub system processes wide band receive method on signals to form main path amplifier of low noise sound effect tube to form receive system together with reference signal amplifier ad lock phase vibration and stable lock ; adopting wide band for receive within range of 45MHz-75MHz automatically catching and tracing aim signals; Main path amplifier is composed of low noise sound effect, mixture device for selecting echo signal to output middle frequency signal; the reference signal amplifier is composed of mixture device and middle frequency amplifier.

Description

Technical field [0001] The invention belongs to weather detection electronic equipment, in particular to a portable X-band Doppler weather radar signal processing method and device. Background technique [0002] 1) In the current magnetron intermediate frequency system, most Doppler weather radars use analog receiving technologies, such as linear amplifiers, logarithmic amplifiers, analog I / Q demodulation, and automatic frequency tracking (AFC). The disadvantages are as follows: [0003] The linear dynamic range is low, which cannot meet the requirements of radar detection performance; [0004] The amplitude and phase balance of the I / Q signal is difficult to guarantee, which affects the Doppler speed and spectrum width; [0005] Linear amplifiers are greatly affected by temperature and are difficult to meet the detection accuracy requirements; [0006] The automatic frequency tracking method is difficult to adjust and the frequency stability is poor. [0007] 2) Traditio...

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Application Information

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IPC IPC(8): G01S13/95
CPCY02A90/10
Inventor 陈之典王玉张健许沛胡明星马德山陈永付徐伯雄
Owner 南京大桥机器有限公司
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