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

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...

AI Technical Summary

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 signal processing to obtain the intensity, speed, and spectral width of precipitation such as clouds and rain. The disadvantage is that it needs independent Computer equipment for signal processing, increasing the amount of radar equipment

[0008] 3) Traditional Puller weather radar has a complex structure, large volume, and heavy weight; it is generally used in a fixed location, and it is impossible to flexibly choose the top of a mountain or the top of a general building as an observation location.

Images