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Radio frequency processing device and method applied to occultation detection system

A technology of radio frequency processing and detection system, applied in the field of space detection, can solve problems such as low processing accuracy and limited signal frequency range, and achieve the effects of improving data processing accuracy, expanding signal frequency range, and reducing system errors

Pending Publication Date: 2019-01-04
CMA METEOROLOGICAL OBSERVATION CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of GNSS technology, the frequency range of GNSS signals is getting wider and wider, and the processing accuracy requirements for GNSS signals are getting higher and higher. The existing RF processing devices can process signals with limited frequency ranges and low processing accuracy.

Method used

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  • Radio frequency processing device and method applied to occultation detection system
  • Radio frequency processing device and method applied to occultation detection system
  • Radio frequency processing device and method applied to occultation detection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Figure 1a It is a schematic structural diagram of a radio frequency processing device provided in Embodiment 1 of the present invention. The radio frequency processing device provided in this embodiment can be applied in an occultation detection system, and the occultation detection system can be applied to aerostats. Aerostats generally refer to aircraft that are lighter than air and rely on atmospheric buoyancy to lift into the air, including but not limited to tethered balloons and airships. Airships include general airships, stratospheric airships, near-space airships, and space airships. Preferably, the aerostats are generally small aerostats.

[0023] combine Figure 1a , the radio frequency processing device includes an amplification circuit 10 , a power dividing circuit 20 , a frequency selection filter 30 and a radio frequency chip 40 . The power dividing circuit 20 is respectively connected with the amplifying circuit 10 and the frequency selection filter 30 ...

Embodiment 2

[0035] continue to combine Figure 1b , the power dividing circuit 20 comprises a divider of four power dividers; a divider of four power dividers is respectively connected with the first filter 301, the second filter 302, the third filter 303 and the fourth filter in the frequency selection filter 30 304 connection.

[0036] Optionally, the frequency range of the power dividing circuit 20 is relatively wide, 1215MHz-1900MHz; the isolation is strong: a typical value of 23dB; the insertion loss is small: a typical value of 0.7dB.

[0037] Preferably, the first filter 301 selects a frequency point of 1575.42±10.23MHz (L1) of a Global Positioning System (Global Positioning System, GPS) satellite signal; the second filter 302 selects a frequency point of 1227.6±10.23MHz (L2) of a GPS satellite signal; The third filter 303 selects the frequency point of Beidou (BD) 1561.098±2.046MHz (B1); the fourth filter 304 selects the frequency point of BD 1207.14±10.23MHz (B2).

[0038] In ord...

Embodiment 3

[0042] figure 2 It is a schematic structural diagram of a radio frequency processing device provided in Embodiment 3 of the present invention. Optionally, a filter circuit 11 is connected to the input end of the amplifying circuit 10; optionally, the amplifying circuit is a low noise amplifier, preferably, a multi-stage low noise amplifier, such as a two-stage low noise amplifier.

[0043] combine figure 2 and Figure 1b , The radio frequency processing device includes: filter circuit 11, amplifying circuit: low noise amplifier (Low Noise Amplifier, LNA) 10, power dividing circuit: 1 / 4 power divider 20, 4 frequency selection filters 30 and 2 radio frequency chips 40. Wherein, 4 frequency selection filters are the first filter 301, the second filter 302, the third filter 303 and the fourth filter 304 in the above-mentioned embodiment respectively, select GPS L1, L2 and BD B1, B2 respectively Frequency. Optionally, the BD B1 and B2 frequency points include Beidou 2 BD2 B1 ...

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Abstract

The embodiment of the invention discloses a radio frequency processing device and method applied to an occultation detection system. The radio frequency processing device comprises an amplifying circuit, a power dividing circuit, frequency selecting filters and a radio frequency chip, wherein the power dividing circuit is connected with the amplifying circuit and the frequency selecting filters, and the frequency selecting filters are connected with the radio frequency chip; the power dividing circuit is used for performing power division on radio frequency signals outputted by the amplifyingcircuit to obtain multiple channels of radio frequency signals and respectively inputting the multiple channels of radio frequency signals into the corresponding frequency selecting filters; the frequency selecting filters are used for performing corresponding frequency point selection on the received radio frequency signals and inputting signals of the corresponding frequency points into the radio frequency chip; and the radio frequency chip is used for performing intermediate frequency processing according to the received signals to obtain digital intermediate-frequency signals. The embodiment of the invention expands the signal frequency range through simultaneously processing multiple frequency points.

Description

technical field [0001] Embodiments of the present invention relate to space detection technology, and in particular to a radio frequency processing device and method applied to an occultation detection system. Background technique [0002] With the improvement of the Global Navigation Satellite System (GNSS), GNSS remote sensing technology has emerged as the times require and has been greatly developed. GNSS remote sensing technology uses radio waves to propagate in the earth's atmosphere, and changes in physical quantities such as signal amplitude and phase after reflection are used to invert meteorological elements such as the earth's atmosphere. During the GNSS occultation event, the propagation characteristics of the GNSS navigation signal passing through the Earth’s atmospheric profile change due to the influence of atmospheric water vapor density and electron density. By processing the amplitude and phase delay information of the GNSS occultation observation data, The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 杨荣康郭启云李昌兴黄满义刘永成张春泽
Owner CMA METEOROLOGICAL OBSERVATION CENT
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