Controllable periodic Doppler frequency shift generator based on communication radio station

A Doppler frequency shift and periodic technology, applied in the electrical field, can solve problems such as signal quality degradation, signal failure to receive correctly, and inconsistency between transmitting and receiving frequencies, etc., to achieve fine frequency points, convenience, and frequency agility fast effect

Active Publication Date: 2016-11-09
CNGC COMM TECH
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  • Claims
  • Application Information

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Problems solved by technology

Due to the existence of the Doppler effect, when a station in a high-speed mobile state performs wireless communication, there will be a phenomenon such as signal quality degradation, resulting in inconsistencies between the frequencies transmitted and received in wireless communication, so that the signal loaded on the frequency cannot be received correctly , can't even receive

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  • Controllable periodic Doppler frequency shift generator based on communication radio station
  • Controllable periodic Doppler frequency shift generator based on communication radio station
  • Controllable periodic Doppler frequency shift generator based on communication radio station

Examples

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Embodiment Construction

[0010] The technical solution includes four parts: a control module 1, a signal processing module 2, a signal amplification module 3 and a crystal filter. Specific examples figure 1 As shown, the output end of the temperature-compensated crystal oscillator circuit 5 is connected to the input end of the control module 1 and the signal processing module 2 respectively, and the control module includes a drive module 1-1, a frequency controller 1-2 and a direct frequency synthesizer 1-3; The signal processing module includes an interpolation filter 2-2, a frequency modulator 2-3 and a digital-to-analog converter 2-4, and the output terminals of the drive module are connected to the interpolation filter, the frequency modulator and the digital-to-analog converter respectively. The input terminal is connected, the output terminal of the digital-to-analog converter is connected with the input terminal of the signal amplification module 3, and the output terminal of the signal amplifi...

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Abstract

The invention discloses a controllable periodic Doppler frequency shift generator based on a communication radio station. The scheme comprises four parts: a control module, a signal processing module, a signal amplifying module and a crystal filter; an output end of a temperature-compensation crystal oscillator is respectively connected with output ends of the control module and the signal processing module; the control module comprises a drive module, a frequency controller and a frequency direct synthesizer; the signal processing module comprises an interpolation filter, a frequency modulator and a digital-analog converter; the output end of the drive module is respectively connected with the input ends of the interpolation filter, the frequency modulator and the digital-analog converter, the output end of the digital-analog converter is connected with the input end of the signal amplifying module, and the output end of the signal amplifying module is connected with the input end of the crystal filter, and the signal is finally output through the frequency.

Description

technical field [0001] The invention belongs to the technical field of electricity and relates to a controllable periodic Doppler frequency shift generator based on a communication station. Background technique [0002] When the mobile station is in motion, the phase and frequency will change due to the difference in propagation distance. This change is usually called Doppler frequency shift, which is a common effect in the field of wireless communication. Due to the existence of the Doppler effect, when a station in a high-speed mobile state performs wireless communication, there will be a phenomenon such as signal quality degradation, resulting in inconsistencies between the frequencies transmitted and received in wireless communication, so that the signal loaded on the frequency cannot be received correctly , even unreceived. Contents of the invention [0003] The task of the present invention is to propose a controllable frequency shift, which can generate maximum f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00
CPCH04L27/0014H04L2027/0026
Inventor 史宝良王辰平姚卫刚张乐鹏杨晓玲郭烜
Owner CNGC COMM TECH
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