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A telemetry and remote control intermediate frequency demodulation device

A demodulation device, telemetry and remote control technology, used in radio transmission systems, electrical components, transmission systems, etc., to achieve the effect of improving work stability and reducing size

Active Publication Date: 2011-02-16
SHANGHAI SATELLITE ENG INST
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Problems solved by technology

The other channel of the demodulation signal is connected to the amplitude detection circuit

Method used

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  • A telemetry and remote control intermediate frequency demodulation device
  • A telemetry and remote control intermediate frequency demodulation device
  • A telemetry and remote control intermediate frequency demodulation device

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] image 3 It is a schematic diagram of the composition of the service telemetry intermediate frequency demodulation of the present invention, and the remote measurement intermediate frequency demodulation is realized by adopting indirect frequency discrimination. The input telemetry intermediate frequency is filtered by the input filter 301; the filtered output is amplified by the intermediate frequency amplification 303; the intermediate frequency amplification output is routed to the amplitude detection circuit 302 for amplitude detection, and controls the light-emitting diode to turn on and off to indicate whether the input signal is present; the other is coupled to the MC13156 chip 305 The frequency mixing module in the chip is mixed with the local oscillator signal provided by the off-chip local oscillator 304 to be a 10.7MHz signal, which is ampli...

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Abstract

The invention discloses a telemetering and remote control intermediate frequency demodulation device, which is used in a command and data receiving station of a geostationary meteorological satellite ground application system. After the telemetry intermediate frequency input signal is filtered, amplified and mixed, amplified, and limited in the MC13156 chip, the quadrature frequency discrimination outputs the telemetry demodulation signal; the telemetry demodulation signal is also amplified, filtered and integrated. After the remote control intermediate frequency input signal is filtered, amplified, and mixed, amplified, and limited in the MC13156 chip, the quadrature frequency discrimination outputs the remote control demodulation signal; the remote control demodulation signal also needs to be amplified, filtered and limited. The phase-shifting network of orthogonal frequency discrimination is designed separately according to different modulation frequency deviations of coded telemetry demodulation, analog telemetry / fine solar telemetry demodulation, and remote control demodulation. The device realizes intermediate frequency demodulation of business telemetry and remote control by means of frequency discrimination, and has higher integration and better reliability than the existing separation element demodulation technology.

Description

technical field [0001] The invention relates to a modulation and demodulation device, in particular to a business telemetry and remote control intermediate frequency demodulation device for a command and data receiving station of a geosynchronous meteorological satellite ground application system. Background technique [0002] CDAS (Command and Data Receiving Station) is an important component of the ground application system of Fengyun-2 geostationary meteorological satellite. One of its important functions is to complete satellite business measurement and control, that is, to send business remote control commands to satellites and receive satellite business telemetry. The telemetry remote control adopts the secondary modulation system: the telemetry subcarrier realizes carrier modulation by phase modulation; the remote control subcarrier realizes carrier modulation by frequency modulation. The main feature of telemetry modulation is that the modulated signal is multiple su...

Claims

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Application Information

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IPC IPC(8): H04B7/155
Inventor 刘利军党建成夏玉林刘相振周晶唐琪佳何菲
Owner SHANGHAI SATELLITE ENG INST
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