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Calibration device and method for high-speed data transmission baseband test equipment

A technology of test equipment and calibration device, which is applied in the direction of digital transmission system, transmission system, radio transmission system, etc., and can solve the problems such as regulations and specifications of Doppler frequency and demodulation loss calibration without high-speed baseband test equipment

Active Publication Date: 2019-07-02
SHANGHAI PRECISION METROLOGY & TEST RES INST
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Problems solved by technology

[0006] At present, there are no procedures and specifications for calibrating the two important parameters of Doppler frequency and demodulation loss of high-speed baseband test equipment

Method used

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  • Calibration device and method for high-speed data transmission baseband test equipment
  • Calibration device and method for high-speed data transmission baseband test equipment
  • Calibration device and method for high-speed data transmission baseband test equipment

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Embodiment Construction

[0044] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] The purpose of the present invention is to provide a high-speed digital transmission baseband test equipment calibration device by studying the principle of high-speed digital transmission baseband test bit error and Doppler effect, so as to realize the calibration of demodulation loss parameters and Doppler frequency parameters.

[0046] In order to solve the problem of calibration of demodulation loss parameters, the present invention adopts indirect verification of bit error rate parameters and direct measurement of demodulation loss.

[0047] A high-speed digital transmission baseband test equipment calibration device 100 provided by an embodiment of the present invention is characterized in that it includes a bit error ...

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Abstract

The invention discloses a calibration device (100) for high-speed data transmission baseband test equipment. The device is characterized in that the device comprises a bit error rate parameter verification unit (110), a demodulation loss parameter calibration unit (120) and a Doppler frequency calibration unit (130), and the bit error rate parameter verification unit (110) is used for obtaining abit error rate test result and verifying a bit error rate; the demodulation loss parameter calibration unit (120) respectively calibrates signal energy and noise energy by measuring the signal power and the noise power to obtain a measurement result of the signal to noise ratio; and the Doppler frequency calibration unit (130) is used for quickly capturing Doppler frequency, controlling the sampling time sequence through computer software, dynamically tracking the maximum frequency value in real time, and calculating to obtain the maximum frequency offset.

Description

technical field [0001] The invention belongs to the field of radio electronics, and relates to a high-speed digital transmission baseband test equipment calibration device and method. Background technique [0002] With the development and change of satellite mission requirements, the spaceborne measurement and control subsystem also gradually introduces spread spectrum technology from the mature unified carrier S-band measurement and control system. The measurement and control system adopts the spread spectrum system, and the ground test system of the corresponding spaceborne measurement and control sub-system also adds a baseband processing part on the basis of the channel part of the original unified carrier S-band measurement and control system, that is, uses pseudo-random PN code sequences to The information (remote control, telemetry) data is modulated and transmitted, relying on high-speed spread spectrum codes to ensure ranging accuracy, and using information frames o...

Claims

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Application Information

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IPC IPC(8): H04B7/185H04L1/20
CPCH04B7/18519H04L1/203
Inventor 任黎丽汪桃林陈春萍乔文范凤军张威陈炜朱东欢
Owner SHANGHAI PRECISION METROLOGY & TEST RES INST
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