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A Research on the Testing System of Sub-carrier in Telemeter and Telecommand System

Author: WangXueMei
Tutor: ZhengLinHua
School: National University of Defense Science and Technology
Course: Information and Communication Engineering
Keywords: Time domain analysis Spectrum analysis Frequency stability measurements ADC quantization precision Time domain error Noise type conversion
CLC: V556
Type: Master's thesis
Year: 2003
Downloads: 145
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Abstract


Monitoring and control system in recent years, the use of satellite unified carrier carrier and subcarrier unified to complete a variety of monitoring and control functions, including the measurement of technical parameters of the subcarrier signal to ensure that the important part of the normal operation of satellite control system. Satellite Monitoring subcarrier signal test system implementation, design and analysis of some of the key technology. The main content of the research include: 1. For the need to implement the function, the paper proposes a comprehensive the index testing requirements of the test system; given the signal flow; easy to use, simple and clear requirements, completed the initial design of the test system menu; 2. The time-domain analysis is a major function of the test, completed the design and realization of the main functions of the time-domain analysis module. Universal oscilloscope and logic analyzer hardware trigger signal, the text design of how the sampled data to trigger signal software trigger, focusing on analysis of the sequence of words triggered the work process; introduce the interpolation display the Select and implementation process, and simulation of the process of interpolation display. 3. The frequency domain analysis is important to extract the signal characteristics, completed the design of the main function of the frequency domain analysis module. Many methods of spectral estimation, signal characteristics and test requirements, simulation analysis to determine the spectral estimation method selected; hardware switch to a different frequency step with the usual spectrum analyzer designed spectrum analysis frequency step soft-switching algorithm and simulation analysis. 4. The method is usually measured frequency stability using a dedicated device, based on sample data, designed to measure the frequency stability of the digital method introduces the principles, methods and performance of the algorithm. 5. Performance of the test system from the required amplitude waveform display resolution, interpolation and spectrum analysis to quantify the accuracy requirements analysis to determine the the ADC parameters; discussion interpolation operation and spectrum analysis of the time domain error; summarized. 6. Completed the initial design of the noise type conversion. The existing Gaussian white noise generation module, a preliminary analysis of the principle and process of conversion from Gaussian white noise to the Rayleigh white noise.

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CLC: > Aviation, aerospace > Aerospace ( Astronauts ) > Ground equipment, test site, launch sites, space base > Ground-based measurement and control system
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