A method for simulating dynamic signals of qpsk spread spectrum satellites

A technology of dynamic signal and simulation method, applied in the field of spread spectrum communication, can solve problems such as difficult development, and achieve the effects of improving accuracy, eliminating accumulated errors, and being convenient to use

Inactive Publication Date: 2017-02-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the development of the satellite dynamic signal simulation scheme involves a more comprehensive understanding of the entire system, its development is very difficult

Method used

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  • A method for simulating dynamic signals of qpsk spread spectrum satellites
  • A method for simulating dynamic signals of qpsk spread spectrum satellites
  • A method for simulating dynamic signals of qpsk spread spectrum satellites

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Embodiment Construction

[0061] An implementation of the inter-satellite dynamic signal simulation method proposed by the present invention will be described below through a specific implementation example.

[0062] This method is realized in the FPGA V5 series chip XC5V1X330T of Xilinx Company and DSPTMS320C6713 of TI Company, the working clock of ADC and FPGA system is 100MHz, the design adopts the block processing idea, and the overall block diagram is as follows figure 1 As shown, the parameters that need to be configured include: satellite number, satellite dynamic delay, Doppler rate of change, Doppler first-order rate of change, Doppler second-order rate of change, and message data rate. The system can realize the flexible configuration of the above parameters, and the specific implementation process is as follows:

[0063] 1 Step 1: Dynamic value generation at every second:

[0064] Before the system starts, the system needs to be initialized and configured. In the software, set the correspon...

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Abstract

The invention provides a dynamic signal simulation method of a QPSK (Quadrature Phase Shift Keying) spread-spectrum satellite. The method comprises the major four steps of 1, generating a dynamic signal per second according to an initial value of an externally inputted dynamic signal; 2, converting the dynamic signal per second into a dynamic frequency control word; 3, generating a QPSK spread-spectrum signal; 4, feeding back a dynamic emission value and adjusting. According to the method, the initial value of the externally inputted dynamic signal is converted into carrier and pseudo-code Doppler; electronic text data, a pseudo code and the carrier are modulated, then the final spread-spectrum signal is outputted through a DA converter, and the emission dynamic value is fed back to a calibration module, so as to finish the dynamic feedback adjusting, and the dynamic simulation accuracy is improved.

Description

technical field [0001] The invention relates to a QPSK spread-spectrum satellite dynamic signal simulation method, which is related to the research direction of aerospace measurement and control and spread-spectrum signal processing, and belongs to the technical field of spread-spectrum communication related to aerospace. Background technique [0002] In recent years, with the increasing demand for satellite applications, formation flying to realize space virtual detection has gradually become the most active and potential cutting-edge technology in aerospace technology and applications; autonomous navigation of constellations obtains information through its own measurement, and uses autonomous navigation algorithms to realize Autonomous operation of constellations is also a hot topic in aerospace. Among them, inter-satellite link measurement is a key technology that needs to be solved urgently in the study of satellite formation and satellite constellation system. [0003]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/23
CPCG01S19/235
Inventor 常青杨伟才徐勇黄涛吴阳璞赵小鲂
Owner BEIHANG UNIV
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