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A Time-division System Navigation Signal Generation Method

A navigation signal and signal generator technology, which is applied in satellite radio beacon positioning systems, instruments, measuring devices, etc., can solve the problems of easy signal interference and achieve strong anti-interference performance

Active Publication Date: 2020-01-21
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the traditional continuous system signal is used to realize two-way transmission between satellites, two frequency points will be occupied, that is, one frequency point for forward transmission and one frequency point for reverse transmission, which is not a small overhead for the increasingly tight frequency band resources. At the same time, the signal It is also easy to cause interference between

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  • A Time-division System Navigation Signal Generation Method
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  • A Time-division System Navigation Signal Generation Method

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] figure 1 It is a connection diagram of the equipment involved in the method of the present invention. The equipment involved in the method of the present invention is mainly a time-frequency signal generator, an intermediate frequency signal generator, a KA frequency band up-converter, and the like. Among them, the time-frequency signal generator provides 10MHz and 1PPS signals for the intermediate frequency signal generator, and provides 10MHz signals for the KA frequency band up-converter. The intermediate frequency signal generator includes a DSP module, an FPGA module and a D / A conversion module, and can generate an intermediate frequency signal of a time-division system. The KA-band up-converter can convert the input IF signal into a KA-band RF signal.

[0036] figure 2 It is a functional block diagram of the code clock DDS channel of the met...

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Abstract

The invention discloses a time-division system navigation signal generation method. The method is first applied in the field of satellite navigation. By building a time-division system navigation signal generation system, the time-frequency signal generator can provide stable 1PPS and 10MHz signals, and the intermediate frequency signal can generate The device first generates the required code clock, message clock and time-division pulse, and is driven by these clocks to generate time-division code sequences and message information. Time-division code sequences and message information are spread-spectrum modulated to generate time-division spread-spectrum signals. Dynamic carrier quadrature modulation generates time-division digital baseband signals, and after D / A conversion and up-conversion, a time-division system navigation signal is generated. The method realizes two-way transmission between satellites through time-division multiplexing, can effectively utilize frequency resources, and simultaneously improves the anti-jamming performance of navigation signals.

Description

technical field [0001] The invention relates to the fields of signal generation, satellite navigation, time frequency and the like, and particularly relates to a signal generation problem of a time-division system in the field of satellite navigation. Background technique [0002] At present, the satellite navigation system is undergoing rapid development. With the development of the satellite navigation system, nearly a hundred navigation satellites of the four major navigation systems will coexist. The limited frequency resources will be more tense, and the compatibility between multiple systems and interoperability is becoming a topic of increasing importance. How to reasonably and effectively use frequency band resources within a limited frequency band without interfering with each other has become an urgent problem to be solved in current signal research. Around this problem, the method of the present invention launched a series of explorations on related content. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/37
CPCG01S19/37
Inventor 李绅王跃周雪娟杨国学许磊
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP