Method and device for generating multi-scenario and multi-system satellite digital intermediate frequency signals

A digital intermediate frequency signal and multi-system technology, applied in the direction of measuring devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve the problems of complex, expensive, inconsistent time delay of each channel, etc., to achieve low cost, Design flexible effects

Inactive Publication Date: 2014-10-01
PEKING UNIV
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AI Technical Summary

Problems solved by technology

[0003] Navigation satellite analog signal sources are generally complex, expensive, and have the problem of inconsistent delays in each channel

Method used

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  • Method and device for generating multi-scenario and multi-system satellite digital intermediate frequency signals
  • Method and device for generating multi-scenario and multi-system satellite digital intermediate frequency signals
  • Method and device for generating multi-scenario and multi-system satellite digital intermediate frequency signals

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Embodiment Construction

[0039] The basic idea of ​​the present invention is to select a specific user scenario and the selection of the GNSS system; to obtain the satellite position at a certain moment by converting the telegram into an available ephemeris; to obtain the user's position according to the known user scenario; to obtain the satellite Pseudo-range with users; convert the variation of pseudo-range within 1ms into code frequency control word and carrier frequency control word; adjust code frequency and carrier frequency through code frequency control word and carrier frequency control word to generate current The code signal and carrier signal at the moment; the ranging code, data code and carrier are adjusted together and output according to the correct way.

[0040] The technical solutions of the present invention will be further elaborated below with reference to the accompanying drawings and specific embodiments.

[0041] figure 1A schematic flowchart of a method for generating a sate...

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Abstract

The invention discloses a method and device for generating multi-scenario and multi-system satellite digital intermediate frequency signals, and relates to the field of global satellite navigation systems. The device generates the satellite digital intermediate frequency signals and can simulate satellite signals, received by a receiving set, of different systems including the GPS, the GLONASS, the Big Dipper system and the like; the device can also simulate various movement states of the receiving set, and the movement states comprise the static state, the uniform linear motion, the uniformly accelerated linear motion and the like. In an embodiment, the device is composed of a scenario generating module, a satellite position calculation module, a pseudo-range calculation module, a frequency adjusting word calculation module, a code generation module, a carrier wave generation module, a modulation module, a noise generation module and an encoding module. User scenarios and different systems are controlled by a software configuration register, the digital intermediate frequency signals are generated directly, design is flexible, the cost is low, various requirements for design of the navigation receiving set are met, and the method and device have practicable value.

Description

technical field [0001] The invention relates to a method for generating satellite digital intermediate frequency signals. Background technique [0002] Global Satellite Navigation System (GNSS) has played a very important role in today's society. With the improvement and use of China's Beidou system, there are already three systems in the world that can realize independent satellite navigation and positioning, namely the GPS system of the United States and the Russian system. GLONASS system and China's Beidou system. With the increasing demand for positioning, navigation and timing services, the research and development of multi-system baseband processors is deepening, and the number of dual-mode or multi-mode receivers based on different systems is also increasing. Therefore, in the development process of the baseband receiver, the analog source of the navigation satellite signal for multiple systems is an indispensable device. [0003] Navigation satellite analog signal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/27
CPCG01S19/23
Inventor 黄淼于敦山路卫军崔小欣黄永灿
Owner PEKING UNIV
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