CAPS/Big Dipper bimodule receiver

A receiver and Beidou technology, applied in the field of satellite navigation, can solve the problems of high overhead and power consumption of software receivers, inability to perform real-time processing, and inability to solve the problem of precise code positioning, so as to improve usability and integrity, improve and enhance System performance, the effect of improving positioning accuracy

Inactive Publication Date: 2012-12-05
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

This technology makes the CAPS system must be the same as GPS in terms of modulation mode, spread spectrum code selection, etc., which limits the development of the CAPS system. The supply of chips is restricted by foreign countries; the overhead and power consumption of the software receiver on the computing platform are relatively large, and the signal sampling frequency of the fine code receiver must be at least 40MHz, which is 10 times that of the coarse code, and the conventional data processing platform incompetent
In addition, although the software receiver is convenient for software algorithm development, it cannot perform real-time processing at present.

Method used

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  • CAPS/Big Dipper bimodule receiver

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Embodiment Construction

[0015] Technical solution of the present invention is:

[0016] A CAPS / Beidou dual-mode receiver includes: an antenna module, a radio frequency channel module, a Beidou information processing unit, and a microprocessor unit.

[0017] The antenna module includes a CAPS / Beidou dual-mode antenna (is such an antenna a known prior art? If not, its structure needs to be described.), power splitter, CAPS filter, amplifying unit, Beidou filter, amplify unit. Since the CAPS receiver must simultaneously receive signals from multiple satellites in different directions, it should be an omnidirectional antenna designed with circular polarization. The CAPS / Beidou dual-mode antenna adopts a single-point backfeed mode. The CAPS microstrip patch antenna and the Beidou microstrip patch antenna pass through a metal probe that passes through the dielectric board and the frequency point on the dielectric backplane is at a narrow band low of 4GHz. Noise amplifier and narrowband low noise amplifie...

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Abstract

The invention provides a CAPS (Chinese Area Positioning System)/Big Dipper bimodule receiver. A Big Dipper satellite signal and a CAPS satellite signal are respectively sent to a CAPS filtering and amplifying unit and a Big Dipper filtering and amplifying unit after being simultaneously received by a CAPS/Big Dipper bimodule antenna, and then the CAPS satellite signal is sent to a CAPS RF (Radio Frequency) front end to be processed into a mid-frequency digital signal which is sent to a microprocessor unit; the Big Dipper satellite signal is sent to a Big Dipper RF front end to be processed into a mid-frequency digital signal which is then sent to a Big Dipper information processing unit for catching, tracking, demodulating and decoding, and the decoded information is sent to the microprocessor unit; and the microprocessor unit outputs a position resolving result and a CAPS time pulse according to the CAPS satellite signal. The CAPS/Big Dipper bimodule receiver adopts redundant backup to achieve bimodule timing and positioning, and integrated navigation can greatly improve the system usability and completeness and can even improve the positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, and is a CAPS / Beidou dual-mode receiver for two independent satellite navigation systems of the Chinese regional navigation and positioning system CAPS and the Beidou satellite navigation system. Background technique [0002] The Beidou navigation and positioning system is a regional active three-dimensional satellite positioning and communication system (GNSS) independently developed by China. It is the third mature satellite navigation system after the US GPS and Russia's GLONASS. The system consists of three (two working satellites and one spare satellite) Beidou positioning satellites (Beidou-1), the ground part mainly based on the ground control center, and Beidou user terminals. The Beidou-1 satellite navigation system uses synchronous orbit satellites for navigation and positioning, and also has a strong time service capability. The time service scope includes my country's ter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/33
Inventor 邢燕赵爱萍胡永辉
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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