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Big dipper multi-mode time service receiving device

A receiving device, Beidou technology, applied in the field of mobile communication and satellite positioning and navigation

Active Publication Date: 2010-09-22
张建城
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to coordinate the design of Beidou II, multi-system compatible timing active antenna and radio frequency receiver module, and adopt the integrated design scheme of radio frequency reception to ensure that the existing mobile communication base station can receive different satellite navigation timing at the same time signal, strive to get rid of the dependence on a single satellite navigation system, and improve the security, reliability and autonomy of my country's mobile communication system network

Method used

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  • Big dipper multi-mode time service receiving device

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The broadband timing active antenna circuit consists of a broadband ceramic dielectric antenna 101, a pre-filter 102, a low-noise field-effect amplifier 103, a broadband filter 104, a single-chip low-noise amplifier 105, a lightning protection surge circuit 106, and a power supply regulator Circuit 107, double-sided printed copper clad laminates containing microstrip circuits, N-type pin electrical connectors, etc. The working principle is: broadband ceramic dielectric antenna 101 receives timing carrier signals from GPS, Galileo and "Beidou II" satellites, Filtered by the pre-filter 102 to ensure 1550 to 1580MHz out-of-band rejection, and then sent to the low-noise field-effect amplifier 103 for amplification, the amplified broadband signal enters the broadband filter 104, forming a center frequency of 1570MHz, covering 1561.098MHz and 1575.42MHz at the same time Carrier signal, or use staggered tuning to multi-frequency point broadband filter, and then amplified by a s...

Embodiment 2

[0035] The technical solution is to use software technology to demodulate the multi-mode timing signal. In order to cover the timing of the four existing satellite navigation systems, the wideband timing active antenna receiving bandwidth is expanded to 1620MHz, and the GLONASS narrowband is added to the multi-mode radio frequency receiver module. Filter 201, its center frequency is 1602.56MHz bandwidth 10MHz; Before mixer 202, a multimode signal selector 209 is set, and the main function of this selector 209 is to detect the high frequency signal input level of input radio frequency receiver , or demodulate by the default timing signal, and select the stronger timing signal and smaller pulse code distortion as the main timing signal through comparison and judgment; The level detector 210 is responsible for monitoring, and correspondingly, the programmable intermediate frequency integrated filter 211 makes corresponding intermediate frequency frequency points and frequency band...

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Abstract

The invention relates to a big dipper multi-mode time service receiving device which consists of a broadband time service active antenna and a multi-mode radio frequency receiving module. The technical scheme has no need of arranging a plurality of special frequency band time service antennas according to the navigation satellite and the frequency band. The radio frequency receiving module does not adopt the time multiplexing technology to frequently switch the local frequency and the medium-frequency filtering frequency point, also does not adopt the tunable method to switch the frequency band and the multi-channel demodulating method, but adopt the software technology to control the programmable medium-frequency filter to automatically select a main spare time service signal through a storage control processor, thereby ensuring the transmission demodulating quality. In the invention, as the time service active antenna and the radio frequency receiving module are integrated in a whole, the provided latest circuit design and structure not only can enhance the flexibility and reliability of multi-mode time service, but also can be favorable for reducing the reforming cost of switching single-mode time service into multi-mode time service of the traditional CDMA and TD-SCDMA mobile communication base stations.

Description

technical field [0001] The invention relates to a satellite positioning and navigation multi-mode timing receiving device, which is especially suitable for timing synchronization of CDMA, CDMA2000, TD-SCDMA and other mobile communication stations, and belongs to the field of mobile communication and satellite positioning and navigation. Background technique [0002] In modern mobile communication systems, especially CDMA, CDMA2000 and TD-SCDMA mobile communication systems, the wireless interface of the entire cellular system is required to be synchronized to the same standard time, which is generally provided by satellite positioning and navigation systems or wired cables , due to the high timing accuracy and small time delay of satellite positioning and navigation systems, satellite timing is often used in these mobile communication devices. However, with the establishment of multiple international satellite navigation systems, except for the GPS satellite navigation system o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H04B1/16G01S5/02G01S1/04H01Q1/24
Inventor 张建城
Owner 张建城
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