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Acquisition method and system for reference clock signal

A technology of a reference clock signal and an acquisition method, applied in the field of communication, can solve the problems of high installation cost and poor signal quality of the receiver, and achieve the effects of reducing installation cost, small signal attenuation, and low price

Inactive Publication Date: 2012-05-16
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention proposes a reference clock signal acquisition method and system to overcome the problems of poor receiver signal quality and high installation costs when a remote external GPS antenna is required in the current TD base station

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  • Acquisition method and system for reference clock signal
  • Acquisition method and system for reference clock signal
  • Acquisition method and system for reference clock signal

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Embodiment Construction

[0035] The basic idea of ​​the present invention is to realize the transmission of GPS clock signal by optical fiber, and recover the accurate reference clock signal at the receiving end for time synchronization.

[0036] Specifically, the GPS receiving device receives GPS signals, generates TOD (Time Of Day, time of day) signals and 1PPS (1 Pulse Per Second, pulse per second) signals, and converts the TOD signals and 1PPS signals in the form of electrical signals into optical signals The form is sent to the restoration device through optical fiber; the restoration device receives the TOD signal and 1PPS signal in the form of optical signal, restores the TOD signal and 1PPS signal in the form of electrical signal, and compensates the 1PPS signal in the form of electrical signal, and converts the electrical signal The TOD signal in the form and the compensated 1PPS signal are used as the reference clock signal.

[0037] The TOD signal in the form of an electric signal and the c...

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Abstract

The invention discloses an acquisition method and a system for a reference clock signal, wherein the method comprises the following steps of: receiving a GPRS (General Packet Radio Service) satellite signal by GPRS receiving equipment; generating a TOD signal and an IPPS signal, and converting the TOD signal and the IPPS signal with electrical signal forms into optical signal forms, and sending the TOD signal and the IPPS signal with optical signal forms to a reduction device through an optical fiber; receiving the TOD signal and the IPPS signal with optical signal forms by the reduction device, recovering the TOD signal and the IPPS signal with optical signal forms to be the TOD signal and the IPPS signal with electrical signal forms, and compensating the IPPS signal with an electrical signal form, and making the TOD signal with an electrical signal form and the compensated IPPS signal as the reference clock signal. Through the method and the system, an installation distance for a GPRS antenna can be enlarged, and quality for reception for the GPRS satellite signal can be guaranteed; moreover, cost for the optical fiber is cheap, and erection cost for the GPRS antenna can be favorably reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for acquiring a reference clock signal. Background technique [0002] TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access, referred to as TD) network is a system that requires precise time synchronization. At present, most TD base stations are synchronized by installing GPS (Global Positioning System, Global Positioning System) receiving device to achieve synchronization. The GPS receiving device calculates the position information and time information by receiving the signals sent by several satellites, and sends the time of day signal and second pulse signal to the TD base station, and the base station performs time synchronization based on this. [0003] GPS receiving equipment is generally divided into two parts: GPS antenna and receiver. The GPS antenna needs to be set up in an open outdoor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04L7/033
CPCG04G5/00H04J3/0682
Inventor 胡志琥陶发凌晨
Owner ZTE CORP
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