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Method for locking clock of base station and device thereof

A clock and base station technology, applied in the field of base station clock locking methods and devices, can solve problems such as long time

Inactive Publication Date: 2010-12-29
北京万海云科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, the current PLL frequency adjustment uses first-order linear adjustment, and most OCXOs do not have high linearity. Although the frequency can be locked after multiple iterations, it often takes a long time

Method used

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  • Method for locking clock of base station and device thereof
  • Method for locking clock of base station and device thereof
  • Method for locking clock of base station and device thereof

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0041] The core idea of ​​the present invention is: in the frequency adjustment stage of the base station clock, according to the crystal oscillator (such as OCXO, etc.) is nonlinear in the entire adjustment range, but can be considered to have the characteristics of linearity in a small adjustment range, firstly use the binomial The fitting method obtains a small adjustment range, and then the first-order linear adjustment method is used to adjust the crystal oscillator within the small adjustment range, which greatly improves the locking speed of the clock frequency.

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In the embodiments of the present invention, the crystal oscillator is described by taking OCXO as an example.

[0044] In the frequency adjustment stage, after the OCXO is p...

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Abstract

The invention discloses a method for locking a clock of a base station and a device thereof. In the method, in a step of adjusting the frequency of the clock of the base station, due to the fact that a crystal oscillator (such as an OCXO and the like) has the characteristics of non-linearity in the whole adjusting range and linearity in a smaller adjusting range, firstly, the smaller adjusting range can be acquired by adopting a binomial fitting mode; and then, the crystal oscillator can be adjusted by adopting a first order linear adjusting mode in the smaller adjusting range. The technical scheme greatly improves the locking speed of the clock frequency of the base station.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a base station clock locking method and device. Background technique [0002] In a Time Division Multiplexing Synchronous Code Division Multiple Access (TD-SCDMA, Time Division Synchronous CDMA) system, when the base station obtains the clock reference of the second pulse (1PPS, 1Pulse Per Second) locked by the Global Positioning System (GPS, Global Position System), It is necessary to quickly lock the reference, and lock the rising edge of the local 1PPS clock signal of the base station and the 1PPS clock signal of the GPS within a small error range, and at the same time control the phase of the clock output by the Oven Controlled Crystal Oscillator (OCXO) It is also locked within a small error range. [0003] figure 1 It is a schematic diagram of the composition and structure of the clock locking components in the existing base station. Such as figure 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/08
Inventor 王超鲁雪峰
Owner 北京万海云科技有限公司