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System and its method for obtaining reference clock in frequency-shift repeater

A technology of reference clock and repeater, applied in the field of frequency shift repeater, can solve the problems of inconvenient maintenance, high system cost and high maintenance cost, and achieve the effects of reduced maintenance cost, high frequency accuracy and simplified maintenance operation.

Active Publication Date: 2009-09-30
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] In practical application, the above-mentioned solution has the following problems: For the case of large frequency shift frequency deviation in the existing technical solution, it is necessary to use an OCXO with high stability, and the system cost is relatively high; at the same time, in order to maintain the frequency stability of long-term work, It is also necessary to periodically calibrate the OCXO, requiring additional maintenance personnel, which is not easy to maintain and the maintenance cost is also high

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  • System and its method for obtaining reference clock in frequency-shift repeater
  • System and its method for obtaining reference clock in frequency-shift repeater
  • System and its method for obtaining reference clock in frequency-shift repeater

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Embodiment Construction

[0043] First explain the gist of the present invention, the present invention obtains the reference frequency signal synchronized with the base station reference clock, and synchronizes the reference clock of the master station or slave station of the frequency shift repeater to the reference clock used by the base station according to the reference frequency signal , and use the reference clock synchronized with the reference clock of the base station to generate the local oscillator signal for frequency mixing, so as to ensure that the frequency errors introduced by the frequency shift transformation of the master station and the slave station are completely equal to realize the cancellation of the frequency error, and make the master station and the slave station The frequency error is synchronized with the base station for good frequency accuracy.

[0044] Among them, the master station can demodulate the received downlink signal sent by the base station, and obtain the fre...

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Abstract

The invention relates to mobile communication technology, and discloses a system and method for obtaining a reference clock in a frequency-shifting repeater, which extracts information related to the reference clock of the base station in the transmitted signal of the base station, and converts the frequency-shifting repeater master station and slave station The reference clock of the base station is synchronized to the reference clock used by the base station, which makes the cost of the frequency shift repeater lower and the maintenance more convenient.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to frequency shift repeater technology in mobile communication. Background technique [0002] With the rapid development of mobile communication today, no matter what kind of wireless communication coverage area will produce weak signal areas and blind areas, and for some remote areas and blind areas with a small number of users, the cost of setting up analog or digital base stations is too high, and the infrastructure It is also more complicated. In this case, a cost-effective device with low cost and simple erection, but with the function of a small base station is required. Since the repeater can ensure network coverage without increasing the number of base stations, and its cost is far lower than that of the microcellular system with the same effect, the repeater is an optimal solution to extend the coverage of the mobile communication network. Compared with the base station, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/15H04Q7/30
Inventor 李挺钊
Owner HUAWEI TECH CO LTD