Data synchronization method for antenna to calibrate radio frequency far-end unit terminal

A radio frequency remote unit, antenna calibration technology, applied in the direction of electrical components, multiplex communication, communication between multiple stations, etc., can solve the problem of inflexibility, scalability, inability to track and adjust in time, Poor flexibility and other problems, to achieve the effect of good consistency, short response time and good accuracy

Active Publication Date: 2008-09-03
WUHAN HONGXIN TELECOMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This method has the following disadvantages: the error is relatively large, and when the data phase difference is close to 2π, the theoretical maximum error is one chip; the RF remote unit receives the frame header and the data position will change after each restart, and cannot track and match in time. Adjustment, less flexibility
But now there are very few chips that can achieve this function, and they do not have the characteristics of flexibility and scalability.

Method used

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  • Data synchronization method for antenna to calibrate radio frequency far-end unit terminal
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  • Data synchronization method for antenna to calibrate radio frequency far-end unit terminal

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and example, the present invention will be further described.

[0023] Aiming at the possible lead or lag of data out of synchronization, the method proposed by the present invention automatically detects the lead or lag of data according to the threshold set by the system, and performs corresponding delay compensation to make the data synchronized.

[0024] Such as figure 1 As shown, since the RF remote unit can only recover the optical fiber interface data-associated clock (generally 61.44MHz, 122.88MHz or 245.76MHz) from the optical fiber link, and the basic rate of the RF data is 1X, it needs to be based on this The fiber link recovers the clock and demultiplexes the carrier data of each antenna to recover the 1X rate data.

[0025] The local 1X clock is provided by the middle radio frequency part, and the 1X data recovered from demultiplexing must be synchronized with the local 1X clock to ensure the correct operation...

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Abstract

The invention provides a data synchronization method used in far-end unit end of antenna calibration radio frequency, which can automatic detect the lead or lag of data, perform the corresponding delay compensation and data synchronization based on a preset threshold value aiming at the two possible situations of lead or lag in data asynchrony.

Description

technical field [0001] The invention relates to the antenna calibration of the TD-SCDMA system, more precisely to a data synchronization technology of the radio frequency remote unit during the antenna calibration process of the baseband unit (BBU) and the radio frequency remote unit (RRU). Background technique [0002] In the existing TD-SCDMA system, the baseband unit and the radio frequency remote unit can use remote radio technology to form a network, and an optical fiber communication interface is used between them. The baseband unit completes the baseband processing function, and the radio frequency remote unit completes the intermediate frequency And the function of the radio frequency part. Adopting this networking method not only effectively reduces the system cost, but also increases the system flexibility and has the advantages of high coverage. [0003] Because the TD-SCDMA system uses smart antennas, amplitude and phase differences will be introduced at the rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J3/06
Inventor 王健李大庆
Owner WUHAN HONGXIN TELECOMM TECH CO LTD
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