Calibration method for intelligent antenna

A calibration method and technology of smart antennas, applied in the directions of diversity/multi-antenna systems, radio transmission systems, space transmit diversity, etc., can solve the problems of no antenna calibration results, inability to guarantee the service quality of wireless communication systems, and inability to obtain parameters.

Inactive Publication Date: 2009-07-15
TD TECH COMM TECH LTD
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  • Application Information

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Problems solved by technology

[0008] Since the periodic calibration is based on the carrier carried by the RRU, that is, the periodic calibration is for the carrier to provide services normally, and when to establish each carrier on the RRU depends on when the relevant radio network controller (RNC) initiates and communicates with the RRU The corresponding cells are established. However, in the existing periodic calibration scheme, the start time of periodic calibration is set by the operator through the OMC, which may cause the following problems in the periodic calibration of the RRU:
[0010] If the start time of the periodic calibration of the RRU is earlier than the establishment time of the carrier carried on the RRU, the parameter

Method used

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  • Calibration method for intelligent antenna
  • Calibration method for intelligent antenna

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Embodiment 1

[0071] The smart antenna calibration method provided in this embodiment is applicable to any wireless communication system composed of a BBU and an RRU, where the initial calibration and periodic calibration are implemented through the RRU. In this embodiment, it is assumed that an initialization calibration flag is set for each RRU in the BBU in advance, and the initialization calibration flag is used to indicate whether the corresponding RRU has been initialized and calibrated.

[0072] figure 2 It is a schematic flowchart of a calibration method for a smart antenna in Embodiment 1 of the present invention. see figure 2 , the method includes:

[0073] Step 201: The BBU receives a request to establish a carrier on a certain RRU.

[0074] Step 202: The BBU judges whether the RRU has been initialized and calibrated according to the initialization calibration flag of the RRU. If the RRU has not been initialized and calibrated, perform step 203; otherwise, perform step 206. ...

Embodiment 2

[0088] The smart antenna calibration method provided in this embodiment is applicable to any wireless communication system composed of a BBU and an RRU, where initial calibration and periodic calibration are implemented through the BBU. In this embodiment, it is assumed that an initialization calibration flag is set for each RRU in the BBU in advance, and the initialization calibration flag is used to indicate whether the corresponding RRU has been initialized and calibrated.

[0089] image 3 It is a schematic flowchart of the calibration method of the smart antenna in the second embodiment of the present invention. see image 3 , the method includes:

[0090] Step 301: The BBU receives a request to establish a carrier on a certain RRU.

[0091] Step 302: The BBU judges whether the RRU has been initialized and calibrated according to the initialization calibration flag of the RRU. If the RRU has not been initialized and calibrated, perform step 303; otherwise, perform step...

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Abstract

The present invention discloses a method for calibrating intelligent antenna. When a baseband pool unit (BBU) receives a request for establishing a cell carrier on a remote radiofrequency unit (RRU), the following steps are executed: A. determining whether the RRU is executed with initialization calibration, if the RRU is not executed with the initialization calibration, continuing for executing the step B, otherwise continuing for executing step C; B. executing initialization calibration to the RRU; C. establishing a corresponding cell carrier on the RRU according to the request for establishing cell carrier; and D. after the cell carrier is successfully established, executing a first periodic calibration to the corresponding cell carrier channel, and executing periodic calibration to the cell carrier channel according to the collocated calibrating period. The application of the invention can trigger the initialization calibration and periodic calibration in time for guaranteeing the service quality of wireless communication system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a calibration method for a smart antenna. Background technique [0002] In the third-generation mobile communication system, smart antennas are widely used, and in the smart antenna technology, the calibration of the transmitting path and receiving path of the smart antenna is a key link. The calibration of the smart antenna can be divided into two steps: initial calibration and periodic calibration, also called pre-calibration and real-time calibration. The following sections of this document use the terms uniformly: initial calibration and periodic calibration. [0003] The initial calibration is mainly used to obtain the compensation coefficient of each antenna unit relative to the calibration antenna unit in the transmitting direction and receiving direction; the periodic calibration is to perform transmission calibration and reception calibration on each ante...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04B1/707H04B7/216H04B17/12
CPCH04B17/11H04B17/21
Inventor 魏菊霞李蓉熊强邓实颖
Owner TD TECH COMM TECH LTD
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