Method, antenna array, computer program and computer program product for obtaining at least one calibration parameter

A computer program, technology of antenna arrays, applied in the field of antenna arrays

Inactive Publication Date: 2013-07-31
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another drawback is the need to insert dedicated calibration periods into regular radio traffic

Method used

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  • Method, antenna array, computer program and computer program product for obtaining at least one calibration parameter
  • Method, antenna array, computer program and computer program product for obtaining at least one calibration parameter
  • Method, antenna array, computer program and computer program product for obtaining at least one calibration parameter

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Embodiment Construction

[0041] Now, the invention will be described more fully hereinafter with reference to the accompanying drawings showing certain embodiments of the invention. However, the present invention can be implemented in many different forms and should not be regarded as limited to the embodiments described herein; on the contrary, these embodiments are provided as examples so that this disclosure will be comprehensive and complete, and the scope of the present invention will be comprehensive. Convey to those skilled in the art. Similar reference numerals indicate similar elements throughout the description.

[0042] Overview

[0043] The purpose of the embodiments herein is to provide a general autonomous online calibration for an antenna array, that is, a calibration that can be performed periodically without requiring the intervention of an operator during normal business operations involving different access technologies such as FDD and TDD. In addition, the problem of the characterizat...

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Abstract

It is presented a method for obtaining a calibration parameter for an antenna array. The antenna array comprises a first and a second radio module with respective associated antennas, wherein both radio modules comprise a main transmitter and a connected calibration receiver or both radio modules comprise a main receiver and a connected calibration transmitter. The method comprises: injecting a first calibration signal in the first radio module and measuring a first response to the first calibration in the first radio module. This injecting and measuring is repeated for all combinations of the first and second radio modules. Finally, a numerical value is calculated using the responses; a calibration parameter is calculated based on the calculated numerical value. A corresponding antenna array, computer program and computer program product are also presented.

Description

Technical field [0001] The embodiments herein relate to antenna arrays, and more specifically, to obtain at least one calibration parameter for the antenna array. Background technique [0002] The increased demand for capacity in cellular systems has prompted the 3GPP (Third Generation Partnership Project) mobile system standard to evolve to LTE (Long Term Evolution) and LTE Advanced. This opens the door to the use of more advanced antenna technology. Specifically, antenna array technologies such as MIMO (Multiple Input Multiple Output) or beamforming are often applied. [0003] Antenna arrays have previously been used in radar and satellite communications applications. In order to form a beam, the antenna array needs to be phase aligned or calibrated at the antenna port. This is often a time-consuming and expensive measurement process performed once in the antenna measurement range before deployment. However, commercial antennas in the mobile radio industry have driven the nee...

Claims

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Application Information

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IPC IPC(8): H01Q3/26H04B17/00
CPCH04B17/0062H04B17/0012H01Q3/267H04B17/0007H04B17/12H04B17/14H04B17/21
Inventor H.马尔姆奎斯特L.雷克斯贝格
Owner TELEFON AB LM ERICSSON (PUBL)
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