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Apparatus and method for calibrating channel in radio communication system using multiple antennas

A wireless communication system and multi-antenna technology, applied in diversity/multi-antenna systems, wireless communication, radio transmission systems, etc., can solve problems such as excessive time and waste of resources

Inactive Publication Date: 2007-06-13
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This wastes a lot of resources
Also, it takes too much time to obtain the information necessary for calibration

Method used

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  • Apparatus and method for calibrating channel in radio communication system using multiple antennas
  • Apparatus and method for calibrating channel in radio communication system using multiple antennas
  • Apparatus and method for calibrating channel in radio communication system using multiple antennas

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Embodiment Construction

[0048] Preferred embodiments of the present invention will be described herein below with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention with unnecessary detail. Also, the terms used herein are defined according to the functions of the present invention. Therefore, terms may differ depending on user's or operator's purpose and usage. That is, the terms used herein must be understood based on the descriptions done here.

[0049] The present invention provides a scheme for calibrating and estimating CSI in a TDD-MIMO wireless communication system, which will be described in detail. In particular, the present invention provides a scheme for calibrating CSI using minimal resources and time.

[0050] In the following description, 'downlink (DL)' indicates a direction from a transmitter performing calibration to a receiver, and 'uplink (UL)' indicates a ...

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Abstract

Provided is an apparatus and method for calibrating a channel in a radio communication system using multiple antennas. A base station apparatus for the radio communication system includes a channel estimator and a calculator. The channel estimator receives a UL (Uplink) sounding signal to estimate a first UL CSI (Channel State Information) and receives a UL sounding signal weighted with a DL (Downlink) CSI to estimate a second UL CSI. The calculator calculates calibration values for the respective antenna pairs using the first UL CSI and the second UL CSI. Information necessary for channel calibration is transmitted and received in an analog format. Accordingly, it is possible to minimize the waste of resource and time necessary for channel calibration.

Description

[0001] Cross References to Related Applications [0002] This application claims the title "Apparatus and Method for Calibrating Channel in Radio Communication System Using Multiple Antennas" filed at the Korean Intellectual Property Office on September 16, 2005, And priority is assigned to application Serial No. 2005-86881, the contents of which are hereby incorporated by reference. technical field [0003] The present invention generally relates to a time division duplex multiple-input multiple-output (TDD-MIMO) wireless communication system, and in particular to a device and method for calibrating and estimating a channel in a wireless communication system. Background technique [0004] In a general TDD-MIMO wireless communication system, the downlink (DL) channel and uplink (UL) channel in the air correspond to each other, but the DL channel state information (CSI) and UL CSI detected at the actual baseband level are not correspond to each other. The reason for this is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04Q7/30H04Q7/32H04L25/02H04L5/14H04B7/04H04B7/06H04J11/00H04J99/00H04W16/28H04W28/18
CPCH04L5/1469H04L25/0224H04B17/24H04B17/0067H04B7/0413H04L25/0204
Inventor 黄瑾喆崔嵩润蔡赞秉南承勋
Owner SAMSUNG ELECTRONICS CO LTD