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Method and equipment for reporting antenna calibration information and determining antenna calibration factor

一种天线校准、天线的技术，应用在无线通信、分集/多天线系统、信道估算等方向

Active Publication Date: 2011-06-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0043] The technical problem solved by the present invention is to provide a method for reporting antenna calibration information and user equipment, a method for determining antenna calibration factors and a base station to solve the problem of antenna calibration when the reciprocity of the uplink and downlink channels is not established

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  • Method and equipment for reporting antenna calibration information and determining antenna calibration factor
  • Method and equipment for reporting antenna calibration information and determining antenna calibration factor
  • Method and equipment for reporting antenna calibration information and determining antenna calibration factor

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Embodiment Construction

[0074] Multi-antenna technology has become one of the key technologies in the next generation of wireless communication systems. The linear precoding / beamforming technology in multi-antenna technology is an effective means to combat fading channels, reduce error probability, and improve system performance. The TDD system utilizes the reciprocity of the uplink and downlink channels, and the downlink channel information from the base station to the UE can be obtained according to the uplink channel information from the UE to the base station estimated by the base station, so as to calculate the precoding matrix / beamforming weight. However, the uplink and downlink reciprocity is not strictly established in the actual system, and the technical solution provided by the embodiment of the present invention will solve the antenna calibration problem when the uplink and downlink channel reciprocity is not established. In the solution, the amplitude information and phase information (tim...

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Abstract

The invention discloses a method and equipment for reporting antenna calibration information and determining an antenna calibration factor. The method comprises the steps of: when the antenna calibration information is reported, estimating a downlink equivalent baseband channel from multiple antennae of a base station to user equipment by the user equipment; and after an amplitude response and a delay value, to be reported, are determined according to the equivalent baseband channel, reporting the amplitude response and the delay value to the base station. In the determination of the antenna calibration factor, the base station determines the amplitude response and the delay value according to an uplink signal sent by the user equipment on a time frequency resource appointed by the base station, and the base station calculates the antenna calibration factor according to the amplitude response and the delay value, reported by the user equipment, as well as the amplitude response and the delay value, determined by the uplink signal. The technical scheme provided by the invention has decreased sensitive degree to channel estimation errors and channel Doppler spread.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method and equipment for reporting antenna calibration information and determining antenna calibration factors. Background technique [0002] A MIMO (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) system refers to a system in which multiple antennas are installed at both the transmitting end and the receiving end. The MIMO system adds space domain processing on the basis of traditional time-frequency processing, and can further obtain array processing gain and diversity gain. In a MIMO system, if the transmitter can know the channel information in a certain way, the transmitted signal can be optimized according to the channel characteristics, so as to improve the receiving quality and reduce the complexity requirement of the receiver. Linear precoding / beamforming technology is one of the optimization methods, which is an effective means to combat fading cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04B7/06
CPCH04B17/0007H04B17/0067H04B7/0639H04W72/085H04L25/0224H04L5/0023H04L25/0204H04B17/0062H04B7/0626H04L5/0057H04W72/0406H04B17/12H04B17/21H04B17/24H04W72/20H04W72/542H04B7/0417
Inventor 高秋彬孙韶辉缪德山秦飞
Owner DATANG MOBILE COMM EQUIP CO LTD
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