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multi-antenna device

A multi-antenna, antenna technology, used in radio transmission systems, radio relay systems, active electrical relay systems and other directions

Active Publication Date: 2016-03-30
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] To solve the problem of suppressing self-interference between the output and the input of a multi-antenna device such as a repeater, without the aforementioned drawbacks of reduced capacity or the use of orthogonal polarizations

Method used

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Embodiment Construction

[0048] The invention will now be described with reference to the accompanying drawings.

[0049] Hereafter, vectors are in bold and italics in the description. Matrices are indicated in italic capital letters. Matrix indexing in formulas follows Matlab notation.

[0050] figure 1 An example of a multiple-input multiple-output (MIMO) communication channel is schematically shown, where a transmitter Tx has three output antennas T x1 -T x3 , and the receiver Rx has three input antennas R x1 -R x3 . In this example there is one data stream per antenna, in other examples several data streams can be mixed on the same antenna. This mixing of data streams is called precoding and can be used for beamforming purposes, for example. Antenna T x1 send signal to each R x1 , R x2 and R x3 antenna. Channel coefficient h 11 defined in T x1 with R x1 attenuation and phase shift between. Channel coefficient h 12 defined in T x1 with R x2 The attenuation and phase shift betwee...

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PUM

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Abstract

The invention provides a method for self-interference suppression in a multi-antenna device that is part of a communication channel between a transmitter and a receiver of a wireless communication system. The communication system uses the multi-antenna device, the multi-antenna device is located between the transmitter and the receiver and uses antennas and a relay unit forwarding signals from the transmitter to the receiver. The communication channel has a transmit channel, defined by a transmit channel matrix between the transmitter and the multi-antenna device, a receive channel defined by a receive channel matrix, between the multi-antenna device and the receiver and a self-interference channel between an output and an input side of the multi-antenna device. The self-interference channel is defined by a self-interference channel matrix wherein the method comprises the steps of: • quipping the multi-antenna device with at least three antennas and; • suppressing the self-interference channel by using at least one filtering matrix arrangement being inserted between the antennas and the relay unit. The invention also provides a node in a wireless communication system comprising the multi-antenna device for self-interference suppression in the multi-antenna device module that is part of a communication channel.

Description

technical field [0001] The invention relates to the field of multi-antenna repeaters intended to receive, possibly boost and retransmit signals, operating between a transmitter and a receiver. Background technique [0002] Repeaters are used between the transmitter and the receiver, otherwise, the received signal at the receiver would be too weak. When referring to the term repeater, it can be an amplify and forward (AF) repeater, sometimes called a repeater, or it can be a decode and forward (DF) repeater. In the literature we can also find relays with functionality between AF and DF, and one such example is an estimate and forward (EF) relay. [0003] A known problem with repeaters is self-interference caused by poor isolation between the output and input of the repeater. Self-interference will severely limit the performance of the repeater. For example, the amplification gain of an AF repeater and the detection performance of a DF repeater are both limited by isolation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/155H04B7/15
CPCH04B7/15564
Inventor M.克尔德里F.阿特利
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD