Method and apparatus for antenna selection in a MIMO system

An antenna and wireless communication technology, applied in the field of antenna selection and equipment used in MIMO systems, can solve problems such as complex calculations and achieve the effect of good radio resources

Inactive Publication Date: 2011-02-23
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A problem that often arises in MIMO solutions is configurations where there are more antennas than available power amplifiers, which may be the case, for example, for laptops with built-in wireless communications
But this solution is complex and requires communication overhead and a lot of computation

Method used

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  • Method and apparatus for antenna selection in a MIMO system
  • Method and apparatus for antenna selection in a MIMO system
  • Method and apparatus for antenna selection in a MIMO system

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Embodiment Construction

[0048] exist figure 1 In , reference numeral 1 generally indicates a base station or similar wireless access gateway (eg access point) to the infrastructure communication network 2 . The base station 1 is arranged to communicate with user equipment 3 wirelessly. The base station also comprises a radio controller 4 for controlling wireless communications and for controlling communications with the infrastructure network 2 . The base station 1 may comprise multiple antennas and / or the multiple base stations may be controlled by a radio controller 4 . It should be noted that the exact configuration of the base stations is not critical to the invention, as long as there are multiple antennas and means to control radio resources, as will become apparent later in the text.

[0049] exist figure 2 Shown in is a system with a communication device 4 (for example a radio controller in a base station, a radio network controller or a terminal device (UE)) implementing the solution acc...

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Abstract

The present invention relates to a solution for efficient handling of radio resources in communication devices in a wireless communication network. In the solution a subset of available antennas to be used is chosen using a method for determining a singular valued metric from a sub matrix related to a full channel matrix. Sub-channel matrices are chosen by deducing the metric and comparing to other sub-matrices. Preferably the best sub-channel matrix is used to determine a suitable full channel matrix to use in communication and this full channel matrix is communicated to each involved communication device.

Description

technical field [0001] The present invention relates to a solution for optimizing the use of antennas in a MIMO system, and in particular to a solution for selecting which antennas to use in a MIMO system given a specific configuration in a communication network. Background technique [0002] In a MIMO (Multiple Input Multiple Output) system, multiple antennas are used for transmitting and receiving radio signals in order to improve the performance of the radio communication system by providing different types of diversity. A problem that often exists in MIMO solutions is configurations where there are more antennas than available power amplifiers, which may be the case eg for laptop computers with built-in wireless communication. [0003] MIMO coding can be divided into three main categories: precoding, multiplexing, and diversity coding. [0004] Precoding means transmitting the same signal from each transmit antenna with suitable phase weighting in order to provide beamf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/08H04B7/04H04B7/06
CPCH04B7/0691H04B7/04H04B7/0874
Inventor U·林德格伦M·科尔德雷F·哈里森S·彼得森
Owner TELEFON AB LM ERICSSON (PUBL)
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