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Virtual MIMO system and apparatus thereof

A mobile communication system and coefficient technology, applied in the field of virtual MIMO system, can solve problems affecting the performance and quality of virtual MIMO system

Inactive Publication Date: 2009-07-01
ALCATEL LUCENT SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The characteristics and parameters of the channels between mobile devices and base station antennas within a virtual MIMO system can vary widely, which can significantly affect the performance and quality of the virtual MIMO system they have formed

Method used

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  • Virtual MIMO system and apparatus thereof
  • Virtual MIMO system and apparatus thereof
  • Virtual MIMO system and apparatus thereof

Examples

Experimental program
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Embodiment Construction

[0028] figure 1 A block diagram of a mobile communication system 100 comprising a plurality of mobile stations 101 , a base station 102 and a first base station antenna 103 and a second base station antenna 104 is shown. A plurality of mobile stations 101 are active and coupled to a base station 102 . Base station 102 periodically receives pilot symbols from mobile stations that are used to obtain or update channel estimation coefficients.

[0029] If the base station 102 needs to increase the transmission throughput or capacity of the entire cell, a virtual MIMO system can be used in order to share resources of two or more mobile devices. To do so, the base station 102 needs to evaluate and calculate the best possible grouping combination or pairing for each active mobile device within the cell of the base station 102 . The first step to calculate the set of multiple virtual MIMO systems is to discard all mobile devices that do not meet the virtual MIMO system criteria. Th...

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Abstract

The invention relates to a method of evaluating a virtual MIMO system's quality of a first group of mobile devices in a base station of a mobile communication system. The mobile communication system further comprises a plurality of mobile devices coupled to the base station, the base station is adapted for receiving uplink channel estimation coefficients of each mobile device of the plurality of mobile devices. The method comprises the steps of: selecting at least a first and second mobile device of the plurality of mobile devices; obtaining a first factor by calculating an inverse correlation between a first and a second vector; obtaining a second factor, the second factor being descriptive of an average receive power ratio between the first and second mobile devices; calculating the quality value of the virtual MIMO by combining the first factor and the second factor using an arithmetic operation, the quality value being descriptive of the virtual MIMO system's quality between the first and second mobile devices.

Description

technical field [0001] The present invention relates to a virtual MIMO system in a mobile communication system, and more particularly, but not limited to, a method and a base station for evaluating the quality of a virtual MIMO system. Background technique [0002] In wireless technology, multiple-input and multiple-output, or MIMO, defines the use of multiple antennas at the transmitter and receiver in order to improve communication performance. Additionally, it increases data throughput and link range without additional bandwidth or transmit power. One of the main functions of MIMO lies in the spatial multiplexing of a high-rate signal split into multiple lower-rate streams, each stream being transmitted from different transmit antennas in the same frequency channel. A MIMO channel can be modeled as a matrix channel with several transmit streams passing through multiple paths between multiple transmit antennas at the transmitter and multiple receive antennas at the receiv...

Claims

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Application Information

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IPC IPC(8): H04W16/22H04W24/06H04B7/04H04B1/707
CPCH04L1/20
Inventor T·维尔德C·霍克
Owner ALCATEL LUCENT SAS
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