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Antenna arrangement for multi-input multi-output wireless local area network

A wireless antenna, antenna technology, applied in diversity/multi-antenna system, antenna, combination of antenna units with different polarization directions, etc.

Inactive Publication Date: 2013-05-08
AGERE SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has never been a proposal in the prior art to allow MIMO wireless networks to operate efficiently and optimally in both line-of-sight and non-line-of-sight channel conditions

Method used

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  • Antenna arrangement for multi-input multi-output wireless local area network
  • Antenna arrangement for multi-input multi-output wireless local area network
  • Antenna arrangement for multi-input multi-output wireless local area network

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Embodiment Construction

[0012] The present invention is applied to products based on the wireless local area network (WLAN) standard IEEE 802.11a / g and the future WLAN standard IEEE 802.11n. According to the principles of the present invention, problems caused by Line-of-Site (LOS) communication in MIMO based on WLAN networks can be overcome. This low-cost solution then provides significant performance improvements when experiencing communications in LOS conditions. Furthermore, the present invention does not degrade performance when communications are in non-LOS states. The invention can be used to supplement a standard-compliant product without impairing the product's compatibility with the standard.

[0013] figure 1 A simplified block diagram is shown for a wireless system including, for example, a wireless local area network (WLAN). The figure shows a transmitter site in communication with a receiver site. In practice, the transmitter and receiver sites are usually transceiver sites, where e...

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Abstract

Line-of-sight and non-line-of-sight channel conditions are efficiently and optimally handled in a MIMO wireless network by coupling two or more dual polarization antennas together through a controller that selects a prescribed combination of antenna outputs in response to determination of the existence of a particular channel condition. In this manner, the controlled antenna array develops a suitable level of signal discrimination (decorrelation), whether or not the channel condition provides it. In one embodiment, two dual polarized antennas are separated from each other and have their dual polarization output signals coupled to the same switching element so that the orthogonal outputs from an antenna are available at the same switching element. A controller selects a particularly polarized output signal from each antenna based on a predetermined criterion.

Description

technical field [0001] The present invention relates to an antenna arrangement for use in a wireless network and in particular to the controlled use of a dual polarized antenna array to improve line-of-sight signal reception in a wireless network such as a local area network. Background technique [0002] Multiple-Input Multiple-Output (MIMO) systems are suitably designed to take advantage of the spatial diversity provided by multiple channels between transmitters and receivers in a wireless network. Independent multipath propagation ensures the existence of space diversity and the expected performance of MIMO systems. The multipath signal components virtually increase the antenna array aperture and ensure that the channel matrix is ​​reversible. When the transmitter and receiver operate in non-line-of-sight channels, the multipath conditions required for MIMO exist. MIMO is poorly immune to significant performance degradation when the transmitter and receiver operate on l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/24H01Q9/06H04J99/00
CPCH04B7/10H01Q9/06H01Q21/245H04B7/0413
Inventor 伊莎贝拉·莫多尼斯蒂姆·申克陶晓角
Owner AGERE SYST INC
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