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Time-space processing of radio system with multiple transmit-receive antennas

An antenna and receiver technology, applied in the field of wireless communication, can solve problems such as performance degradation and capacity reduction

Inactive Publication Date: 2002-03-13
LUCENT TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If these signals are correlated to some degree, and this correlation is ignored, performance is degraded and capacity is reduced

Method used

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  • Time-space processing of radio system with multiple transmit-receive antennas
  • Time-space processing of radio system with multiple transmit-receive antennas
  • Time-space processing of radio system with multiple transmit-receive antennas

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Embodiment Construction

[0010] The following merely illustrates the principles of the present invention. It will thus be appreciated that those skilled in the art will be able to devise various arrangements which, although not explicitly described or shown herein, embody the principles of the invention and are included within its spirit and scope. In addition, all the examples and conditional language enumerated here are mainly used for illustration to help readers understand the principles of the present invention and the concepts formed by the inventors, and should not be considered as being limited to such specifically enumerated examples and conditions. Additionally, all statements herein reciting principles, aspects, and embodiments of the invention, as well as specific examples, include both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents and equivalents developed in the future, ie, any elements developed...

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Abstract

Improved signals are developed for use in a wireless system with multiple transmit and multiple receive antennas so that even in the face of some correlation the most open-loop capacity that can be achieved using a substantially open-loop system with a channel of that level of correlation is obtained. In accordance with the principles of the invention, the signals transmitted from the various antennas are processed so as to improve their ability to convey the maximum amount of information. The data to be transmitted is divided into M+1 substreams, where M is the number of transmit antennas. Each transmit antenna is supplied with a combination signal that is made up of a weighted version of a common one of the substreams and a weighted version of a respective one of the substreams that is supplied uniquely for that antenna, so that there are M transmit signals.

Description

technical field [0001] The present invention relates to wireless communication technology, and in particular to a wireless communication system using multiple antennas at the transmitter and multiple antennas at the receiver, namely the so-called multiple-input multiple-output (MIMO) system. Background technique [0002] It is well known in the art that multiple-input multiple-output (MIMO) systems can achieve significantly improved capacity over single antenna, ie, single antenna to single antenna or multiple antenna to single antenna systems. However, to obtain this improvement, it is desirable to have a good scattering environment such that the various signals reaching the multiple receive antennas are completely uncorrelated. If these signals are correlated to some degree, and this correlation is ignored, performance is degraded and capacity is reduced. Contents of the invention [0003] We have invented a way of improving the signal in a MIMO system such that even in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/00H04B7/04H04B7/06H04B7/08
CPCH04B7/0837H04B7/0626H04B7/0697H04B7/0634H04B7/065H04B7/04
Inventor 安吉尔·乐扎诺法勒克·拉西德-法勒西莱纳德·A·瓦林泽拉
Owner LUCENT TECH INC
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