Mitsubishi Electric Corporation

Orange

Mitsubishi Electric R&d Centre Europe B.v.

Akl Charaf

Laurent Cariou

Qianrui Li

Jean-Christophe Sibel

Artem Boryskin

A method evaluates channel information of a database, DB, the DB channel information being associated to a target area and being representative of expected characteristics of a wireless communication channel in the target area to be provided to one or more communication devices. The method includes: obtaining, by a processing circuit, all or part of the DB channel information from the database; obtaining, by the processing circuit, observed channel information representative of characteristics of the wireless communication channel experienced by a first communication device in the target area; computing, by the processing circuit, a reliability indicator for the DB channel information for the target area, by comparing the DB channel information and the observed channel information and determining a timing information for the reliability indicator.

Method for evaluating channel information of database, communication device, database, and wireless communication system

A frame transmission method is provided for use in a multiuser MIMO system having a transmitter with a plurality of antennas and receivers that are respectively associated with users. The method includes: constructing a sounding frame in which a first portion has at least one symbol for synchronizing destination receivers and a second portion has at least as many pre-coded pilot symbols as there are destination receivers; transmitting the sounding frame in a broadcast mode for its first portion and in a directional mode for its second portion to each of the destination receivers; and constructing a respective data frame for sending to each of the destination receivers by taking account of feedback information coming from the destination receivers and, for each destination receiver, coding interference between destination receivers.

Method of transmitting frames, and corresponding stations and computer program

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Rennes, France

Akl Charaf