Multiple-input, multiple-output (mimo) systems with multiple...

H - Electricity – 04 – B

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H04B 7/06 (2006.01) H04L 1/00 (2006.01) H04L 1/06 (2006.01) H04L 27/26 (2006.01) H04B 7/005 (2006.01) H04B 7/04 (2006.01) H04B 7/08 (2006.01)

Patent

CA 2477536

Techniques to transmit data on a number of transmission channels in a multi- channel communication system using multiple transmission schemes requiring less channel-state information (CSI). These schemes may include a partial-CSI transmission scheme that transmits a single data stream on each transmit antenna selected for use and a "beam-forming" transmission scheme that allocates all transmit power to a single transmission channel having the best performance. Each transmission scheme may provide good or near-optimum performance for a specific range of operating conditions (or operating SNRs). These multiple transmission schemes may then be combined in a piece-wise fashion to form a "multi-mode" transmission scheme that covers the full range of operating conditions supported by the MIMO system. The specific transmission scheme to be used for data transmission at any given moment would then be dependent on the specific operating condition experienced by the system at that moment.

L'invention concerne des techniques de transmission de données sur plusieurs canaux de transmission, dans un système de communication à canaux multiples, à partir de plusieurs schémas de transmission, nécessitant moins d'informations d'état du canal (CSI). Ces schémas peuvent comprendre un schéma de transmission à informations d'état du canal partielles, permettant de transmettre un train de données unique sur chaque antenne d'émission sélectionnée, ainsi qu'un schéma de transmission à formation de faisceau permettant d'attribuer toute la puissance de transmission au canal de transmission présentant les meilleures performances. Chaque schéma de transmission peut fournir de bonnes performances ou des performances quasi-optimales pour une gamme spécifique de conditions de fonctionnement (ou de SNR de fonctionnement). Ces schémas de transmission multiples peuvent ensuite être combinés pas à pas pour former un schéma de transmission à modes multiples couvrant une large gamme de conditions de fonctionnement prises en charge par le système MIMO. Le schéma de transmission spécifique utilisé pour la transmission de données à un instant quelconque dépend alors des conditions de fonctionnement spécifiques du système à cet instant donné.

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