Transmit diversity method and system

H - Electricity – 04 – B

Patent

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Details

H04B 7/06 (2006.01) H04L 1/06 (2006.01) H04L 1/16 (2006.01) H04B 7/005 (2006.01)

Patent

CA 2371384

The invention relates to a transmit diversity method for a wireless communication system comprising a transmitting element and at least one receiver, wherein a transmission signal is transmitted from the transmitting element to the at least one receiver in accordance with a weight information determined in response to a feedback information. The feedback information is derived from the response at the at least one receiver to the transmission signal, and is fed back using multiplexed feedback signals. Multiple feedback signal quantization constellations and/or constellation specific feedback subchannels can be used for channel probing, such that the total feedback resolution and robustness can be enhanced, while maintaining low signaling capacity of the feedback channel.

L'invention concerne un procédé d'émission en diversité pour un système de communication sans fil comprenant un élément d'émission et au moins un récepteur. Un signal d'émission est émis par l'élément d'émission au récepteur en fonction d'informations de pondération déterminées en réponse à des informations de retour. Ces dernières, qui dérivent de la réponse du récepteur au signal d'émission, sont retournées au moyen de signaux de retour multiplexés. De multiples constellations de quantification de signaux de retour et/ou sous-canaux de retour spécifiques des constellations peuvent être utilisés pour le sondage des canaux, de sorte qu'il est possible d'améliorer la totalité de la résolution et de la robustesse de retour, tout en conservant une capacité de signalisation réduite du canal de retour.

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