Transmitting apparatus, receiving apparatus, and link...

Details Transmitting apparatus, receiving apparatus, and link... Transmitting apparatus, receiving apparatus, and link...

H - Electricity

04

J

H04J 99/00 (2009.01) H04B 7/04 (2006.01) H04B 7/06 (2006.01)

Patent

CA 2606371

A link adaptation method and others wherein feedback information amount can be reduced. According to this method, a receiving apparatus (100) calculates, based on a channel matrix, a capacity (C) and a stream ratio (r) that is a ratio of the reception qualities of streams, and then transmits, as feedback information, the calculated capacity (C) and stream ratio (r) to a transmitting apparatus. In the transmitting apparatus (200), the number of transmittable streams, the modulation scheme and the fed-back capacity (C) are used to calculate the encoding ratio (R) and sequence length (S) of spatial multiplexed symbols. Then, the modulation scheme (M1-Mn) of each stream is decided based on the fed-back stream ratio (r) and the sequence length (S) of spatial multiplexed symbols.

L~invention a pour objet un procédé d~adaptation de liaisons et d~autres procédés permettant de réduire la quantité d~informations de rétroaction. Selon le procédé, un appareil récepteur (100) calcule, sur la base d~une matrice de canal, une capacité (C) et un ratio de flux de données (r) qui est le rapport des qualités de réception des flux de données, puis transmet, sous forme d~informations de rétroaction, la capacité (C) et le ratio de flux (r) calculés à un appareil transmetteur. Dans l~appareil transmetteur (200), le nombre de flux transmissibles, le schéma de modulation et la capacité de renvoi (C) sont utilisés pour calculer le ratio d~encodage (R) et la longueur de séquence (S) de symboles spatiaux multiplexés. Le schéma de modulation (M1-Mn) de chaque flux est ensuite déterminé sur la base du ratio de flux de renvoi (r) et de la longueur de séquence des symboles spatiaux multiplexés.

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