Method and apparatus for pilot multiplexing in a wireless...

H - Electricity – 04 – L

Patent

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Details

H04L 27/26 (2006.01) H04B 1/76 (2006.01) H04L 1/06 (2006.01) H04L 5/02 (2006.01) H04L 25/02 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2636201

Techniques for multiplexing pilots in a wireless transmission are described. In one aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas, with each pilot sequence comprising pilot symbols sent in the time domain on a different set of subcarriers. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In another aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas based on frequency-domain code division multiplexing (FD-CDM) of a Chu sequence defined by a transmitter-specific value. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In yet another aspect, a transmitter station generates multiple pilot transmissions for multiple transmit antennas based on a first multiplexing scheme and generates multiple data transmissions based on a second multiplexing scheme that is different from the first multiplexing scheme.

L'invention concerne des techniques de multiplexage de pilotes dans une transmission sans fil. Dans un aspect, une station émettrice génère plusieurs séquence pilotes pour plusieurs antennes d'émission, chaque séquence pilote comprenant des symboles pilotes envoyés dans le domaine temporel sur un ensemble différent de sous-porteuses. La station émettrice génère ensuite plusieurs transmissions pilotes pour les antennes d'émission en fonction des séquences pilotes. Dans un autre aspect, une station émettrice génère plusieurs séquences pilotes pour plusieurs antennes d'émission en fonction du domaine de fréquence-multiplexage par répartition en code (FD-CDM) d'une séquence Chu définie par une valeur spécifique de l'émetteur. La station émettrice génère ensuite plusieurs transmissions pilotes pour les antennes d'émission en fonction des séquences pilotes. Dans un autre aspect encore, une station émettrice génère plusieurs transmission pilotes pour plusieurs antennes d'émission en fonction d'un premier programme de multiplexage et génère plusieurs transmissions de données en fonction d'un second programme de multiplexage différent du premier programme de multiplexage.

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