Patent ID: 8374271
Filing Date: 2013-02-12
Classification: H04L

Abstract:
1. A method comprising: at a first wireless station, encoding a message to be transmitted between the first wireless station and a second wireless station into a first signal sequence using at least one of a space-time coding and spatial multiplexing technique; producing a second signal sequence and a third signal sequence from the first signal sequence; performing a first signal transformation on the second signal sequence and a second signal transformation on the third signal sequence; performing a first cyclic delay by a first predetermined cyclic delay factor on a first output data of the first signal transformation to increase frequency selectivity of the first output data; performing a second cyclic delay by a second predetermined cyclic delay factor on a second output data of the second signal transformation to increase frequency selectivity of the second output data, wherein the second predetermined cyclical delay factor is different from the first predetermined cyclic delay factor; allocating the first output data of the first signal transformation into a first plurality of transmission chains of a first transmission group at the first wireless station, wherein each of the first transmission chains of the first transmission group is configured to transmit the first output data of the first signal transformation via one of a first plurality of antennas of the first transmission group; and allocating the second output data of the second signal transformation into a second plurality of transmission chains of a second transmission group at the first wireless station, wherein each of the second transmission chains of the second transmission group is configured to transmit the second output data of the second signal transformation via one of a second plurality of antennas of the second transmission group.