Patent ID: 7567583
Filing Date: 2009-07-28
Classification: H04B,H04L

Abstract:
1. A radio transmission apparatus comprising: a plurality of antennas; a weighting section operable to weight a plurality of data streams with a first set of weight vectors in a first transmission and to weight the plurality of data streams with a second set of weight vectors in a second transmission, the second set being different from the first set; and a transmission section operable to transmit the plurality of data streams weighted with the first set of weight vectors from the plurality of antennas in the first transmission and to transmit the plurality of data streams weighted with the second set of weight vectors from the plurality of antennas in the second transmission; wherein the weight vectors of the second set of weight vectors comprise the weight vectors of the first set of weight vectors, and wherein, in the second set of weight vectors, each of the weight vectors of the first set of weight vectors is switched in position relative to its position in the first set of weight vectors.