Patent ID: 8179315
Filing Date: 2012-05-15
Classification: H01Q,H04B

Abstract:
1. A method for directing radiated energy from a transmitting device towards a receiving device in a multiple-antenna communications system, the method comprising: generating an input signal at the transmitting device, wherein the input signal has a number of symbols equal to a number of spatial streams intended for simultaneous transmission from the transmitting device towards the receiving device; determining a set of channel weights at the transmitting device, wherein the set of channel weights is indicative of a signal attenuation and a phase rotation induced by a transmission medium between the transmitting device and the receiving device; determining a set of steering weights at the transmitting device by iteratively applying a linear transform to an initial value of the steering weights to produce a final value of the steering weights, wherein the linear transform depends on the determined channel weights; applying the final value of the steering weights to the input signal at the transmitting device to produce a transmit signal; and transmitting the transmit signal from the transmitting device towards the receiving device using a number of antennas greater than or equal to the number of spatial streams.