Patent ID: 6745009
Filing Date: 2004-06-01
Classification: H04B

Abstract:
In a communication system that utilizes closed-loop transmit diversity and has a first communication station and a second communication station, the first communication station for transmitting a communication signal to the second communication station, the communication signal weighted at a first weighting element associated with the fist transmit antenna of the communication station by a first antenna weight and the communication signal weighted at least at a second weighting element associated with the at least the second transmit antenna of the first communication station with at least a second antenna weight, an improvement of apparatus for facilitating optimization of selection of the first and at least second antenna weights, respectively by, which best to facilitate transmission of the communication signal said apparatus comprising:a perturbation vector selector coupled to the first communication station, said perturbation vector selector for selecting at least set of perturbation vector values to form at least a first selected perturbation vector; and a perturbation vector applicator coupled to said perturbation vector selector, said perturbation vector applicator for selecting application of applying the perturbation values forming the at least the first selected perturbation vector to the first and at least second weighting elements associated with the first and at least second transmit antennas, the perturbation values applied to the first and at last second weighting elements at least in part determinative of the first and at least second antenna weights and the communication signal weighted by the first and at least second antenna weights transmitted pursuant to the closed-loop transmit diversity.