Patent ID: 7054663
Filing Date: 2006-05-30
Classification: H01Q,H04B

Abstract:
1. A method for forming polar diagram in a radio communications system using multiple access methods and with Ku subscribers, comprising: transmitting a subscriber signal from an individual subscriber to an antenna arrangement, which has Kb polar diagrams and Ka individual antennas, which produce Ka antenna signals from the subscriber signal, passing the Ka antenna signals as input signals to a common beam forming network with Ka inputs and Kb outputs, forming Kb weighted sum signals in the common beam forming network from the Ka antenna signals, the Kb weighted sum signals being formed for each of the Ku subscribers, the Kb weighted sum signals being sent respectively to the Kb outputs of the common beam forming network, assigning each of the Kb outputs of the beam forming network one, and only one, of the Kb polar diagrams of the antenna arrangement, for each of the Ku subscribers, passing the Kb weighted sum signals from the common beam forming network respectively to Kb inputs of an adaptive user-specific beam forming unit with Kb inputs, and selecting a user-specific polar diagram for each of the Ku subscribers, the user-specific polar diagrams being selected in the beam forming unit from the Kb weighted sum signals passed to the Kb inputs of the beam forming unit, wherein a selector is provided in the user-specific beam forming unit to select, on a user-specific basis, a subset of Kc signals from the Kb weighted sum signals, the user-specific polar diagram is selected based on the Kc signals, and to form the subset of Kc signals, the selector selects the Kb weighted sum signals whose user-specific weighted combination forms an optimum ratio between a respective subscriber useful signal and disturbing interference signals and noise.