Patent ID: 7482975
Filing Date: 2009-01-27
Classification: H04B

Abstract:
1. A multibeam transmitting/receiving apparatus for receiving uplink reception signals using a plurality of antennas and controlling the directivities of downlink transmission signals transmitted from the antennas based on the strength of the reception signals, wherein delay profiles for respective preset beams are generated, and if different delay profiles having the same path timing as the path timing of a delay profile with respect to which a maximum reception power level has been detected, then the directivities of the downlink transmission signals are determined based on reception antenna weights used for beams corresponding to two delay profiles from which the path timing has been detected and reception power levels obtained correspondingly to said path timings, said directivity being determined by the transmission antenna weight W(n), determined by the formula: wherein P 1 is the maximum reception power level, W 1 (n) is the transmission antenna weight of the first beam having said maximum power level, and W 2 (n) is the transmission antenna weight of the second beam having the same path timing as the first beam, where W 1 (n) and W 2 (n) may be selected from a table storing the associative relationship between beams and transmission antenna weights.