Patent ID: 7274951
Filing Date: 2007-09-25
Classification: H01Q,H04B

Abstract:
1. A multi-beam antenna transmitter/receiver receiving a plurality of reception beams and transmitting a plurality of transmission beams, and selecting a transmission beam on the basis of overall reception qualities calculated from reception qualities of path delays of user signals present in the plurality of reception beams, the multi-beam antenna transmitter/receiver comprising: a reception array antenna in which reception antenna elements are arranged; radio reception means for receiving outputs from the reception antenna elements, performing a reception process for an input signal, and outputting the signal; reception beam formation means for receiving an output from said radio reception means and forming a reception beam; reception beam path detection means for detecting a path delay for each user signal from an output of the reception beam formation means; reception beam calculation means for calculating an overall reception quality for a path delay/reception beam number of a user signal present in the reception beam to output a user transmission beam number, and outputting user reception data using the path delay/reception beam number; path delay/reception beam selection means for selecting the path delay/reception beam number used for demodulation on the basis of a reception quality of a user signal corresponding to the path delay/reception beam number as an output from said reception beam path detection means; demodulation means for performing demodulation using the path delay/reception beam number notified by said path delay/reception beam selection means; user modulation means for receiving user transmission data, performing a modulation process, and outputting a modulated user signal; user transmission beam switching means for receiving the user transmission beam number and the modulated user signal, and outputting the modulated user signal so as to form a transmission beam corresponding to the user transmission beam number; transmission beam selection means for selecting a transmission beam on the basis of overall reception quality calculated of the user signal for each reception beam that is notified by the reception beam calculation means, and notifying the user transmission beam switching means; transmission beam formation means for receiving an output from said user transmission beam switching means, and forming the transmission beam; radio transmission means for receiving an output from said transmission beam formation means, performing a transmission process for an input signal, and outputting the signal; and a transmission array antenna in which transmission antenna elements for transmitting an output from said radio transmission means are arranged.