Radio communication apparatus using adaptive antenna
First Claim
1. A radio communication apparatus comprising:
- a plurality of directional antennas;
a delay profile estimation section configured to estimate a delay profile representing arrival times of a desired wave and delay waves and received powers for each of received signals from said antennas;
an arrival angle range estimation section configured to estimate an arrival angle range of said desired wave from the delay profiles of the received signals estimated by said delay profile estimation section;
a transmission antenna selection section configured to select at least one of the antennas which is to be used for transmission, on the basis of the arrival angle range estimated by said arrival angle range estimation section; and
a transmission section configured to transmit transmission signals using said at least one antenna selected by said transmission antenna selection section.
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Accused Products
Abstract
In a radio communication apparatus, delay profiles of a desired wave and delay waves thereof are estimated by plural delay profile estimation sections for each of received signals from directional antennas constituting an array antenna. Received signals from the antennas selected by a reception antenna selector on the basis of the delay profile are subjected to a temporal/spatial equalization processing by an adaptive signal processing section and a path diversity combining section, thereby obtaining a reception output. An arrival angle range of the desired wave is estimated by a DOA estimation section from the delay profile estimated by the delay profile estimation section. Based on the arrival angle range, the antenna for transmission is selected by a transmission antenna selection section, and transmission signals are sent out.
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Citations
20 Claims
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1. A radio communication apparatus comprising:
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a plurality of directional antennas;
a delay profile estimation section configured to estimate a delay profile representing arrival times of a desired wave and delay waves and received powers for each of received signals from said antennas;
an arrival angle range estimation section configured to estimate an arrival angle range of said desired wave from the delay profiles of the received signals estimated by said delay profile estimation section;
a transmission antenna selection section configured to select at least one of the antennas which is to be used for transmission, on the basis of the arrival angle range estimated by said arrival angle range estimation section; and
a transmission section configured to transmit transmission signals using said at least one antenna selected by said transmission antenna selection section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio communication apparatus comprising:
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a plurality of omni-directional antennas;
a beam forming section configured to be connected to each of said antennas and to form a plurality of beams having different directions of radiation;
a plurality of delay profile estimation sections each configured to estimate a delay profile representing arrival times of a desired wave and delay waves and received powers for each of received signals by the beams formed by said beam forming section;
an arrival angle range estimation section configured to estimate an arrival angle range of said desired wave from the delay profile estimated by each of said delay profile estimation sections;
a transmission beam selection section configured to select at least one of the beams which is to be used for transmission, on the basis of the arrival angle range estimated by said arrival angle range estimation section; and
a transmission section configured to transmit transmission signals using said at least one beam selected by said transmission beam selection section. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification