| 摘要 |
A smart antenna system includes: an antenna array including a plurality of antenna elements, and at least one calibration element; a plurality of transceiver units each having a port coupled with an associated one of the antenna elements, a receive port, and a transmit port; a transceiver calibration unit including a port coupled with the calibration element via a coaxial cable, a receive port, and a transmit port; and signal processing means communicatively coupled with each of the receive ports and the transmit ports of each of the transceiver units, and coupled with the calibration receive port and the calibration transmit port of the calibration unit. A transmitter calibration path associated with each antenna element extends from the transmit port of the associated transceiver unit to the associated antenna element, from the associated antenna element to the calibration element, and from the calibration element to the receive port of the calibration unit. A receiver calibration path associated with each antenna element extends from the transmit port of the calibration unit to the calibration element, from the calibration element to the associated antenna element, and from the associated antenna element to the receive port of the associated transceiver unit. The signal processing means is responsive to transmit mode resultant signals developed as a result of reference signals propagating through associated transmitter calibration paths. The signal processing means is also responsive to receive mode resultant signals developed as a result of reference signals propagating through associated receiver calibration paths.
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