SMART ANTENNA ARRAY OVER FIBER

摘要

A smart antenna system (100) includes a plurality of antennas (102), a plurality of Transmit - Receive Modules (TRMs) (112) coupled respectively to the plurality of antennas, and a beam steering module (116) coupled to the plurality of TRMs and providing radiation beam steering for the plurality of TRMs. The beam steering module (116) includes a pilot generator (316) for generating a pilot signal and providing it to the TRMs (112) to calibrate a receive (RX) reference plane. The pilot signal is injected at a first location before the receiver section into the RX path, and the pilot signal is sampled at a second location after the receiver section. The TRMs (112) and the beam steering module (116) can also be used to calibrate a transmit (TX) reference plane by sampling output signals from the TRMs. The output signals have a pilot signal component, and are sampled at the first location in the TX path after the transmitter section.