| 摘要 |
An active antenna array (10) for a mobile communications system is disclosed which comprises a plurality of receive paths (30-1, ..., 30-N) in which an individual one of the receive paths (30-1, ..., 30-N) is connected between an antenna element (20-1, ..., 20-N) and an analogue to digital converter (110-1, ..., 110-N) and wherein the analogue to digital converter (110-1, ..., 110-N) is adapted to digitise a receive signal to form a digitised receive signal. The active antenna array (10) further comprises a sounding signal generator (260) for generating a sounding signal in which the sounding signal is supplied to at least two of the plurality of receive paths (30-1, ..., 30-N) and a receive signal subtraction device for subtracting a wanted signal from the digitised receive signal. |
