| 摘要 |
A cellular telephone base station (10) uses spatial signal processing to null co-channel (same frequency) interference, such as interference caused by other co-channel radio transmitters and multipath. Radio beams are formed by an antenna array (12) for either or both the transmit and the receive portions of the communications link. Amplitude and phase weighting is applied to inphase and quadrature (I&Q) channels of an array of antenna elements. For the receive portion of the link the weighted signals from these antenna channels are summed to produce a beamsummer output. For the transmit portion of the link the outgoing I&Q signal is amplitude and phase weighted, and then transmitted by the antenna elements in an array to form spatial beams. Antenna array weights are dynamically updated as the angled of arrival of the received signal changes. |
