Multi-beam antenna system for cellular radio base stations

摘要

A base transceiver station operating a sectorized cell of a cellular radio system operates a plurality of narrow uplink main receive beams, and one or a plurality of uplink diversity receive beams. A scanning means (1300) scans each of the uplink main receive beams to locate a communications channel on the main uplink beams. A diversity receiver (1301) receives a diverse beam signal from the diverse beam(s), which is compared with a beam signal received from a main uplink beam, and the main beam signal from the main beam, or a diverse beam signal from the diversity antenna is selected, depending on the comparative signal to noise ratio and signal strength of the main beam signal and diversity beam signal. <IMAGE>