Combined angular, spatial, and temporal diversity for mobile radio system

摘要

A base station for use in a CDMA mobile radio communication system utilizes a combined angular, spatial, and temporal diversity antenna architecture to improve reverse link gain and coverage. The architecture is formed from a first and second diversity narrow beamwidth antenna element arranged to receive CDMA signals from a predetermined geographic coverage area. Each antenna element is oriented so that respective peak boresights form a 45 to 60° angle with respect to each other, and are slanted 22.5 to 30° with respect to a sector boresight. The first and second antenna elements are separated in distance by at least 10 wavelengths. A time delay can be connected to the outputs of the antenna elements to provide temporal diversity by delaying received signals by a predetermined period of time. A max ratio signal combiner continuously provides the best total input signal for a base station receiver.