Alternative Cell Configurations for Digital Mobile Radio Systems
C.-E.W. Sundberg · Bell System Technical Journal · 1983
This paper introduces a novel class of antenna configurations and applies it to cellular digital mobile radio systems with frequency reuse. Directional antennas are used extensively. Cooperation between more base stations than are in the conventional three-corner directional antenna scheme is required for the alternative cells. The paper studies the relationship between signal-to-cochannel interference and trunking efficiency (availability of channels) and compares conventional systems with the same base-station locations. We concluded that the new antenna configurations can significantly improve trunking efficiency. Time-division retransmission systems with space diversity are considered for some cases. Furthermore, we show how transmitter power weighting (i.e., certain transmitters have higher output power than others) can improve the signal-to-cochannel-interference ratio for the novel cellular systems.