Title :
Downlink control channel transmission with antenna directivity switching or space diversity at base stations
Author :
Taromaru, Makoto ; Oishi, Mutsuhiko ; Akaiwa, Yoshihiko
Author_Institution :
Kyushu Matsushita Electr. Co. Ltd., Japan
Abstract :
Diversity reception is common for land mobile radio systems. In time division duplex (TDD) systems, transmission diversity as well as diversity reception can be applied for base stations because transfer characteristic correlation is high between uplink and downlink. Nevertheless, transmission diversity can not be applied for control channels, on which paging and other information is transferred, since there are no previous uplink signals. A new control channel transmission strategy to improve the error rate performance is proposed. In this strategy, a base station transmits control channel bursts repeatedly by switching diversity branch or antenna directivity. Computer simulations and experiments show that the strategy has 4-6 dB gain to the conventional one
Keywords :
antenna phased arrays; correlation methods; directive antennas; diversity reception; land mobile radio; radio links; radiowave propagation; telecommunication channels; telecommunication control; antenna directivity switching; base stations; computer simulations; control channel bursts transmission; control channel transmission; diversity reception; downlink control channel transmission; error rate performance; experiments; gain; land mobile radio systems; paging; phased array; propagation model; space diversity; time division duplex systems; transfer characteristic correlation; transmission diversity; uplink signals; Antenna arrays; Base stations; Computer simulation; Directive antennas; Diversity reception; Downlink; Error analysis; Phased arrays; Rayleigh channels; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-3871-5
DOI :
10.1109/PIMRC.1997.631102
