Title :
Optimum downlink antenna weight control method for adaptive array antennas in W-CDMA
Author :
Mikami, Manabu ; Fujii, Teruya
Author_Institution :
Information & Commun. Laboratories, Japan Telecom Co., Ltd., Tokyo, Japan
Abstract :
This paper studies a downlink antenna weight control method of adaptive array antenna at the base station in FDD/W-CDMA systems based on the location information of both the direction of arrival (DOA) and the distance between the base station and mobile unit. We introduce a power weight function added to transmitter power according to the distance from BS in order to improve CIR of users far from BS taking a multi-cell system environment into account. And we clarify that our proposed method is very effective to increase the user´s capacity in the downlink for a multi-cell system.
Keywords :
adaptive antenna arrays; broadband networks; code division multiple access; direction-of-arrival estimation; frequency division multiplexing; mobile radio; radio transmitters; telecommunication control; CIR improvement; FDD system; W-CDMA system; adaptive array antennas; direction of arrival; frequency division duplex; location information; multicell system; optimum downlink antenna; power weight function; transmitter power; weight control method; wideband code division multiple access; Adaptive arrays; Adaptive control; Antenna arrays; Base stations; Directive antennas; Downlink; Mobile antennas; Multiaccess communication; Programmable control; Weight control;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207184
