Inexpensive upgrade of base-station dumb antennas by two magnetic loops for "blind" adaptive downlink beamforming

被引：18
|
作者：
Wong, KT [1 ]
Lai, AKY
机构：
[1] Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada
[2] Chinese Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
来源：
IEEE ANTENNAS AND PROPAGATION MAGAZINE | 2005年 / 47卷 / 01期
关键词：
adaptive signal detection; array signal processing; direction of arrival estimation; diversity methods; land mobile radio diversity systems; land mobile radio equipment; multiuser channels;
D O I：
10.1109/MAP.2005.1436274
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A simple scheme is herein proposed to upgrade an older base-station's "dumb" antennas for use in an adaptive space-division frequency-reuse downlink, with no expensive retrofitting of each "dumb" antenna with its own rake receiver. This scheme adds only two horizontally oriented loops (plus an optional vertically oriented dipole) to a base station's 120 degrees-azimuth sector, each with a temporal (not space-time) rake receiver. Such a pair (or triad) of diversely polarized but collocated antennas can estimate an incident mobile-source's uplink direction of arrival, based on which the existing "dumb" antennas can beam-form towards the mobile in downlink transmission.
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页码：189 / 193
页数：5
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