NDLI: Performances of beamforming in downlink with smart antenna testbed

Content Provider	IEEE Xplore Digital Library
Author	Amano, Y. Inoue, T. Shinonaga, H.
Copyright Year	2002
Description	Author affiliation: KDDI R&D Labs. Inc., Saitama, Japan (Amano, Y.; Inoue, T.; Shinonaga, H.)
Abstract	This paper describes field trials with a smart antenna testbed system for IMT-2000 to evaluate the beamforming performance in the downlink. In the testbed system, a method to fit the transmit beam pattern to the virtual beam pattern, which is formed virtually for the downlink beamforming with correlation matrices measured in the uplink, was employed as the criterion of the downlink beamforming. Also, in consideration of the difference of antenna element radiation characteristics in uplink and downlink frequencies, the transmit and receive beam pattern calibration (TR-BPCal) algorithm was employed. The results of field trials confirmed the downlink beam/null-steering to the desired/undesired user, the transmit power reduction in the base transceiver station due to the null-steering to the interference signal and an improvement of the reduction when using the TR-BPCal algorithm.
Starting Page	77
Ending Page	81
File Size	748384
Page Count	5
File Format	PDF
ISBN	0780374673
ISSN	10903038
DOI	10.1109/VETECF.2002.1040306
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-09-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Performance evaluation Array signal processing Downlink System testing Antenna measurements Receiving antennas Transmitting antennas Frequency Calibration Transceivers
Content Type	Text
Resource Type	Article

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