Essential Considerations in Implementing the Smart Antenna System for Downlink Beamforming

Authors:
Weon-Cheol Lee;Seungwon Choi;Jae-Moung Kim
Affiliations:
Dept. of Information and Communications, Yong-in Songdam College, Yong-in, Korea;School of Electrical and Computer Engineering, Hanyang University, Seoul, Korea;The Graduate School of Information Technology and Telecommunication, Inha University, Incheon, Korea
Venue:
Wireless Personal Communications: An International Journal
Year:
2005

Citing 2
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Third-Generation Systems and Intelligent Wireless Networking: Smart Antennas and Adaptive Modulation

Third-Generation Systems and Intelligent Wireless Networking: Smart Antennas and Adaptive Modulation
Implementation of smart antenna base station with a novel searcher and tracker for CDMA 2000 1X

ICCS '02 Proceedings of the The 8th International Conference on Communication Systems - Volume 01

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Abstract

This paper addresses some essential problems that have to be taken into consideration in implementing the smart antenna base station (SABS) for downlink beamforming. In order to provide proper downlink beamforming as well as uplink beamforming, a pragmatic procedure of automatic calibration is proposed. Through the experimental test, we confirm that the proposed calibration technique has eliminated the problem of the phase differences of the signal path associated with each antenna. Also, in this paper, we first analyze the multipath condition under which the auxiliary pilot becomes indispensable for detecting the data transmitted on the data channel and what happens if the auxiliary pilot is not available. Then, the performance of the downlink beamforming utilizing the auxiliary pilot is analyzed through the computer simulations. Finally, we present a comparison of downlink communications to uplink ones in terms of throughputs available at each of uplink and downlink communications.