An Experimental Adaptive Beamforming System for the IEEE 802.16e-2005 OFDMA Downlink

Transmit adaptive beamforming can be applied on the subcarriers of an OFDM system to obtain a coherent processing gain at the receiver. The IEEE 802.16e-2005 standard for mobile broadband wireless access contains signaling strategies that facilitate the use of downlink adaptive beamforming which lev...

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Bibliographic Details
Main Authors: Porter, J.W., Kepler, J.F., Krauss, T.P., Vook, F.W., Blankenship, T.K., Desai, V., Schooler, A., Thomas, J.
Format: Conference Proceeding
Language:English
Subjects:
adaptive antennas
Adaptive arrays
Adaptive systems
Antenna arrays
Array signal processing
beamforming
broadband cellular
Downlink
IEEE 802.16
OFDM
Radio frequency
Receiving antennas
Testing
Transmitting antennas
WiMAX
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Summary:Transmit adaptive beamforming can be applied on the subcarriers of an OFDM system to obtain a coherent processing gain at the receiver. The IEEE 802.16e-2005 standard for mobile broadband wireless access contains signaling strategies that facilitate the use of downlink adaptive beamforming which leverages time-division duplex (TDD) channel reciprocity. Using these strategies, Motorola Labs has developed an experimental mobile multi-antenna OFDM system that implements a real-time, adaptive beamformer. This paper describes key components and parameters of this experimental system and describes the results of initial field experiments that show the performance gains realized by this platform
ISSN:2164-2958
2164-2974
DOI:10.1109/RWS.2007.351871