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On mobility-supporting transmit beamforming in MISO FDD wireless systems

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2 Author(s)
Wookwon Lee ; Department of Electrical and Computer Engineering, Gannon University, Erie, PA 16541 USA ; Brian J. Sepko

When operating in frequency-division duplex (FDD) mode, transmit beamforming in multiple-input single-output (MISO) wireless communication systems typically requires accurate knowledge of downlink channel state information (CSI) at the transmitter. In practical FDD systems, obtaining such downlink CSI at the transmitter is challenging, if not impractical. To circumvent such challenge and support user mobility, we present a new method for transmit beamforming based on simple beam-control commands (BCCs) in MISO FDD mobile systems. We then numerically evaluate the effects of BCC errors in terms of transmit power efficiency, system capacity, and outage probability.

Published in:

Journal of Communications and Networks  (Volume:10 ,  Issue: 3 )