Browsing by Author "Dubrovka, R."

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    Shaping coverage using antenna arrays for load-balancing in cellular networks
    (Видавництво Національного університету "Львівська політехніка", 2009) Wu, J.; Dubrovka, R.; Bigham, J.; Jiang, P.
    In this article the authors investigate shaping coverage cooperatively in a macro-cell environment and evaluate the benefits using real antenna models. Each antenna in this proposed scheme is an adaptive array equipped with the capability to re-configure and shape power patterns through power pattern synthesis. Patterns are formed cooperatively to control coverage and balance and maximize overall network capacity. A range of antenna models are tested in this paper using an ideal optimal synthesizer and verified using a system-level WCDMA simulator. The results are.
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    Wireless backhaul in cellular networks using phased array antenna with optically controlled phase shifter
    (Видавництво Національного університету "Львівська політехніка", 2009) Jiang, P.; Dubrovka, R.; Donnan, R.; Bigham, J.; Wu, J.
    Introducing relay stations into cellular networks has recently been seen as an effective way to develop high speed wide-area wireless networks since the use of wireless backhaul from relay station to the base station increases the flexibility and cost effectiveness of the deployment. A novel and fast approach to relay station deployment is proposed using phased array antennas and passive direction of arrival. A phased array antenna with electric beam steering ability is used to communicate between the base station and relay station. In this paper, antenna design issues for the phased array antenna to be used by the relay station are described that exploits a new optically controlled phase shifter.