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Implementation and Experimental Verification of Hybrid Smart-Antenna Beamforming Algorithm

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5 Author(s)
Celik, N. ; Hawaii Center for Adv. Commun., Univ. of Hawaii, Honolulu, HI ; Kim, W. ; Demirkol, M.F. ; Iskander, M.F.
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In the literature (Zhang et al., and Rezk et al.), a hybrid beamforming algorithm utilizing a subset of array elements according to receive signal strength is proposed. The algorithm utilizes a smart switch which selects a subset of antennas that receive the signals with higher strength and a beamforming algorithm is performed to calculate the weights for the selected antennas. Since earlier results were based on simulations by Zhang et al., and Rezk et al., in this letter we present experimental results of testing a smart-antenna prototype with an eight-element array. This array is designed and implemented by the authors to verify the accuracy and performance of the proposed hybrid-beamforming algorithm. In general, the experimental results confirmed the simulation data. Specifically, it is shown that the proposed hybrid algorithm using a subset of the array has nearly the same performance as the adaptive system with the full array. Tradeoffs regarding beamwidth and the sidelobe levels are confirmed and additional experimental results illustrating the angle resolution of the developed system are presented

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Antennas and Wireless Propagation Letters, IEEE  (Volume:5 ,  Issue: 1 )