University of Twente Student Theses


Human body blockage impact on beamforming

Veld, R. (2021) Human body blockage impact on beamforming.

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Abstract:The impact of the human body blockage on the beamforming performance of a multi-user antenna system is studied. The considered beamforming algorithms are the matched filter (MF) and the zero forcing (ZF) precoding schemes. The body is modelled as an ideal perfect electric conductor (PEC) cylinder. The two users are assumed to be located in the far-field of an access point equipped with a uniform linear array antenna comprised of ideal isotropic radiators separated a half-wavelength apart. Two figures of merit are evaluated: (i) the directivity radiation pattern obtained with the precoding vectors, and (ii) the downlink signal-to-interference-plus noise ratio. As a result of numerical simulations it is observed that the signal attenuation in the direction of the main beam relative the free space (i.e., no blocking body present) depends on the frequency, the number of antennas and the separation distance of the blocking body (i.e., the PEC cylinder). It is observed that at the higher frequency the signal attenuation in the direction of the main beam is larger. Moreover, the higher frequency, the blockage effects become also larger for the larger ULA, as compared to the smaller one, since the elements sense a more uneven field strength.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Subject:53 electrotechnology
Programme:Electrical Engineering BSc (56953)
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