Performance Analysis of Hybrid Beamforming Techniques in Large Multi User MIMO System

Birhanu, Yosef

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dc.contributor.author	Birhanu, Yosef
dc.date.accessioned	2020-06-11T06:57:18Z
dc.date.available	2020-06-11T06:57:18Z
dc.date.issued	2019-10
dc.identifier.uri	http://hdl.handle.net/123456789/10975
dc.description.abstract	Wirelesscommunicationssystem, evolvingfromsimplevoicecommunicationtoadvanced cellular communication have grown at a rapid pace in last two decades. But we are still seeking solution for keeping pace with the ever increasing demand for higher data rates in a more connected world today or more tomorrow. In order to accommodate such demands,5Gmobilenetworkwithmm-Wavelargemulti-inputmulti-output(MIMO)system is expected to oﬀer high data rate and reliable communication. The large number of antennas helps focus energy, which brings drastic improvements in data rate and eﬃciency. However, fully digital beamforming technique is not a viable solution due to the required number of RF chain per antenna element and processors require lots and lots of power. A viable solution to mitigate the challenge is to adopt hybrid beamforming techniques that perform precoding in the analog domain following digital processing. In this work we consider, hierarchical SVD based decomposition and two-stage iterative multiuserhybridbeamformingalgorithmtoalleviatethegenericoptimizationdiﬃcultiesofthe analog and digital beamforming matrices. We evaluate the performance of the down-link large multi-user(MU)-MIMO hybrid beamforming techniques in mm-Wave scenario taking spectral eﬃciency, energy eﬃciency, and computational and hardware complexity as a performance metrics. Plotted result showed that fully-connected hybrid beamforming techniques provides approximately 0.57 b/s/Hz higher spectral eﬃciency performance than the partially-connected hybrid beamforming techniques when the transmit power varies with 5dB diﬀerence. The required power consumption for fully-connected hybrid beamforming technique is number of RF chain at the BS times higher than the partiallyconnected hybrid beamforming techniques.	en_US
dc.language.iso	en	en_US
dc.subject	Communication Systems Engineering	en_US
dc.title	Performance Analysis of Hybrid Beamforming Techniques in Large Multi User MIMO System	en_US
dc.type	Thesis	en_US