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Performance of Repeaters in 3GPP LTE
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Repeater communication is one promising candidate solution in future cellular networks because of its ability to increase throughput, data rate and coverage. It is also considered as one candidate technology feature in 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) Advanced. Traditionally repeaters have been active continuously and perform blind forwarding without knowing the signal. However the repeater in LTE Advanced is likely to include some advanced functionalities such as frequency selectivity, gain controllability, multi antenna ability, advanced antenna processing, optimum power control algorithm, etc. In this thesis, on-frequency repeaters with frequency selectivity and gain controllability are analyzed and it is shown that the performance of repeater is highly dependent on the environment. It is necessary that the composite path gain (two-hop link) must be better than direct path gain (direct link) and the interference is attenuated in order to use the repeaters. The repeater directional donor antenna can be employed to further improve these two-hop links. And finally the benefit of advanced repeater functionalities is larger for uplink than downlink especially in heavy interference scenario however power limitation is often a bottleneck in uplink.

Place, publisher, year, edition, pages
2009. , 84 p.
Trita-ICT-EX, 67
National Category
Communication Systems
URN: urn:nbn:se:kth:diva-48940OAI: diva2:458890
Subject / course
Communications Systems
Educational program
Master of Science - Wireless Systems
Available from: 2011-12-01 Created: 2011-11-24 Last updated: 2011-12-01Bibliographically approved

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