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This thesis has investigated 4G radio access networks covering spectrum allocation methodologies, eNB software radios and architectures including interfacing performance aspects relevant for IMT-Advanced requirements. Dynamic spectrum allocation is an alternative to xed allocation methodologies. Al- though 100 MHz of spectrum per antenna will require frequencies re-allocation - initial rollouts with bandwidths of 40 MHz leveraging Carrier Aggregation and MIMO antenna techniques are foreseen within a 3-years time horizon. MultiRAN and high-power eNB congurations are expected to operate in the 1.7-2.6 GHz bands. Likewise, SingleRAN low-power congurations will operate in the 2.6-3.8 GHz bands allowing equipment manu- factures to focus on a limited number of systems and congurations. An SCR architecture is proposed based on SoC integration of both digital and analog functions allowing mod- ularity and exibility with a reduced footprint and equipment cost reduction. Baseband to radio interfaces were analyzed representing the future of open and dis- tributed eNB architectures. A contribution on carrier grade capacity analysis and interface interoperability enhancements was presented. Likewise, system synchronization and delay management - relevant because of the remote nature of OBSAI/CPRI equipment support- ing reliable multi-hop applications - were thoroughly analyzed. A new architecture for a serial receiver circuitry - the main source of interface delay measurement inaccuracy - is presented enabling 100 ps of theoretical resolution for delay variance.
Original languageEnglish
Publication dateMay 2011
Place of publicationKgs. Lyngby, Denmark
PublisherTechnical University of Denmark (DTU)
StatePublished
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