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In this contribution, a measurement campaign is
introduced for modeling radio channels with either Line-of-Sight
(LoS) or Non-Line-of-Sight (NLoS) connection between a user
equipment (UE) and a NodeB (NB) in an operating Universal
Mobile Telecommunications System. A Space-Alternating Generalized
Expectation-maximization (SAGE) algorithm is applied
to estimate the delays and the complex attenuations of multipath
components from the obtained channel impulse responses. Based
on a novel LoS detection method of multipath parameter
estimates, channels are classified into LoS and NLoS categories.
Deterministic models which are named “channel maps” and fading
statistical models have been constructed for LoS and NLoS,
respectively. In addition, statistics of new parameters, such as
the distance between the NB and the UE in LoS/NLoS scenarios,
the life-distance of LoS channel, the LoS existence probability
per location and per NB, the power variation at LoS to NLoS
transition and vice versa, as well as the transition duration,
are extracted. These models are applicable for designing and
performance evaluation of transmission techniques or systems
used by distinguishing the LoS and NLoS channels.
CitationChen, J. [et al.]. Measurement-based LoS/NLoS channel modeling for hot-spot urban scenarios in UMTS networks. A: MC and Scientific Meeting. "Proceedings of the 11th COST IC1004 MC and Scientific Meeting". krakow: 2014.
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