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Beamforming effects on measured mm-wave channel characteristics

dc.contributor.authorWyne, S.
dc.contributor.authorHaneda, K.
dc.contributor.authorRanvier, S.
dc.contributor.authorTufvesson, F.
dc.contributor.authorMolisch, A.F.
dc.date2011
dc.date.accessioned2016-03-29T12:43:54Z
dc.date.available2016-03-29T12:43:54Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/3152
dc.descriptionBeamforming is an important feature of 60 GHz communications. We present an analysis of the influence of beamforming in indoor ultrawideband radio channels measured in the mm-wave 60 GHz band. The performance of narrowband and wideband direction-based beamformers is investigated in terms of improving channel metrics such as the delay spread, excess delay, and the signal-to-noise ratio (SNR). The performance of the direction-based beamformers is compared with dominant eigenmode transmission and statistical beamforming. Our analysis reveals that in line-of-sight (LOS) scenarios, the two direction-based beamformers have a similar performance that approaches the upper bound set by dominant eigenmode transmission. In non-LOS (NLOS) scenarios, the direction-based beamformers show a performance degradation in relation to the upper bound, with the narrowband beamformer worse off than the wideband variant. The array gain in our measured NLOS scenarios is observed to exceed the theoretical upper limit valid for a rich scattering environment. We show that this result follows from the spatial structure of the measured NLOS channels that has only a few strong reflected components. We investigate the influence of array size on beamforming performance; 5×5 planar arrays are observed to improve the channel's delay metrics as well as the larger 7×7 planar arrays.
dc.languageeng
dc.titleBeamforming effects on measured mm-wave channel characteristics
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.free60 GHz band
dc.subject.freeArray gain
dc.subject.freeArray sizes
dc.subject.freeBeamformers
dc.subject.freeChannel characteristics
dc.subject.freeDelay spread
dc.subject.freeEigenmode transmission
dc.subject.freeExcess delay
dc.subject.freeLine-of-sight scenarios
dc.subject.freemm-Wave
dc.subject.freeNarrow bands
dc.subject.freePerformance degradation
dc.subject.freePlanar arrays
dc.subject.freeradio channel
dc.subject.freeScattering environment
dc.subject.freeSignal to noise
dc.subject.freeSpatial structure
dc.subject.freeUltra-wideband radio
dc.subject.freeUpper Bound
dc.subject.freeUpper limits
dc.subject.freeWide-band
dc.subject.freeArray processing
dc.subject.freeMeasurements
dc.subject.freeMillimeter waves
dc.subject.freeRadio broadcasting
dc.subject.freeRadio transmission
dc.subject.freeSignal to noise ratio
dc.subject.freeBeamforming
dc.source.titleIEEE Transactions on Wireless Communications
dc.source.volume10
dc.source.issue11
dc.source.page3553-3559
Orfeo.peerreviewedYes
dc.identifier.doi10.1109/TWC.2011.083111.100195
dc.identifier.scopus2-s2.0-83555164794


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