Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Claes Beckman"'
Publikováno v:
2022 IEEE International Workshop Technical Committee on Communications Quality and Reliability (CQR).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7baee916fb4167c65473dc250220d279
https://doi.org/10.1109/cqr54764.2022.9918616
https://doi.org/10.1109/cqr54764.2022.9918616
Publikováno v:
VTC Spring
Providing cellular voice onboard trains has proven to be a challenging task. The metallic chassis and the energysaving coating on the windows act as a radio shield. In combination with sparsely spaced cellular base stations on rural routes, the cover
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ac53de47f12e7e98444bb315210dded
https://doi.org/10.1109/vtc2020-spring48590.2020.9128782
https://doi.org/10.1109/vtc2020-spring48590.2020.9128782
Publikováno v:
PIMRC
Providing reliable internet connectivity to train passengers can be handled with onboard aggregation routers that use multiple external antennas to simultaneously convey user traffic over multiple links. This work studies the operational characterist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb95593f60c23f1c58e5b6aaca606915
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-75833
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-75833
Publikováno v:
VTC-Fall
Train-mounted aggregation routers that provide WiFi access to train passengers and bundle external communication over multiple cellular modems/links is an efficient way of providing communication services on trains. However, the characteristics of su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aee16cf9682b4467945be5968ffce66b
https://doi.org/10.1109/vtcfall.2017.8288294
https://doi.org/10.1109/vtcfall.2017.8288294
Publikováno v:
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
We provide measured data collected from 97 trains completing over 7000 journeys in Sweden showing that the throughput over LTE is impacted by train velocity. In order to explain these observations we assume that the underlying causes can be found in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb162ee4fb681aa8e1e641792e5dd922
https://doi.org/10.1109/apusncursinrsm.2017.8072975
https://doi.org/10.1109/apusncursinrsm.2017.8072975
Publikováno v:
2016 IEEE International Symposium on Antennas and Propagation (APSURSI).
In this study, system level simulations are performed using two different vertical antenna radiation patterns from two real base station antennas with otherwise similar characteristics. The vertical half power beam widths of the two antennas in the i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4049bea4a295c8fc1414c803bded4083
https://doi.org/10.1109/aps.2016.7696162
https://doi.org/10.1109/aps.2016.7696162
Autor:
Kristoffer Nilsson, Claes Beckman
Publikováno v:
VTC Spring
A number of protection criteria were implemented by the Swedish regulator PTS in order to protect the GSM-R operations in Sweden. In order to protect the GSM-R receivers from interference and blocking, two different constraints were implemented: Firs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::562e07b117b1007898ecef3105da4868
https://doi.org/10.1109/vtcspring.2016.7504505
https://doi.org/10.1109/vtcspring.2016.7504505
Publikováno v:
Acta Ophthalmologica. 71:471-476
The efficacy of cataract surgery in improving visual performance was evaluated in 10 patients by measuring changes in intraocular light scatter, contrast sensitivity and glare induced visual loss. Two different methods were used to estimate these fun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe3eaa56df2699cca49f99e7e5502d96
https://doi.org/10.1111/j.1755-3768.1993.tb04620.x
https://doi.org/10.1111/j.1755-3768.1993.tb04620.x
Publikováno v:
Acta Ophthalmologica. 72:27-32
The benefits of Nd:YAG laser capsulotomy on visual performance were evaluated in 13 patients with after-cataract following extracapsular cataract extraction. Besides clinical evaluation we measured: visual acuity, letter contrast sensitivity with and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c39ea55b6689061b128a861b3ed1e25
https://doi.org/10.1111/j.1755-3768.1994.tb02732.x
https://doi.org/10.1111/j.1755-3768.1994.tb02732.x
Autor:
G. Smith, Claes Beckman
Publikováno v:
IEEE Wireless Communications. 12:78-85
In the wake of the substantial financial commitments incurred by European and other UMTS network operators in the form of licence fees, licensees have turned to network sharing as a means of reducing the capital requirements needed to bring 3G servic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56997324e6d467338a24ea4d2840e18a
https://doi.org/10.1109/mwc.2005.1421931
https://doi.org/10.1109/mwc.2005.1421931