Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Jørgen Bach Andersen"'
Autor:
Jørgen Bach Andersen
Publikováno v:
IEEE Communications Magazine. 55:6-10
Radio waves from a few kilohertz to millimeter-wave frequencies play a key role in modern wireless communications. The development over the last 120 years is traced with an emphasis on communication aspects and physical phenomena rather than theory.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b65623e9d69697bb7ab4541eec43ffcd
https://doi.org/10.1109/mcom.2017.7841460
https://doi.org/10.1109/mcom.2017.7841460
Publikováno v:
Manchón, C N, Carvalho, E D & Andersen, J B 2017, Ping-Pong Beam Training with Hybrid Digital-Analog Antenna Arrays . in 2017 IEEE International Conference on Communications (ICC) . IEEE, IEEE International Conference on Communications, IEEE ICC 2017 Wireless Communications Symposium, Paris, France, 21/05/2017 . https://doi.org/10.1109/ICC.2017.7996580
ICC
ICC
In this article we propose an iterative training scheme that approximates optimal beamforming between two transceivers equipped with hybrid digital-analog antenna arrays. Inspired by methods proposed for digital arrays that exploit algebraic power it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de7181e58e766c37e57f4dbdf4220544
https://vbn.aau.dk/da/publications/c938cfa6-db96-4739-9836-e671dcd6eddc
https://vbn.aau.dk/da/publications/c938cfa6-db96-4739-9836-e671dcd6eddc
Publikováno v:
Ai, Y, Andersen, J B & Cheffena, M 2017, ' Path-Loss Prediction for an Industrial Indoor Environment Based on Room Electromagnetics ', IEEE Transactions on Antennas and Propagation, vol. 65, no. 7, pp. 3664-3674 . https://doi.org/10.1109/TAP.2017.2702708
IEEE Transactions on Antennas and Propagation
IEEE Transactions on Antennas and Propagation
A simple approach of path-loss and root mean square delay spread prediction for indoor propagation environment is developed based on the room electromagnetics theory. The indoor room environment is interpreted as a lossy cavity, which is characterize
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8bfcf0198d52a1cad71e6117e2b3a24
http://hdl.handle.net/11250/2465975
http://hdl.handle.net/11250/2465975
Publikováno v:
Carvalho, E D & Andersen, J B 2016, ' Transceivers Based on Ping-Pong Beam Training for Large Multiuser MIMO Systems ', I E E E Wireless Communications Letters, vol. 5, no. 6, pp. 656-659 . https://doi.org/10.1109/LWC.2016.2613041
Ping-pong beam training (PPBT) is a procedure for estimating the singular vectors of a channel matrix. It relies on alternate transmissions between two devices and is applicable to reciprocal channels. In a large multi-user MIMO system with massive a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44bd3b3d96797c9d459fe41775860270
https://vbn.aau.dk/da/publications/40f5871c-bd0e-468a-b785-bec1c606ba38
https://vbn.aau.dk/da/publications/40f5871c-bd0e-468a-b785-bec1c606ba38
Publikováno v:
Andersen, J B, Nielsen, J Ø & Pedersen, G F 2016, ' Absorption Related to Hand-Held Devices in Data Mode ', I E E E Transactions on Electromagnetic Compatibility, vol. 58, no. 1, pp. 47-53 . https://doi.org/10.1109/TEMC.2015.2504398
The human body has an influence on the radiationfrom handheld devices like smartphones, tablets and laptops,part of the energy is absorbed and the spatial distribution of theradiated part is modified. Previous studies of whole body absorp-tion have m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cb30015536d7f75fda540492956c238
https://vbn.aau.dk/da/publications/ef7503f3-1cab-42b6-8f8b-75f204b51cf5
https://vbn.aau.dk/da/publications/ef7503f3-1cab-42b6-8f8b-75f204b51cf5
Publikováno v:
Gustafsson, M, Andersen, J B, Kristensson, G & Pedersen, G F 2012, ' Forward Scattering of Loaded and Unloaded Antennas ', I E E E Transactions on Antennas and Propagation, pp. 5663-5668 . https://doi.org/10.1109/TAP.2012.2214191
Forward scattering of antennas is related to antenna performance via the forward-scattering sum rule. The forward-scattering sum rule is an integral identity that shows that a weighted integral of the extinction cross section over all spectrum is pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98f52c2affee79491f842c51086d8565
https://doi.org/10.1109/tap.2012.2214191
https://doi.org/10.1109/tap.2012.2214191
Autor:
Jørgen Bach Andersen, Buon Kiong Lau
Publikováno v:
Lau, B K & Andersen, J B 2012, ' Simple and Efficient Decoupling of Compact Arrays With Parasitic Scatterers ', I E E E Transactions on Antennas and Propagation, vol. 60, no. 2, pp. 464-472 . https://doi.org/10.1109/TAP.2011.2173440
IEEE Transactions on Antennas and Propagation; 60(2), pp 464-472 (2012)
IEEE Transactions on Antennas and Propagation; 60(2), pp 464-472 (2012)
Compact arrays such as multiple antennas on a mobile terminal suffer from low efficiency and high correlation between antenna signals. In the present paper, a simple and rigorous procedure for decoupling two closely coupled antennas with a parasitic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0931401b9fec829c62bed01dad74b26
https://doi.org/10.1109/tap.2011.2173440
https://doi.org/10.1109/tap.2011.2173440
Publikováno v:
IEEE Transactions on Antennas and Propagation
Andersen, J B, Chee, K L, Jacob, M, Pedersen, G F & Kurner, T 2012, ' Reverberation and Absorption in an Aircraft Cabin with the Impact of Passengers ', I E E E Transactions on Antennas and Propagation, vol. 60, no. 5, pp. 2472-2480 . https://doi.org/10.1109/TAP.2012.2189700
Andersen, J B, Chee, K L, Jacob, M, Pedersen, G F & Kurner, T 2012, ' Reverberation and Absorption in an Aircraft Cabin with the Impact of Passengers ', I E E E Transactions on Antennas and Propagation, vol. 60, no. 5, pp. 2472-2480 . https://doi.org/10.1109/TAP.2012.2189700
Using a similar approach to that applied in acoustics and in microwave reverberation chambers, a theory of wideband propagation in a closed environment is discussed. Here, a room environment is viewed as a lossy cavity, characterized by diffuse scatt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ad8adc4e8fa291e40e1e131b86be551
Publikováno v:
Franek, O, Andersen, J B & Pedersen, G F 2011, ' Diffuse Scattering Model of Indoor Wideband Propagation ', I E E E Transactions on Antennas and Propagation, vol. 59, no. 8, pp. 3006-3012 . https://doi.org/10.1109/TAP.2011.2158791
This paper presents a discrete-time numerical algorithm for computing field distributions in indoor environments by diffuse scattering from the walls. Calculations are performed for a rectangular room with semireflective walls. The walls are divided
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61c711fc131e56e840f30f0e51173321
https://doi.org/10.1109/tap.2011.2158791
https://doi.org/10.1109/tap.2011.2158791
Autor:
Gert Frølund Pedersen, Ondrej Franek, Jørgen Bach Andersen, Mikael Bergholz Knudsen, Mauro Pelosi
Publikováno v:
Pelosi, M, Franek, O, Knudsen, M B, Pedersen, G F & Andersen, J B 2010, ' Antenna Proximity Effects for Talk and Data Modes in Mobile Phones ', I E E E Antennas and Propagation Magazine, vol. 52, no. 3, pp. 15-27 . https://doi.org/10.1109/MAP.2010.5586570
Based on a recent study of the ways a phone is held (a grip study), CAD models of the human hand have been generated, and antenna proximity effects for both talk and data modes in mobile phones have been investigated using an FDTD code. The simulatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bdd4b5ae85ff8218e1096e7b8066763
https://doi.org/10.1109/map.2010.5586570
https://doi.org/10.1109/map.2010.5586570