Institutional Repository of Lund University Found at http://www.lu.sehttp://dx.doi.org/10.1109/TAP.2011.2173142

MANUSCRIPT ACCEPTED FOR PUBLICATION IN IEEE TRANSACTIONS ONANTENNAS AND PROPAGATION (SEE COPYRIGHT NOTICE ON PAGE 1)

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Is orbital angularmomentum (OAM) based radio communication an unexploited area?
Ove Edfors, Member, IEEE, andAnders J Johansson, Member, IEEE
Abstract—We compare the technique of using the orbital angularmomentum (OAM) of radio waves for generating multiple channels in a radio communicationscenario with traditional multiple-in-multiple-out (MIMO) communication methods. Wedemonstrate that, for certain array configurations in free space, traditional MIMO theory leads toeigen-modes identical to the OAM states. From this we conclude that communicating over thesub-channels given by OAM states is a subset of the solutions offered by MIMO, and therefore [continua]

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