Open AccessTheoretical and experimental analysis of spatial division using antenna directivities in short‐range MIMO transmission
Author(s) -
Arai M.,
Seki T.,
Hiraga K.,
Nakagawa T.,
Uehara K.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.3555
Subject(s) - mimo , antenna (radio) , electronic engineering , transmission (telecommunications) , transmitter , division (mathematics) , 3g mimo , interference (communication) , antenna array , computer science , spatial multiplexing , telecommunications , channel (broadcasting) , engineering , mathematics , arithmetic
A simple method is proposed for achieving short‐range multiple‐input multiple‐output (MIMO) transmission without complicated signal processing. This is achieved by a spatial division that cancels interference between signal streams by using π ‐phase‐shifted antenna directivities in high speed parallel transmission systems at 60 GHz. The method achieves spatial division transmission without MIMO detection even for antenna elements with wide beamwidths. This makes it easy to design antenna elements and reduces signal processing costs in the transmitter and the receiver. Moreover, the method provides almost the same channel capacity as that of the complicated MIMO transmission methods. The optimal antenna array length is derived to maximise the capacity and the validity of the proposed method is confirmed through numerical and experimental analyses at 4.85 GHz.