A Study of Short-Range MIMO Transmission Utilizing Polarization Multiplexing for the Simplification of Decoding

Ken HIRAGA  Kazumitsu SAKAMOTO  Kentaro NISHIMORI  Tomohiro SEKI  Tadao NAKAGAWA  Kazuhiro UEHARA  

IEICE TRANSACTIONS on Communications   Vol.E97-B    No.2    pp.459-468
Publication Date: 2014/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E97.B.459
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
short-range,  MIMO,  polarization multiplexing,  XPD,  antennas,  decoding,  

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One of the procedures for increasing the number of multi-input and multi-output (MIMO) branches without increasing the computational cost for MIMO detection or multiplexing is to exploit parallel transmissions by using polarization multiplexing. In this paper the effectiveness of using polarization multiplexing is confirmed under the existence of polarization rotation, which is inevitably present in short-range multi-input and multi-output (SR-MIMO) channels with planar array antennas. It is confirmed that 8×8 SR-MIMO transmission system with polarization multiplexing has 60bit/s/Hz of channel capacity. This paper also shows a model for theoretical cross polarization discrimination (XPD) degradation, which is useful to calculate XPD degradations on diagonal paths.