7×7 MIMO System Using Extended 13-Element ESPAR Antenna

Title & Authors
7×7 MIMO System Using Extended 13-Element ESPAR Antenna
Bok, Junyeong; Lee, Seung Hwan; Ryu, Heung-Gyoon;

Abstract
Multiple-input and multiple-output (MIMO) technique is used in many communication fields in order to increase the channel capacity. However, this MIMO system has difficulty of miniaturization of antenna size due to the multiple RF chains Also, multiple RF chain raises some problems which increase power consumption at RF circuit and degrade the system performance due to the interference between RF chains. Because of these reasons, beamspace MIMO (BS-MIMO) technique with only single RF chain was proposed for MIMO transmission. This BS-MIMO system basically uses electronically steerable parasitic array radiator (ESPAR) antenna. Existing ESPAR antenna has a 5-element structure. So, it is possible to do only $\small{3{\times}3}$ MIMO transmission. Therefore, in order to extend BS-MIMO dimension, extension of ESPAR antenna structure is essential. In this paper, we show that BS-MIMO dimension can be increased according to the extension of structure of the ESPAR antenna, as in the conventional MIMO techniques. For example, we show that it is possible to design the $\small{7{\times}7}$ BS-MIMO transmissions with the 13-element ESPAR antenna. Also, when the number of parasitic elements of ESPAR antenna increases by two elements, MIMO dimension is expanded by 1.
Keywords
BS-MIMO;ESPAR antenna;single RF chain;pattern modulation;MIMO;
Language
Korean
Cited by
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