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http://dx.doi.org/10.7840/kics.2014.39A.2.77

Chaos QPSK Modulated Beamspace MIMO System Using ESPAR Antenna  

Lee, Jun-Hyun (충북대학교 전자공학과)
Bok, Jun-Yeong (충북대학교 전자공학과)
Ryu, Heung-Gyoon (충북대학교 전자공학과)
Abstract
Recently, utilization of MIMO(Multi-Input Multi-Output) system using array antennas is evaluated significantly according to the extension of high-capacity and high-speed communication services. However, MIMO system has disadvantages such as high-complexity and high-power-consumption, because RF(Radio Frequency) chain is required as antenna number, and several array antenna is used in conventional MIMO system. In order to solve these problems, research about beamspace MIMO system using ESPAR(Electronically Steerable Parasitic Array Radiator) antenna that has single RF chain by using one active antenna and several parasitic elements has been studied actively. Beamspace MIMO system using ESPAR antenna is possible to solve the problems of conventional MIMO system, because this system is composed by single RF chain. In this paper, in order to improve the system security, chaos communication algorithm that has characteristics such as non-periodic, non-predictability, easy implementation and initial condition is applied to QPSK (Quadrature Phase Shift Keying) modulated beamspace MIMO system. We design the chaos QPSK modulated beamspace MIMO system, and evaluate SER performance of this system.
Keywords
Chaos beamspace MIMO; MIMO communication system; ESPAR; QPSK; Single RF chain;
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