The Journal of Korean Institute of Electromagnetic Engineering and Science (한국전자파학회논문지)

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Reactance Set and Performance Evaluation of Chaos QPSK Beamspace MIMO System Using ESPAR Antenna

ESPAR 안테나를 사용하는 카오스 QPSK 빔 공간 MIMO 시스템을 위한 리액턴스 조합과 성능 평가

  • Lee, Jun-Hyun (Department of Electronics and Engineering, Chungbuk National University) ;
  • Lee, Dong-Hyung (Department of Electronics and Engineering, Chungbuk National University) ;
  • Keum, Hong-Sik (Department of Electronics and Engineering, Chungbuk National University) ;
  • Ryu, Heung-Gyoon (Department of Electronics and Engineering, Chungbuk National University)
  • Received : 2014.03.21
  • Accepted : 2014.06.03
  • Published : 2014.07.31
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Abstract

Recently, researches about MIMO(Multi-Input Multi-Output) system are being studied actively due to high-capacity and high-speed communication. However, MIMO system has many RF(Radio Frequency) chains according to many array antennas. So, MIMO system has disadvantages such as high-complexity and high-power-consumption. Also, it is impossible to miniaturize the antenna dimension. In order to solve these problems, beamspace MIMO system using ESPAR(Electronically Steerable Parasitic Array Radiator) antenna was proposed. It is possible to reduce the complexity and the power-consumption, because it has single RF chain by using one active antenna and several parasitic elements. In this paper, in order to improve the security, for the first time, chaos communication algorithm is applied to QPSK modulated beamspace MIMO system using ESPAR antenna. We define as chaos QPSK beamspace MIMO system, and evaluate the SER performance. Also, we confirm that QPSK symbols can be made by changing the reactance values of parasitic elements, and evaluate the SER performance of this system.

대용량, 초고속 통신으로 인해 MIMO 시스템에 대한 연구가 활발하게 진행 중이다. 하지만 MIMO 시스템은 다수의 배열 안테나를 사용하기 때문에 다수의 RF 체인이 존재한다. 이로 인해 복잡도와 전력 소모가 증가하고, 안테나의 소형화가 불가능하다는 단점을 가진다. 이런 단점을 극복하기 위해 ESPAR 안테나를 사용하는 Beamspace MIMO 기술이 제안되었다. ESPAR 안테나를 사용하는 빔 공간 MIMO 시스템은 단일 능동 소자와 다수의 기생 소자로 구성되어 있기 때문에, 단일 RF 체인으로 구성되어 있기 때문에 복잡도와 전력 소모를 감소시킬 수 있다. 본 논문에서는 ESPAR 안테나를 사용하는 QPSK 변조 방식의 빔 공간 MIMO 시스템에 보안성 향상을 위해 최초로 카오스 통신 알고리즘을 적용시킨다. 이 시스템을 카오스 빔 공간 MIMO 시스템이라고 정의하고, 통신 성능을 평가한다. 또한, ESPAR 안테나는 기생 소자의 리액턴스를 조절하여 리액턴스 셋을 생성함으로써 QPSK 심볼을 만들고, 이를 이용한 통신 성능을 평가한다.

Keywords

References

  1. A. Goldsmith, S. A. Jafar, N. Jindal, and S. Vishwanath, "Capacity limits of MIMO channels", IEEE J. Sel. Areas Commun., vol. 21, no. 5, pp. 684-702, Jun. 2003. https://doi.org/10.1109/JSAC.2003.810294
  2. M. L. Morris, M. A. Jensen, "Modeling front-end signal coupling in MIMO systems", in Proc. IEEE/ACES Int. Conf. on Wireless Communications and Applied Computational Electromagnetics, Honolulu, Hawaii, pp. 622-625, Apr. 2005.
  3. O. N. Alrabadi, C. B. Papadias, A. Kalis, N. Marchetti, and R. Prasad, "MIMO transmission and reception techniques using three-element ESPAR antennas", IEEE Commun. Lett., vol. 13, no. 4, pp. 236-238, Apr. 2009. https://doi.org/10.1109/LCOMM.2009.082190
  4. Osama N. Alrabadi, C. B. Papadias, and A. Kalis, "A universal encoding scheme for MIMO transmission using a single active element for PSK modulation schemes", IEEE Transactions on, Wireless Communications, vol. 8, no. 10, pp. 5133-5142, Oct. 2009. https://doi.org/10.1109/TWC.2009.080824
  5. J. A. Kalis, A. G. Kanatas, and C. B. Papadias, "A novel approach to MIMO transmission using a single RF front end", IEEE Journal on, Selected Areas in Communications, vol. 26, pp. 972-980, Aug. 2008. https://doi.org/10.1109/JSAC.2008.080813
  6. Q. Ding, J. N. Wang, "Design of frequency-modulated correlation delay shift keying chaotic communication system", Communications, IET, vol. 5, no. 7, pp. 901-905, May 2011. https://doi.org/10.1049/iet-com.2010.0643
  7. Sung Il Hong, Eun Young Jang, "FPGA implementation of digital transceiver using chaotic signal", Korea Institute of Information Technology Review, vol. 8, no. 8, pp. 9-15, Aug. 2010.
  8. O. Alrabadi, A. Kalis, C. Papadias, and A. G. Kanatas, "Spatial multiplexing by decomposing the far-field of a compact ESPAR antenna", in Proc. IEEE 19th Int. Symp. Personal, Indoor, Mobile Radio Commun. (PIMRC 2008), Cannes, France, pp. 1-5, Sep. 2008.
  9. T. Hassan, A. Kausar, H. Umair, and M. A. Anis, "Gain optimization of a seven element ESPAR antenna using Quasi-newton method", 2011 IEEE International Conference on, Microwave Technology & Computational Electromagnetics (ICMTCE), pp. 293-296, May 2011.