The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지
DOI QR코드

DOI QR Code

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

확장 13-Element EPSAR 안테나를 사용한 7×7 MIMO 시스템

  • Received : 2013.11.15
  • Accepted : 2014.01.20
  • Published : 2014.02.28
Download PDF
⟨ Previous Next ⟩

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 $3{\times}3$ 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 $7{\times}7$ 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.

MIMO 시스템은 통신 시스템의 채널 용량을 증가시키기 위해서 다양한 분야에서 사용된다. 그러나 이러한 통신 시스템은 다수의 RF 단을 필요로 하기 때문에 안테나 소형화에 문제가 있다. 게다가 다수의 RF 단으로 인하여 아날로그 회로에서의 전력 소모가 증가하고, RF 단의 간섭으로 인하여 통신 효율이 심각하게 저하된다. 이러한 이유 때문에 단일 RF 단을 가지면서도 MIMO 통신이 가능한 BS-MIMO 통신 방식이 제안되었다. BS-MIMO 시스템은 기본적으로 ESPAR 안테나를 사용한다. 기존의 ESPAR 안테나는 5-element 구조를 가지고 있으며, $3{\times}3$ MIMO 전송 까지만 가능하다. 그러므로 MIMO 차원을 확장시키기 위해서는 ESPAR 안테나의 구조 확장이 필수적이다. 본 논문에서는 단일 원 형태의 ESPAR 안테나의 구조 확장을 통해서 BS-MIMO 의 차원을 기존 MIMO 기술처럼 증가시킬 수 있음을 보였다. 설계의 예로써, 13-ESPAR 안테나를 사용하면 $7{\times}7$ BS-MIMO 전송이 가능함을 보였다. 또한 기생 배열안테나의 수가 2개씩 증가할수록 전송 가능한 MIMO 차원이 일씩 증가한다.

Keywords

References

  1. H. Lee, Q. Yang, and K. Kwak, "Performance evaluation for linear space-time coded MIMO-OFDM system considering diversityspatial multiplexing," J. KICS, vol. 29, no. 3A, pp. 240-247, Mar. 2004.
  2. H. Taewon, Y. Chenyang, W. Gang, and L. Shaoqian "OFDM and its wireless applications: A survey," IEEE Trans. Veh. Technol., vol. 58, no. 4, pp. 1673-1694, May 2009. https://doi.org/10.1109/TVT.2008.2004555
  3. P. R. King and S. Stavrou, "Land mobile-satellite MIMO capacity predictions," Electron. Lett., vol. 41, no. 13, pp. 749-751, Jun. 2005. https://doi.org/10.1049/el:20051446
  4. M. A. Jensen and J. W. Wallace. "Termination-dependent diversity performance of coupled antennas: Network theory analysis," IEEE Trans. Antennas and Propagation, vol. 52, no. 1. pp. 98-105, Jan. 2004. https://doi.org/10.1109/TAP.2003.822444
  5. A. F. Molisch, G. Kristensson, J. B. Andersen, and B. K. Lau. "Impact of matching network on bandwidth of compact antenna arrays," IEEE Trans. Antennas and Propagation, vol. 54, no. 11, pp. 3225-3238, Nov. 2006. https://doi.org/10.1109/TAP.2006.883984
  6. R.Y. Mesleh, H. Haas, S. Sinanovic, A. Chang Wook, and Y. Sangboh, "Spatial modulation," IEEE Trans. Veh. Technol., vol.57, no.4, pp. 2228-2241, Jul. 2008. https://doi.org/10.1109/TVT.2007.912136
  7. R. Rajashekar, K.V.S. Hari, and L. Hanzo, "Antenna selection in spatial modulation systems," IEEE Commun. Lett., vol. 17, no. 3, pp. 521-524, Mar. 2013. https://doi.org/10.1109/LCOMM.2013.012213.122650
  8. J. Yoon and S. Lee, "Compact meander-type antenna with a two layer structure for bluetooth operation," J. KICS, vol. 35, no. 4, pp. 89-93, Apr. 2010.
  9. A. Kalis, A. G. Kanatas, and C. Papadias, "A novel approach to MIMO transmission using a single rf front end" IEEE J. Selected Areas in Commun., vol. 26, no. 6, pp. 972-980, Aug. 2008. https://doi.org/10.1109/JSAC.2008.080813
  10. C. Y. An, S. H. Lee, and H. G. Ryu, "Beamspace MIMO system using ESPAR antenna with single RF chain," J. KICS, vol. 38, no. 10, pp. 885-892, Oct. 2013. https://doi.org/10.7840/kics.2013.38A.10.885
  11. O. N. Alrabadi, J. Perruisseau-Carrier, and A. Kalis, "MIMO transmission using a single RF source: Theory and antenna design," IEEE Trans. Antennas and Propagation, vol. 60, no. 2, pp. 654-664, Feb. 2012. https://doi.org/10.1109/TAP.2011.2173429
  12. V. Barousis, A. G. Kanatas, and A. Kalis, "Single RF MIMO systems: Exploiting the capabilities of parasitic antennas," IEEE Veh. Technol. Conf. (VTC Fall), pp. 1-5, Sept. 2011.