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

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
권호 표지
DOI QR코드

DOI QR Code

Sampling Time Offset and Compensation in TDM-Based Single RF Chain MIMO Receiver

TDM 수신 방식의 단일 RF 체인 MIMO 시스템에서 STO 특성 분석 및 보상

  • An, Changyoung (Department of Electronic Engineering, Chungbuk National University) ;
  • Ryu, Heung-Gyoon (Department of Electronic Engineering, Chungbuk National University)
  • Received : 2013.07.16
  • Accepted : 2013.09.11
  • Published : 2013.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

Conventional MIMO system is required to a number of RF chains as much as a number of antennas. If the number of antennas increased then the number of RF chains increased. Therefore, it is difficult to apply conventional MIMO system to mobile terminals with limited power. In this paper, we propose a TDM(time division multiplexing)-based single RF chain MIMO system. The outcome shows that performance of the proposed system is similar to conventional MIMO system using multiple RF chains when STO is corrected by phase angle estimation and the synchronizing signal of received signal. Therefore, it is possible to implement the MIMO-OFDM system of low power and complexity through a single RF chain.

기존의 MIMO 시스템은 수신 안테나 수만큼 신호처리를 위한 RF 체인이 필요하다. 안테나를 늘릴 경우, RF 체인도 같이 늘어나기 때문에 전력 소비량이 급격하게 증가하게 된다. 이러한 이유로 더 많은 안테나의 MIMO 시스템을 전력이 제한적인 모바일 단말기에 적용하기에는 어려움이 있다. 본 논문에서는 이러한 문제를 해결하기 위하여 단일 RF 체인을 이용하여 다중 안테나의 신호를 수신하는 시스템을 제안한다. 제안하는 시스템은 STO(Sampling Timing Offset)을 동기 신호와 신호의 위상 각 추정을 통해 보상하였을 때 다중 RF chain을 사용하는 일반적인 MIMO 시스템과 유사한 성능을 낸다. 따라서 단일 RF chain을 통하여 전력 소비를 감소시키면서 다중 안테나의 MIMO-OFDM 시스템을 구현할 수 있음을 확인하였다.

Keywords

References

  1. A. F. Naguib, N. Seshadri, and A. R. Calderbank, "Increasing data rate over wireless channel", IEEE Signal Process. Mag., vol. 17, no. 2, pp. 744-765, Mar. 1998.
  2. X. Li, H. C. Huang, A. Lozano, and G. J. Foschini, "Reduced-complexity detection algorithm for system using multi-element arrays", Proc. IEEE GLOBECOM, pp. 1072-1076, 2000.
  3. D. Shiu, J. M. Kahn, "Layered space-time codes for wireless communications using multiple transmit an tennas", in Proc. IEEE ICC, pp. 436-440, Jun. 1999.
  4. P. W. Wolniansky, G. J. Foschini, G. D. Golden, and R. A. Valenzuela, "V-BLAST: an architecture for realizing very high data rates over the richscattering wireless channel", in Proc. URSI ISSSE, pp. 295-300, Sep. 1998.
  5. G. J. Foschini, G. D. Golden, R. A. Valenzuela, and P. W. Wolniansky, "Simplified processing for high spectral efficiency wireless communications employing multi-element arrays", IEEE J. Sel. Areas Commun., vol. 17, pp. 1841-1852, Nov. 1999. https://doi.org/10.1109/49.806815
  6. Amitava Ghosh, et al., "LTE-advanced: Next-generation wireless broadband technology", IEEE Wireless Communications, pp. 10-22, Jun. 2010.
  7. Gang Wang, Dandan Wang, and Daoben Li, "An efficient ZF-SIC detection algorithm in MIMO CDMA system", Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on, vol. 2, pp. 1708-1711, Sep. 2003. https://doi.org/10.1109/PIMRC.2003.1260406
  8. M. Deruyck, W. Vereecken, E. Tanghe, W. Joseph, M. Pickavet, L. Martens, and P. Demeester, "Power consumption in wireless access network", Wireless Conference(EW), 2010 European, pp. 924-931, Apr. 2010.
  9. A. J. Paulraj, D. A. Gore, R. U. Nabar, and H. Bolcskei, "An overview of MIMO communications - a key to gigabit wireless", Proceedings of the IEEE, vol. 92, no. 2, pp. 198-218, Feb 2004. https://doi.org/10.1109/JPROC.2003.821915
  10. Elliot Briggs, Brian Nutter, and Dan McLane, "Sample clock offset detection and correction in the LTE downlink", Journal of Signal Processing Systems, vol. 69, no. 1, pp. 31-39, 2012. https://doi.org/10.1007/s11265-011-0643-5
  11. Sandeep Kaur, Charanjit Singh, and Amandeep Singh Sappal, "Effects and estimation techniques of symbol time offset and carrier frequency offset in OFDM system: Simulation and analysis", International Journal of Electronics and Computer Science Engineering, pp. 1188-1196, 2012.
  12. Hui-Kyu Lee, Heung-Gyoon Ryu, "Analysis and compensation of STO effects in the multi-band OFDM communication system of TDM reception method", The Journal of Korea Information and Communications Society, vol. 36, issue 5A, pp. 432-440, 2011. https://doi.org/10.7840/KICS.2011.36A.5.432