The Journal of the Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회논문지)

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
권호 표지
DOI QR코드

DOI QR Code

Performance of Interference Cancellation Scheme for Multihop Military Communication Systems

멀티 홉 군통신 시스템을 위한 간섭 제거 기법 성능 분석

  • Received : 2010.09.10
  • Accepted : 2011.06.10
  • Published : 2011.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we analyze co-channel interference cancellation performance to be generated in multi-hop military communication system. First, remove interference using zero-forcing (ZF) and minimum mean square error (MMSE) scheme as interference cancellation methods, and then obtain additional diversity gain and improve interference cancellation performance by applying successive interference cancellation (SIC). We consider Rayleigh fading channel and system performance is analyzed as respect of bit error probability. From simulation results, we confirm MMSE improves significantly BER performance than ZF in multi-hop wireless network environment. It is also confirmed ZF and MMSE schemes applying SIC algorithm have better performance comparing to the existing schemes. Therefore, MMSE-SIC method can provide more reliable signal transmission in the multi-hop military communication system.

본 논문에서는 멀티 홉 군통신 시스템에서 발생할 수 있는 동일채널 간섭 (CCI : Co-Channel Interference) 제거 성능을 분석하였다. 간섭 제거 기법으로 먼저 Zero Forcing (ZF)과 Minimum Mean Square Error (MMSE) 기법을 적용하여 간섭을 제거한 후, 연속 간섭 제거 (SIC : Successive Interference Cancellation) 알고리즘을 이용하여 추가적인 다이버시티 이득을 얻고 간섭 제거 성능을 향상시킨다. 무선 채널은 레일레이 (Rayleigh) 페이딩 채널을 고려하여 모의 실험을 하였으며, 시스템 성능은 비트 오류 확률 (Bit Error Probability) 측면에서 분석되었다. 모의실험 결과로부터, 멀티 홉 무선 네트워크 환경에서 MMSE가 ZF보다 BER 성능을 현저하게 향상시킴을 확인하였으며, 각각 기법에 연속 간섭 제거 알고리즘을 적용한 경우, 그 성능이 더욱 좋아지는 것을 알 수 있었다. 따라서 MMSE-SIC 방식은 멀티 홉 군통신 시스템에서 보다 신뢰성 있는 신호의 전송을 제공할 수 있다.

Keywords

References

  1. Jin Yonun Kim, MIMO-OFDM System for High-Speed Wireless Communications, Gyobo Publishers, Seoul, Korea, 2008.
  2. M. Jankiraman, Space-Time Codes and MIMO Systems, Artech House, Norwood: MA, 2004.
  3. S. M. Alamouti, "A simple transmitter diversity scheme for wireless communications", IEEE J. Select. Areas Commun., vol. 16, no. 8, pp. 1451-1458, Oct. 1998. https://doi.org/10.1109/49.730453
  4. A. Nosratinia, T. E. Hunter, and A. Hedayat, "Cooperative communication in wireless networks", IEEE Commun. Mag., vol. 42, no. 10, pp. 74-80, Oct. 2004. https://doi.org/10.1109/MCOM.2004.1341264
  5. H. Huh and J. Y. Kim, "Performance of a multicarrier DS/CDMA system with successive interference cancellation," European Transactions on Telecommunications, vol. 13, no. 3, pp. 237-243, May 2002. https://doi.org/10.1002/ett.4460130308
  6. D. Cox, "Cochannel interference considerations in frequency reuse small-coverage radio systems", IEEE Trans. Commun., vol. 36, no. 1, pp. 135-142, 1982.
  7. Bernard Sklar, Digital Communincations, 2nd edition, Prentice Hall, New Jersey, U.S., 2001
  8. Byeong-Gwon Kang, Ki-Kwan Han, "Performance analysis of the SFBC-OFDM system with MMSE and interference canceller", Journal of Korea Information and Communications Society 2008, Vol. 33, No. 8, pp. 291-297, Aug. 2008.
  9. H. Jianqiang, G. Guoxiang, and W. Zhongshan, ""MMSE interference suppression in MIMO frequency selective and time-varying fading channels,"" IEEE Trans. Signal Process., vol. 56, no. 8, pp. 3638-3651, Aug. 2008. https://doi.org/10.1109/TSP.2008.919389