The KIPS Transactions:PartC (정보처리학회논문지C)

Korea Information Processing Society (한국정보처리학회)
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Performance Analysis of Adaptive Collaborative Communications in Wireless Networks

무선네트워크에서 적응형 협력통신의 성능 분석에 관한 연구

  • ;
  • 공형윤 (울산대학교 전기전자정보시스템공학부) ;
  • 정휘재 (울산대학교 전기 전자정보시스템공학과)
  • Published : 2006.10.30
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Abstract

Broadcast nature of wireless medium and path-loss reduction create a favourable condition for collaborative communications (CC) among single-antenna users to gain the powerful benefits of multi-antenna system without the demand for physical arrays. This paper proposes a CC strategy adapting to the propagation environment changes by optimizing the transmit signal amplification factors to simplify the structure of maximum likelihood (ML) detector and to obtain the minimum error probability as well. The closed-form BER expression was also derived and compared to the simulation results to evaluate the performance of the suggested solution. A variety of numerical results revealed the cooperation significantly outperforms non-cooperative counterpart under flat Rayleigh fading channel plus AWGN (Additive White Gaussian Noise).

단일 안테나를 사용하는 사용자들 사이의 협력통신은 무선 매체의 전송 특성이나 경로 손실을 이용하여 안테나의 숫자를 증가하지 않고도 다중 안테나 시스템의 강력한 장점을 얻을 수 있다. 본 논문에서는 ML(Maximum Likelihood) 검파기의 구조를 간단하게 할 뿐만 아니라 에러확률을 최소화 할 수 있는 전송신호 증폭인자의 최적화를 통해 전파환경의 변화에 순응하는 협력통신의 방법에 대해 제안한다. 제안하는 협력통신에 대해 수학적인 해석에 의한 BER(Bit Error Ratio) 표현을 유도할 뿐만 아니라 모의 실험 결과를 통해 그 성능을 비교한다. 다양한 수학적 계산의 결과를 통해 주파수 비선택적 Rayleigh 페이딩 채널에 AWGN(Additive White Gaussian Noise)이 합쳐진 채널 환경에서 실험한 결과 협력통신이 비 협력통신 보다 현저히 성능이 좋음을 알 수 있다.

Keywords

References

  1. John G. Proakis, 'Digital communications', Fourth Edition, McGraw-Hill, 2001
  2. V. Tarokh, H. Jafarkhani, A.R. Calderbank, 'Space-time block coding for wireless communications: performance results', IEEE Trans on Communications, Vol.17, pp. 451-460, March, 1999 https://doi.org/10.1109/49.753730
  3. Aria Nosratinia, Todd E. Hunter, 'Cooperative Communication in Wireless Networks', IEEE Communications Magazine, Vol.42, pp.74-80, Oct., 2004 https://doi.org/10.1109/MCOM.2004.1341264
  4. J. N. Laneman, 'Cooperative diversity in wireless networks: Algorithms and architectures,' Ph.D. dissertation, MIT, Cambridge, MA, Sep., 2002
  5. J.N. Laneman, G.W. Wornell, 'Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks', IEEE Trans. Inform. Theory, Vol.49, pp.2415-2525, Oct., 2003 https://doi.org/10.1109/TIT.2003.817829
  6. J.N. Laneman, D.N.C. Tse, G.W. Wornell, 'Cooperative diversity in wireless networks: Efficient protocols and outage behavior', IEEE Trans. Inform. Theory, Vol.50, Issue 12, pp.3062-3080, Dec., 2004 https://doi.org/10.1109/TIT.2004.838089
  7. P.A. Anghel, M. Kaveh, 'Exact symbol error probability of a Cooperative network in a Rayleigh-fading environment', IEEE Trans. on Commun., Vol.3, Issue 5, pp. 1416-1421, Sept., 2004 https://doi.org/10.1109/TWC.2004.833431
  8. A. Ribeiro, X. Cai, G.B. Giannakis, 'Symbol Error Probabilities for General Cooperative Links', IEEE Trans. Commun., Vol.4, Issue 3, pp.1264-1273, May, 2005 https://doi.org/10.1109/TWC.2005.846989
  9. E. Zimmermann, P. Herhold, G. Fettweis, 'The Impact of Cooperation on Diversity-Exploiting Protocols', 59th VTC 2004, Genoa, Italy, May, 2004
  10. M. S. Pavan Kumar, P. Herhold, R. Bhattacharjee, G. Fettweis, 'Cooperative Multi-hop Relaying Over Fading Channels Using a Cascaded 2-hop Technique', IEEE India Annual Conference (INDICON 2004), IIT Kharagpur, India, Dec., 2004 https://doi.org/10.1109/INDICO.2004.1497724
  11. E. Zimmermann, P. Herhold and G. Fettweis, 'On the Performance of Cooperative Relaying in Wireless Networks', European Trans. on Telecommunications, Vol. 16, no. 1, Jan-Feb., 2005
  12. P. Herhold, E. Zimmermann, G. Fettweis, 'A Simple Cooperative Extension to Wireless Relaying', 2004 Int. Zurich Seminar on Communications, Zurich, Switzerland, Feb., 2004 https://doi.org/10.1109/IZS.2004.1287382
  13. E. Zimmermann, P. Herhold, G. Fettweis, 'A Novel Protocol for Cooperative Diversity in Wireless Networks', European Wireless Conf. 2004, Barcelona, Spain, Feb., 2004
  14. P. Herhold, E. Zimmermann, G. Fettweis, 'On the Performance of Cooperative Amplify-and-Forward Relay Networks', 5th Int. ITG Conf. on Source and Channel Coding(SCC), Erlangen, Germany, Jan., 2004
  15. E. Zimmermann, P. Herhold, G. Fettweis, 'On the Performance of Cooperative Diversity Protocols in Practical Wireless Systems', 58th VTC, Orlando, FL, Oct., 2003 https://doi.org/10.1109/VETECF.2003.1285922
  16. M. S. Pavan Kumar, R. Bhattacharjee, P. Herhold, G. Fettweis, 'Cooperative Multi-hop Relaying Over Fading Channels', Int. Conf. on Signal Processing and Communications (SPCOM 2004), Bangalore, India, Dec., 2004 https://doi.org/10.1109/INDICO.2004.1497724
  17. H. Ochiai, P. Mitran, V. Tarokh, 'Design and analysis of collaborative diversity protocols for wireless sensor networks', VTC2004-Fall, Vol. 7, pp. 4645-4649, 26-29 Sept., 2004 https://doi.org/10.1109/VETECF.2004.1404971
  18. E.G. Larsson, Yang Cao, 'Summary: Not available..... Collaborative transmit diversity with adaptive radio resource and power allocation', Communications Letters, IEEE, Vol.9, Issue 6, pp.511 - 513, June, 2005 https://doi.org/10.1109/LCOMM.2005.1437354
  19. D.J. Love, R.W. Heath, 'Necessary and sufficient conditions for full diversity order in correlated Rayleigh fading beamforming and combining systems', IEEE Trans on Wireless Communications, Vol.4, Issue 1, pp.20-23, Jan., 2005 https://doi.org/10.1109/TWC.2004.840197
  20. A. Sendonaris, E. Erkip, B. Aazhang, 'User cooperation diversity. Part I-II', IEEE Trans on Communications, Vol. 51, pp.1927-1948, Nov. 2003 https://doi.org/10.1109/TCOMM.2003.818096
  21. R. Pabst, B. Walke, D. Schultz, P. Herhold, H. Yanikomeroglu, S. Mukherjee, H. Visvanathan, M. Lott, W. Zirwas, M. Dohler, H. Aghvami, D. Falconer, G. Fettweis, 'Relay-based Deployment Concepts for Wireless and Mobile Broadband Cellular Radio', IEEE Communications Magazine, Sept., 2004 https://doi.org/10.1109/MCOM.2004.1336724
  22. Athanasios Papoulis, S. Unnikrishna Pillai, 'Probability, Random Variables and Stochastic Process', Fourth Edition, McGraw Hill, 2002
  23. J. Boyer, D.D. Falconer, H. Yanikomeroglu, 'Multihop diversity in wireless relaying channels', IEEE Transactions on Communications, Vol. 52, Issue 10, pp.1820-1830, Oct., 2004 https://doi.org/10.1109/TCOMM.2004.836447