Browse > Article
http://dx.doi.org/10.5762/KAIS.2010.11.7.2623

The Study on Hybrid Interference Cancellation Methods for Multirate MC DS/CDMA System  

Kim, Nam-Sun (Department of Communication Engineering, Daejin University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.11, no.7, 2010 , pp. 2623-2631 More about this Journal
Abstract
In this paper, we propose a new interference cancellation(IC) receiver for multirate Multicarrier DS/CDMA(MC DS/CDMA) system based on orthogonal variable spreading factor(OVSF) code. The users are assigned different lengths of OVSF codes as a spreading code according to their data rates and the active users having same representative code split into a group for effective cancellation. The code grouping interference cancellation(IC) receiver performs cancellation between the groups first and cancellation within group. This proposed IC receiver can cancel the interferences using desired user's code information and then desired signals are detected. The results show that the large improvement in performance can be attained by group-wise IC scheme and we can make the effective systems compare to conventional ones. The bit error rate of the system is analytically derived in frequency selective Rayleigh fading channel and we also compare the system performance with that of multirate DS/CDMA system. We also analyze the performance of the proposed system with same bandwidth and processing gain. The results show the large improvement in performance that can be attained by cancellation scheme.
Keywords
MC DS/CDMA; OVSF code; Interference cancellation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김두영, 이동통신 채널에서 간섭 제거 성능이 향상된 MC DS_CDMA 시스템에 관한 연구, 석사학위논문, 한양대학교, 2000.
2 T. Ottoson and A. Svensson, "On Schemes for Multirate Support in DS-CDMA Systems," Wireless Personal Commun., Kluwer Academic Publishers, Vol. 6, pp. 265-287, Mar. 1998.   DOI
3 Shinsuke Hara, "Overview of Multicarrier CDMA," IEEE Commun. Magazine, pp. 126-133, December, 1997.
4 P. Patel and J. Holtzman, "Analysis of a Simple Successive Interference Cancellation Scheme in a DS/CDMA System," IEEE J. on Selected Areas in Communications, Vol. 12, No. 5, pp. 796-807, June 1994.   DOI
5 Ashish Kaul and Brian D. Woerner, "An Analysis of Adaptive Multistage Interference Cancellation for CDMA," VTC 1995, Vol. 1, pp.82-86, July 1995.
6 S. Sun, L.K. Rasmussen, H. Sugimoto and T.J.Lim, "A Hybrid Interference Canceller in CDMA," IEEE ISSSTA, Vol.1, pp. 150-154, Sept. 1998.
7 Laurence B. Milstein, "Successive Interference Cancellation in Multicarrier DS/CDMA", IEEE Transactions on Communication, pp.1530-1540, Sep. 2000.
8 Hoon H. Young, K. C, et al. "Performance Enhancement of a Multicarrier DS/CDMA System through Interference Cancellation", IEEE Wireless Commun. and Networking Conference. WCNC, Vol 3, pp. 1576-1580, 1999
9 R. Malik, V.K. Dubey and B. McGUffin, "A hybrid interference canceller for CDMA systems in Rayleigh fading channels," VTC 2001, Vol. 2, pp.1523-1527, May 2001.
10 C.S. Wijting, T. Ojanpera, M. Juntti, K. Kansanen and R. Prasad, "Groupwise serial multiuser detectors for multirate DS-CDMA," VTC '99, Vol. 1, pp. 836-840, May 1999.
11 하원, "다중전송률 셀룰러시스템에서 코드그룹화에 의한 개선된 하향링크 신호간섭 억압 방법," 박사학위논문, 고려대학교, 2004년.
12 F. Adachi, et al., "Tree-structured generation of orthogonal spreading codes with different lengths for forward link of DS-CDMA mobile radio," Electron Lett., vol. 33, pp. 27-27, Jan.   DOI   ScienceOn
13 S.J. Lee, H.W. Lee and D.K. Sung, "Capacities of Single-code and Multi-code DS-CDMA Systems accommodating Multiclass Services," IEEE Trans. on Vech. Tech., vol. 48, no. 2, pp.376-384, Mar. 1999   DOI