Journal of Communications and Networks

  • 제15권1호
  • /
  • Pages.8-14
  • /
  • 2013
  • /
  • 1229-2370(pISSN)
  • /
  • 1976-5541(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지
DOI QR코드

DOI QR Code

A Combination of CS-CDMA and OFDM for Enhanced LTE on Downlink Channel

  • Jiao, Bingli (School of Electronics Engineering and Computer Science, Peking University) ;
  • Ma, Meng (School of Electronics Engineering and Computer Science, Peking University) ;
  • Lee, William C.Y. (School of Electronics Engineering and Computer Science, Peking University)
  • 투고 : 2012.02.01
  • 심사 : 2012.05.04
  • 발행 : 2013.02.28
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

For alleviating the low spectrum efficiency problem of orthogonal frequency division multiplexing (OFDM), due to the strong inter-cell-interference (ICI) at cell's edge, we introduce comb-spectrum code division multiple access (CS-CDMA) into broadband OFDM system at downlink channel for enabling the use of entire spectrum for seamless coverage. In addition, we develop a new method, called orthogonal cell code (OCC) scheme, to assist CS-CDMA for nullifying the ICI from contiguous cells. In system operation, each of the conventional cells is divided into an outer cell and an inner cell, and a mobile station (MS) should access to the CS-CDMA when it is in the outer cell and access to OFDM when it is in the inner cell. This study investigates the spectrum efficiency of using CS-CDMA and makes a comparison with that of long term evolution (LTE) in the following cases; (1) under an assumption of perfect channel state information and (2) based on channel estimates at a MS station. The results show the great advantage of utilizing the proposed system.

키워드

참고문헌

  1. R.W. Chang, "Synthesis of band-limited orthogonal signals formultichannel data transmission," Bell Syst. Tech. J., vol. 46, pp. 1775-1796, Dec. 1966.
  2. A. Peled and A. Ruiz, "Frequency domain data transmission using reduced computational complexity algorithms," in Proc. IEEE ICASSP, Denver, USA, Apr. 1980, pp. 964-967.
  3. C. Y. Wong, R. S. Chen, K. B. Letaief, and R. D. Murch, "Multiuser OFDM with adaptive subcarrier, bit, and power allocation," IEEE J. Sel. Areas Commun., vol. 17, no. 10, pp. 1747-1758, 1999. https://doi.org/10.1109/49.793310
  4. G. L. St¨uber, J. R. Barry, S.W.Mclaughlin, Y. Li, M. A. Ingram, and T. G. Pratt, "Broadband MIMO-OFDM wireless communication," Proc. IEEE, vol. 92, no. 2, pp. 271-294, 2004. https://doi.org/10.1109/JPROC.2003.821912
  5. R. Moosavi, J. Eriksson, E. G. Larsson, N.Wiberg, P. Frenger, and F. Gunnarsson, "Comparion of strategies for signaling of scheduling assignments in wireless OFDM," IEEE Trans. Veh. Technol., vol. 59, pp. 4527-4542, Nov. 2010. https://doi.org/10.1109/TVT.2010.2066589
  6. R. Kwan, C. Leung, and J. Zhang, "Proportional fair multiuser scheduling in LTE," IEEE Signal Process. Lett., vol. 16, pp. 461-464, June 2009. https://doi.org/10.1109/LSP.2009.2016449
  7. A. J. Viterbi, "When not to spread spectrum - a sequel," IEEE Commun. Mag., vol. 23, no. 4, pp. 12-17, 1985.
  8. P. T. Brady, "A statistical analysis of on-off patterns in 16 conversations," Bell Syst. Tech. J., vol. 47, pp. 73-91, Jan. 1968. https://doi.org/10.1002/j.1538-7305.1968.tb00031.x
  9. W. C. Y. LEE and D. Lee, "CDMA capacity on pathloss and power control," in Proc. VTC-FALL, Boston, USA, 2000, pp. 624-629.
  10. A. J. Viterbi, A. M. Viterbi, K. S. Gilhousen, and E. Zehavi, "Soft hand off extends CDMA cell coverage and increase reverse link capacity," IEEE J. Sel. Areas Commun., vol. 12, no. 8, pp. 1281-1288, Oct. 1994. https://doi.org/10.1109/49.329346
  11. K. S. Gilhousen, I. M. Jacobs, R. Padovani, A. J. Viterbi, L. A. Weaver, Jr., and C. E.Wheatley, III, "On the capacity of a cellular CDMA system," IEEE Trans. Veh. Technol., vol. 40, no. 2, May 1991.
  12. X. Mao, Y. Cao, Y. Liu, and K. S. Trivedi, "Moduling and performance analysis for soft hand off schemes in CDMA cellular systems," IEEE Trans. Veh. Technol., vol. 55, no. 2, Mar. 2006.
  13. W. C. Y. Lee, "Overview of cellular CDMA," IEEE Trans. Veh. Technol., vol. 40, no. 2, pp. 291-302, 1991. https://doi.org/10.1109/25.289410
  14. M. Dai. (2009, Aug.). Analysis on loading of data srvice in CDMA 1x and EVDO cells. China Telecom Co. Ltd. [Online]. Available: http://tech.c114.net/164/a436798.html
  15. N. Yee, J.-P. Linnartz, and G. Fettweis, "Multi-carrier CDMA in indoor wireless radio networks," in Proc. IEEE PIMRC, Yokohama, Japan, Sept. 1993, pp. 109-113.
  16. K. L. Baum, T. A. Thomas, F. W. Vook, and V. Nangia, "Cyclic-prefix CDMA: An improved transmission method for broadband DS-CDMA cellular systems," in Proc. WCNC, Orlando, USA, Mar. 2002, pp. 183-188.
  17. H. Cheng, M. Ma, and B. Jiao, "On the design of comb spectrum code for multiple access scheme," IEEE Trans. Commun., vol. 57, no. 3, pp. 754-763, Mar. 2009. https://doi.org/10.1109/TCOMM.2009.03.050152
  18. S. Plass, "Hybrid partitioned cellular downlink structure for MC-CDMA and OFDMA," IET Electron. Lett., vol. 42, no. 4, pp. 226-228, Feb. 2006. https://doi.org/10.1049/el:20063516
  19. P. Z. Fan, N. Suehiro, N. Kuroyanagi, and X. M. Deng, "Class of binary sequences with zero correlation zone," IEEE Electron. Lett., vol. 35, pp. 777-779, Mar. 1999. https://doi.org/10.1049/el:19990567
  20. Spatial Channel Model for Multiple Input Multiple Output (MIMO) Simulations, Release 6, 3GPP standard TR 25.996 v6.1.0, Sept. 2003.
  21. D. Garg and F. Adachi, "Performance comparison of turbo-coded DSCDMA, MC-CDMA, and OFDMwith frequency-domain equalization and higher-level modulation," in Proc. IEEE VTC, Sept. 2004, pp. 2282-2286.
  22. M. Ma, Y. Yang, and B. Jiao, "A capacity comparison between MCCDMA and CP-CDMA," in Proc. VTC, Sept. 2006, pp. 1-4.
  23. Technical Specification Group Radio Access Network: Evolved Universal Terrestrial Radio Access (E-UTRA), Release 8, 3GPP standard TS(36-211) v8.4.0, 2008.