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Performance Improvement Techniques for an OFDM-CDMA System without Guard Interval  

Lee Hyun-Woo (LG전자 이동통신기술연구소)
Park Joong-Hoo (한양대학교 전자컴퓨터공학부 이동통신시스템 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.5A, 2006 , pp. 501-508 More about this Journal
Abstract
Orthogonal frequency division multiplexing-code division multiplexing access(OFDM-CDMA) systems without guard interval can enhance the bandwidth performance more efficiently than the systems with guard interval. In this paper, a new technique for an OFDM-CDMA system without guard interval, which can eliminate inter-symbol interference(ISI) and inter-channel interference(ICI), is presented. The proposed algorithm is a new demodulation technique, based on the Pseudo-Decorrelator, and it is named PD algorithm. Simulation results show that the PD algorithm can combat ISI and ICI efficiently for an OFDM-CDMA system without guard interval. The BER performance of the PD algorithm is much better than that of a conventional OFDM-CDMA system without guard interval.
Keywords
PD algorithm; OFDM-CDMA system; guard interval; Pseudo-Decorrelator;
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1 S. Hara and R. Prasad, 'Overview of Multicarrier CDMA,' IEEE Commun. Mag., Vol. 35, pp.126-133, December 1997
2 X. Wu, Q. Yin, J. Zhang, and K. Deng, 'Time-Domain Multiuser Detection for MC-CDMA Systems without Cyclic Prefix,' Proceeding of IEEE International Conference on Commun., Vol.2, pp.921-925, May 2002
3 A. Ben-Israel and T. N. E. Greville, Generalized Inverses: Theory and Applications, Wiley, 1977
4 S. L. Campbell and C. D. Jr. Meyer, Generalized Inverses of Linear Transformations, Dover, 1991
5 R. Schur, J. Speidel, and R. Angerbauer, 'Reduction of Guard Interval by Impulse Compression for DMT Modulation on Twisted Pair Cables,' Proceedings of IEEE Global Telecommun. Conference, vol. 3, pp.1632-1636, December 2000
6 Joong-Hoo Park and William H. Tranter, 'Pseudo-Decorrelating Multiuser Receivers for Asynchronous Code Division Multiple Access(CDMA) Systems,' IEICE Trans. Commun., vol.E81-B, no.11, pp.2197-2204, November 1998
7 S. Trautmann and N. J. Fliege, 'A New Equalizer for Multitone Systems without Guard Time,' IEEE Commun. Letters, vol. 6, pp.34-36, January 2002   DOI   ScienceOn
8 L. Hanzo, M. Munster, B. J. Choi, and T. Keller, OFDM and MC-CDMA, Wiley, 2003
9 R. Van Nee and R. Prasad, OFDM for Wireless Multimedia Communications, Artech House, 2000
10 D. Kim and G. L. Stuber, 'Residual ISI Cancellation for OFDM with Applications to HDTV Broadcasting,' IEEE Journal on Selected Areas in Commun., vol.16, pp.1590-1599, October 1998   DOI   ScienceOn
11 S. Trautmann, T. Karp, and N. J. Fliege, 'Frequency Domain Equalization of DMT/OFDM Systems with Insufficient Guard Interval,' Proceedings of IEEE International Conference on Commun., vo1.3, pp.1646-1650, May 2002
12 S. Kaiser, 'On the Performance of Different Detection Techniques for OFDM-CDMA in Fading Channels,' IEEE GLOBECOM '95, Vol.3, pp.2059-2063, November 1995
13 B. Xu, C. Yang, and S. Mao, 'A Multi-Carrier Detection Algorithm for OFDM Systems without Guard Time,' Proceedings of IEEE International Conference on Commun., vol. 5, pp.3377-3381, 2003
14 K. W. Cheong and J. M. Cioffi, 'Precoder for DMT with Insufficient Cyclic Prefix', Proceedings of IEEE International Conference on Commun., vol.1, pp.339-343, June 1998
15 Y. Li and Y. L. Guan, 'Modified Jakes' Model for Simulation Multiple Uncorrelated Fading Waveforms,' Proceeding of IEEE International Conference on Commun., vol.1, pp.46-49, 2000
16 R. Prasad, OFDM for Wireless Communications Systems, Artech House, 2004