Multiple-access interference and interfinger interference limit the capacity of conventional single-carrier DS-CDMA systems. Even though multicarrier CDMA posses the advantages of conventional CDMA and OFDM, it suffers from two major implementation difficulties such as peak-to-average power ratio and high sensitivity to frequency offset and RF phase noise. A novel approach based on single-carrier cyclic prefix-assisted CDMA has been proposed to overcome the disadvantages of single-carrier CDMA and multicarrier modulation. The usefulness of the proposed approach for high-speed packet access with simplified channel estimation procedures are investigated in this paper. The paper also proposes a data-dependent pilot structure for the downlink transmission of the proposed system for enhancing pilot-assisted channel estimation in frequency domain. The performance of the proposed pilot structure is compared against the data-independent common pilot structure. The proposed system is extensively simulated for different channel parameters with different channel estimation and equalization methods and the results are compared against conventional multicarrier CDMA systems with identical system specifications.
This article is part of the series Innovative Signal Transmission and Detection Techniques for Next Generation Cellular CDMA Systems.
Single Carrier Cyclic Prefix-Assisted CDMA System with Frequency Domain Equalization for High Data Rate Transmission
1 School of Computer Engineering, Nanyang Technological University, Nanyang Avenue 639798, Singapore
2 Institute for Infocomm Research, Agency for Science, Technology and Research (A*STAR), 21 Heng Mui Terrace, 119613, Singapore
3 Department of Electrical Engineering, Columbia University, New York, NY 10027, USA
EURASIP Journal on Wireless Communications and Networking 2004, 2004:862051 doi:10.1155/S1687147204405076
The electronic version of this article is the complete one and can be found online at: http://jwcn.eurasipjournals.com/content/2004/1/862051
Received: | 30 October 2003 |
Revisions received: | 8 March 2004 |
Published: | 29 July 2004 |
© 2004 Madhukumar et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.