Quadrature phase shift keying direct sequence-spread spectrum code division multiple access with disparate quadrature chip and data rates

This research examines the performance of a QPSK DS-CDMA system with disparate chip and data rates (thus different processing gains) on the two quadrature channels for synchronous and asynchronous transmission using both orthogonal and random codes. In a CDMA setting, we investigate the effect on performance of unequal user signal energies and a variable number of interfering system users, in both AWGN and Rayleigh fading channels. With this disparate scheme we also obtain a moderate amount of shaping of the transmitted signal power spectrum. Our results show excellent agreement between analysis and simulations, and illustrate the additional degree of flexibility our disparate chip/data rate system provides

[1]  David W. Matolak,et al.  Spectrally shaped generalized multitone direct-sequence spread spectrum , 2004, IEEE MILCOM 2004. Military Communications Conference, 2004..

[2]  Subbarayan Pasupathy,et al.  Interference control and chip waveform design in multirate DS-CDMA communication systems , 2002, IEEE Trans. Wirel. Commun..

[3]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[4]  Laurence B. Milstein,et al.  Direct sequence spread spectrum Walsh-QPSK modulation , 1998, IEEE Trans. Commun..

[5]  Wenhui Xiong,et al.  Potential multicarrier and spread spectrum systems for future aviation data links , 2005, 2005 IEEE Aerospace Conference.

[6]  Huaping Liu,et al.  MULTIPLE ACCESS TECHNOLOGIES FOR B3G WIRELESS COMMUNICATIONS , 2005 .

[7]  Arne Svensson,et al.  Performance of different multi-rate schemes in DS/CDMA systems , 1994 .

[8]  Roger L. Peterson,et al.  Introduction to Spread Spectrum Communications , 1995 .

[9]  E-L. Kuan,et al.  Overview of Multicarrier CDMA , 2004 .

[10]  C. Cook,et al.  An introduction to spread spectrum , 1983, IEEE Communications Magazine.

[11]  Mohsen Guizani,et al.  Multiple access technologies for B3G wireless communications , 2005, IEEE Commun. Mag..

[12]  Sergio Verdú,et al.  Near-far resistance of multiuser detectors in asynchronous channels , 1990, IEEE Trans. Commun..

[13]  J.E. Mazo,et al.  Digital communications , 1985, Proceedings of the IEEE.

[14]  S. Parkvall.  Long vs short spreading codes in cellular DS-CDMA , 1998, 1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333).

[15]  H. Kusaka,et al.  Performance improvement of CDMA/QPSK systems with nonlinear channel using decision feedback equalizers , 1998, 1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333).

[16]  Stefan Parkvall,et al.  Variability of user performance in cellular DS-CDMA-long versus short spreading sequences , 2000, IEEE Trans. Commun..

[17]  Mark R. Bell,et al.  Asynchronous multicarrier DS-CDMA using mutually orthogonal complementary sets of sequences , 2000, IEEE Trans. Commun..

[18]  Qiang Wang,et al.  Reverse link interference modeling and outage analysis for DS/CDMA cellular systems , 1995, Wirel. Pers. Commun..

[19]  Victor C. M. Leung,et al.  Code-phase-shift keying: a power and bandwidth efficient spread spectrum signaling technique for wireless local area network applications , 1997, CCECE '97. Canadian Conference on Electrical and Computer Engineering. Engineering Innovation: Voyage of Discovery. Conference Proceedings.