Space-time coded wideband CDMA systems

In this paper, we consider utilizing the space-time codes in the wideband CDMA system. We assume that there are multiple resolvable paths in the frequency selective fading channel. Analytical results show that in addition to spatial diversity, another diversity gain called multipath diversity is achievable. Performance criterion for full space multipath diversity gain is analyzed. We consider both the case that the receiver has the ideal channel state information and the case that there are errors in the channel state information available to the receiver. A RAKE receiver is used in the CDMA system to gain the multipath diversity. We derive the generalized RAKE receiver structure for the space-time block coding (STBC) coded wideband CDMA systems. The simulation results demonstrate the additional gain guaranteed by the multipath diversity.

[1]  Urbashi Mitra,et al.  Space-time block codes in multipath CDMA systems , 2001, Proceedings. 2001 IEEE International Symposium on Information Theory (IEEE Cat. No.01CH37252).

[2]  Ran Gozali,et al.  Space-Time Codes for High Data Rate Wireless Communications , 2002 .

[3]  A. Robert Calderbank,et al.  Space-time block coding for wireless communications: performance results , 1999, IEEE J. Sel. Areas Commun..

[4]  M. J. Gans,et al.  On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas , 1998, Wirel. Pers. Commun..

[5]  A. Robert Calderbank,et al.  Space-Time block codes from orthogonal designs , 1999, IEEE Trans. Inf. Theory.

[6]  A. Robert Calderbank,et al.  Space-time coding and signal processing for high data rate wireless communications , 2001, Wirel. Commun. Mob. Comput..

[7]  Khaled Ben Letaief,et al.  Performance evaluation and analysis of space-time coding in unequalized multipath fading links , 2000, IEEE Trans. Commun..

[8]  A. Robert Calderbank,et al.  Space-time codes for high data rate wireless communication: performance criteria in the presence of channel estimation errors, mobility, and multiple paths , 1999, IEEE Trans. Commun..

[9]  Georgios B. Giannakis,et al.  Space-time coding for broadband wireless communications , 2003, Wirel. Commun. Mob. Comput..

[10]  Urbashi Mitra,et al.  Optimal space-time block codes for CDMA systems , 2000, MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155).

[11]  G.L. Turin,et al.  Introduction to spread-spectrum antimultipath techniques and their application to urban digital radio , 1980, Proceedings of the IEEE.

[12]  A. Robert Calderbank,et al.  Space-time coding and signal processing for high data rate wireless communications , 2001, Wirel. Commun. Mob. Comput..