Ultra wideband DSSS for multiple access communications using antipodal signaling

Ultra wideband (UWB) technology is characterized by transmitting extremely short duration radio impulses. To improve its multiple access (MA) capability, UWB technology can be combined with traditional spread spectrum techniques. So far, much of the research has focused on employing time hopping spread spectrum with impulse radio using pulse position modulated (PPM) signals. In this paper, we outline the attractive features of direct sequence (DS) ultra wideband multiple access systems employing antipodal signaling and compare it with time hopping (TH). An appropriate DS-UWB transmitter and receiver are designed, and the system signal processing formulation is investigated. Performance of such communication systems in terms of multiple access capability, error rate performance, and achievable transmission rate are evaluated. An upper bound on the maximum number of users supported by the system is discussed.

[1]  Moe Z. Win,et al.  Spatio-temporal diversity in ultra-wideband radio , 1999, WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466).

[2]  Khaled Ben Letaief,et al.  Successive interference cancellation for multiuser asynchronous DS/CDMA detectors in multipath fading links , 1998, IEEE Trans. Commun..

[3]  Fernando Ramírez-Mireles,et al.  Performance of ultrawideband SSMA using time hopping and M-ary PPM , 2001, IEEE J. Sel. Areas Commun..

[4]  Moe Z. Win,et al.  Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications , 2000, IEEE Trans. Commun..

[5]  J.R. Foerster.  The performance of a direct-sequence spread ultrawideband system in the presence of multipath, narrowband interference, and multiuser interference , 2002, 2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580).

[6]  V. Srinivasa Somayazulu,et al.  Multiple access performance in UWB systems using time hopping vs. direct sequence spreading , 2002, 2002 IEEE Wireless Communications and Networking Conference Record. WCNC 2002 (Cat. No.02TH8609).

[7]  Moe Z. Win,et al.  Impulse radio: how it works , 1998, IEEE Communications Letters.

[8]  Moe Z. Win,et al.  ATM-based TH-SSMA network for multimedia PCS , 1999, IEEE J. Sel. Areas Commun..

[9]  Moe Z. Win,et al.  On the robustness of ultra-wide bandwidth signals in dense multipath environments , 1998, IEEE Communications Letters.

[10]  M. L. Welborn.  System considerations for ultra-wideband wireless networks , 2001, Proceedings RAWCON 2001. 2001 IEEE Radio and Wireless Conference (Cat.No.01EX514).

[11]  L. Fullerton.  UWB waveforms and coding for communications and radar , 1991, NTC '91 - National Telesystems Conference Proceedings.

[12]  Khaled Ben Letaief,et al.  An effective multiuser receiver for DS/CDMA systems , 2001, IEEE J. Sel. Areas Commun..

[13]  A. Swami,et al.  On the performance of UWB and DS-spread spectrum communication systems , 2002, 2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580).