Performance of DS-UWB multiple-access systems with diversity reception in dense multipath environments

Ultrawideband (UWB) technology is characterized by transmitting extremely short duration radio impulses. To improve its multiple-access capability, the UWB technology can be combined with traditional spread-spectrum techniques. This paper demonstrates the influence of spatial and temporal diversities on the performance of direct-sequence (DS) UWB multiple-access systems in dense multipath environments. Numerical results show that the bit error rate performance of the DS-UWB system can be improved significantly by increasing the number of antenna array elements and/or by adding more multipaths coherently at the receiver. Furthermore, this paper studies the impact of array geometry on system performance and shows that a rectangular array can capture more energy and thus can offer better performance than a uniform linear array

[1]  Moe Z. Win,et al.  On the energy capture of ultrawide bandwidth signals in dense multipath environments , 1998, IEEE Communications Letters.

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

[3]  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).

[4]  Moe Z. Win,et al.  Performance of low-complexity RAKE reception in a realistic UWB channel , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[5]  Andreas F. Molisch,et al.  Channel models for ultrawideband personal area networks , 2003, IEEE Wireless Communications.

[6]  A. Nallanathan,et al.  Multiple access performance of UWB M-ary impulse radio systems with diversity reception , 2004, 2004 International Workshop on Ultra Wideband Systems Joint with Conference on Ultra Wideband Systems and Technologies. Joint UWBST & IWUWBS 2004 (IEEE Cat. No.04EX812).

[7]  A.J. Paulraj,et al.  Space-time processing for wireless communications , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[8]  Moe Z. Win,et al.  Impulse radio multipath characteristics and diversity reception , 1998, ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220).

[9]  Desmond P. Taylor,et al.  A Statistical Model for Indoor Multipath Propagation , 2007 .

[10]  Bernard Mulgrew,et al.  Smart antenna arrays for CDMA systems , 1996, IEEE Wirel. Commun..

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

[12]  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).

[13]  J. Foerster,et al.  Channel modeling sub-committee report final , 2002 .

[14]  Arumugam Nallanathan,et al.  Performance of UWB multiple-access impulse radio systems with antenna array in dense multipath environments , 2006, IEEE Transactions on Communications.

[15]  Wayne E. Stark,et al.  Performance analysis of RAKE receivers for ultra-wideband communications with PPM and OOK in multipath channels , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[16]  Lars P. B. Christensen.  A Low-Complexity Joint Synchronization and Detection Algorithm for Single-Band DS-CDMA UWB Communications , 2005, EURASIP J. Adv. Signal Process..

[17]  Arumugam Nallanathan,et al.  Performance of UWB multiple access impulse radio systems in multipath environment with antenna array , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[18]  Malek G. M. Hussain,et al.  Principles of space-time array processing for ultrawide-band impulse radar and radio communications , 2002, IEEE Trans. Veh. Technol..

[19]  N. Boubaker,et al.  Performance analysis of DS-UWB multiple access under imperfect power control , 2004, IEEE Transactions on Communications.

[20]  Michael B. Pursley,et al.  Error Probabilities for Binary Direct-Sequence Spread-Spectrum Communications with Random Signature Sequences , 1987, IEEE Trans. Commun..