A Low-Complexity Joint Synchronization and Detection Algorithm for Single-Band DS-CDMA UWB Communications

The problem of asynchronous direct-sequence code-division multiple-access (DS-CDMA) detection over the ultra-wideband (UWB) multipath channel is considered. A joint synchronization, channel-estimation, and multiuser detection scheme based on the adaptive linear minimum mean square error (LMMSE) receiver is presented and evaluated. Further, a novel nonrecursive least-squares algorithm capable of reducing the complexity of the adaptation in the receiver while preserving the advantages of the recursive least-squares (RLS) algorithm is presented.

[1]  Lars P.B. Christensen.  Signal processing for ultra-wideband systems , 2003 .

[2]  R M Morey,et al.  Response to FCC 98-208 notice of inquiry in the matter of revision of part 15 of the commission's rules regarding ultra-wideband transmission systems , 1998 .

[3]  Upamanyu Madhow.  Adaptive interference suppression for joint acquisition and demodulation of direct-sequence CDMA signals , 1995, Proceedings of MILCOM '95.

[4]  S. Haykin,et al.  Adaptive Filter Theory , 1986 .

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

[6]  Scott L. Miller,et al.  Acquisition performance of an adaptive receiver for DS-CDMA , 1999, IEEE Trans. Commun..

[7]  Asrar U. H. Sheikh,et al.  Performance analysis for an adaptive filter code-tracking technique in direct-sequence spread-spectrum systems , 1998, IEEE Trans. Commun..

[8]  H. Vincent Poor,et al.  Probability of error in MMSE multiuser detection , 1997, IEEE Trans. Inf. Theory.

[9]  S. Riad,et al.  UWB channel impulse response characterization using deconvolution techniques , 2002, The 2002 45th Midwest Symposium on Circuits and Systems, 2002. MWSCAS-2002..

[10]  Qinghua Li,et al.  Multiuser detection for DS-CDMA UWB in the home environment , 2002, IEEE J. Sel. Areas Commun..

[11]  Upamanyu Madhow,et al.  MMSE interference suppression for timing acquisition and demodulation in direct-sequence CDMA systems , 1998, IEEE Trans. Commun..

[12]  M. Latva-aho,et al.  CDMA downlink code acquisition performance in frequency-selective fading channels , 1998, Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361).

[13]  Moe Z. Win,et al.  The ultra-wide bandwidth indoor channel: from statistical model to simulations , 2002, IEEE J. Sel. Areas Commun..