Title :
Data detection and disjoint channel estimation over asynchronous CDMA flat Rayleigh fading channels
Author :
Pham, D. ; Pattipati, K. ; Willett ; Luo, J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Connecticut Univ., Storrs, CT, USA
Abstract :
Motivated by the work of Wu and Duel-Hallen (1996) for synchronous code-division multiple access (CDMA) systems, this paper develops a scheme for combined data detection and channel estimation over asynchronous CDMA flat Rayleigh fading channels. The scheme combines the effective probabilistic data association approach for multiuser detection (MUD) with simple, disjoint, decision-directed Kalman channel estimators. Computer simulations show that the strategy is effective in tracking the channel and offers low bit-error rates (BER) for differentially encoded data.
Keywords :
Kalman filters; Rayleigh channels; channel estimation; code division multiple access; error statistics; multiuser detection; tracking; BER; CDMA; MUD; Rayleigh fading channels; asynchronous flat fading channels; bit-error rates; channel tracking; data detection; decision-directed Kalman channel estimators; differentially encoded data; disjoint channel estimation; multiuser detection; probabilistic data association; synchronous code-division multiple access; Bit error rate; Channel estimation; Decorrelation; Fading; Kalman filters; Multiaccess communication; Multiuser detection; Personal digital assistants; Rayleigh channels; Symmetric matrices;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on
Print_ISBN :
0-7803-7858-X
DOI :
10.1109/SPAWC.2003.1318925
