Title :
Adaptive H∞ delay tracking in asynchronous DS-CDMA systems
Author :
Manikas, A. ; Lim, S.S. ; Wilkinson, P.
Author_Institution :
Digital Commun. Res. Sect., Imperial Coll. of Sci., Technol. & Med., London, UK
Abstract :
In this paper a new H∞-type delay acquisition/tracking approach is proposed which is based on partitioning of the PN-code matrix of the CDMA users into submatrices which are then used to form a `state-space´ H∞-type linear combiner. The proposed novel formulation and approach is robust to modelling errors such as over- and underestimation of the number of signals present and provides a powerful near-far resistant delay-tracking solution in a multiuser DS-CDMA signal environment
Keywords :
adaptive estimation; code division multiple access; delays; matrix algebra; spread spectrum communication; state-space methods; tracking; H∞-type delay acquisition/tracking approach; PN-code matrix; adaptive H∞ delay tracking; asynchronous DS-CDMA systems; errors; multiuser DS-CDMA signal environment; near-far resistant delay-tracking solution; overestimation; partitioning; state-space H∞-type linear combiner; submatrices; underestimation; Covariance matrix; Degradation; Delay effects; Delay estimation; Immune system; Multiaccess communication; Propagation delay; Signal processing; Space vector pulse width modulation; State estimation;
Conference_Titel :
Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-4428-6
DOI :
10.1109/ICASSP.1998.679549
