Title :
Adaptive channel delays selection for WCDMA mobile system
Author :
Bejjani, Elie ; Bouquier, J.-F. ; de Cacqueray, Benoît
Author_Institution :
Corp. Res. Centre, Alcatel, Nanterre, France
Abstract :
Reliable path selection is a crucial operation prior to RAKE combining in WCDMA. We propose a new adaptive method for path delays selection based on the computation of a dynamic threshold. By computing a power versus delay profile and excluding all the peaks that probably correspond to channel taps, the remaining noise-only samples are statistically modeled. The statistical parameters of the noise/interference are then used to set the tap selection threshold. As a consequence, we ensure that the threshold varies according to the interference level, and therefore the path selection procedure is made more reliable
Keywords :
adaptive systems; broadband networks; code division multiple access; delays; land mobile radio; multiuser channels; radio networks; radio receivers; radiofrequency interference; statistical analysis; RAKE combining; RAKE receiver; UMTS Terrestrial Radio Access; UTRA; WCDMA mobile system; adaptive channel delays selection; channel taps; delay profile; dynamic threshold; instantaneous power profile; interference level; noise-only samples; noise/interference; radio interfaces; reliable path selection; statistical model; statistical parameters; tap selection threshold; Channel estimation; Delay; Diversity reception; Interference; Multiaccess communication; Multipath channels; Neodymium; Power control; Power system reliability; Speech;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797111
