Title :
Grouped RAKE finger management principle for wideband CDMA
Author :
Vejlgaard, Benny N. ; Mogensen, Preben ; Knudsen, Jasper Bailum
Author_Institution :
Bosch Telecom Danmark, Pandrup, Denmark
Abstract :
A RAKE finger allocation algorithm for direct-sequence spread-spectrum systems is presented and analyzed. The RAKE finger allocation method is based on grouped RAKE finger assignment. The detected code phases with greatest power are assigned a group of RAKE fingers with equal spacing around the detected code phase. Allocating the RAKE fingers with spacing less than one chip period can reduce overhead for delay tracking. The grouped RAKE finger allocation principle is compared to single RAKE finger allocation. Allocating three RAKE fingers with Tc/2 spacing gives a 0.2-0.4 dB gain compared to single RAKE finger assignment with the same number of RAKE and tracking fingers
Keywords :
broadband networks; code division multiple access; delays; land mobile radio; multipath channels; multiuser channels; radio networks; radio receivers; spread spectrum communication; synchronisation; telecommunication network management; DS-SS systems; RAKE finger allocation algorithm; delay tracking; detected code phases; direct-sequence spread-spectrum systems; gain; grouped RAKE finger management; mobile station; multipath delay; overhead reduction; single RAKE finger allocation; wideband CDMA; Delay; Fading; Fingers; Multiaccess communication; Multipath channels; Performance analysis; Phase detection; RAKE receivers; Testing; Wideband;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851423
