Title :
Adaptive multi-rate multi-code CDMA systems
Author :
Schotten, Hans Dieter ; Elders-Boll, Harald ; Busboom, Axel
Author_Institution :
Inst. of Commun. Eng., Aachen Univ. of Technol., Germany
Abstract :
To support variable data-rates multi-code code-division multiple-access (MC-CDMA) systems have been proposed for mobile communications. They allow the support of variable source data-rates by variation of the set of spreading-sequences assigned to each user. The impact of the sequence-design on the system performance is considered. For the antifading capability and the multiuser interference performance measures are derived. We describe sequence-sets which are almost optimum with respect to these parameters and which allow each user to change its data-rate without affecting the other users
Keywords :
adaptive systems; code division multiple access; fading; land mobile radio; radiofrequency interference; sequences; spread spectrum communication; BER; DS-CDMA; MC-CDMA; adaptive multi-rate systems; antifading capability; code-division multiple-access; decoding; mobile communications; multi-code CDMA systems; multiuser interference performance measures; sequence-design; sequence-sets; spreading-sequences; system performance; variable data-rates; Channel capacity; Data engineering; Decoding; Fading; Interference; Mobile communication; Multiaccess communication; Multicarrier code division multiple access; System performance; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.683688
