Title :
Multi-rate MC-DS-CDMA with multiuser detections for wireless multimedia communications
Author :
Fu, Po-Wei ; Chen, Kwang-Cheng
Author_Institution :
Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
6/24/1905 12:00:00 AM
Abstract :
In this paper, we study multi-rate transmission for MC-DS-CDMA systems based on the concepts of multi-code (MC) access and variable-spreading-length (VSL) code access. The general system model is derived for multi-rate MC-DS-CDMA systems of either multi-rate access and multiuser detection (MUD) are proposed thereof. We analyze the characteristics of multi-rate MC-DS-CDMA signals and investigate the behavior of the MUD. Compared studies and simulations among the proposed MUD and access methods suggest VSL-code access with the proposed LMMSE detection to multi-rate MC-DS-CDMA systems, especially for transceiving high-rate users.
Keywords :
code division multiple access; data communication; least mean squares methods; mobile radio; multimedia communication; multiuser channels; packet radio networks; signal detection; spread spectrum communication; transceivers; LMMSE detection; MC-DS-CDMA; high-rate users; multi-code access; multi-rate transmission; multiuser detection; system model; transceivers; variable-spreading-length code access; wireless multimedia communications; Educational institutions; Fading; Multiaccess communication; Multimedia communication; Multimedia systems; Multiuser detection; OFDM; Signal analysis; Wideband; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002874
