Title :
Multi-rate multi-carrier CDMA with multiuser detection for wireless multimedia communications
Author :
Fu, Po-Wei ; Chen, Kwang-Cheng
Author_Institution :
Graduate Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
We study two multi-rate access methods of multicarrier CDMA systems, based on transforming the concepts of multi-code (MC) and variable-spreading-length (VSL) to frequency domain. A general and uniform system model accommodating both access methods is constructed, providing a framework of programmability for system integration. We thereof develop multiuser detections (MUD) applicable to both access methods. Chip-based filtering in frequency domain replaces the conventional match-filter band and yield novel detection behaviors. The signal properties and detection performance in multi-rate traffic are analyzed and demonstrated with numerical simulations, which manifests the multi-rate approaches and the superiority of MC access over VSL access in uplink MC-CDMA. The compared study shows the domination of spreading length over the interference pattern in MUD performance.
Keywords :
3G mobile communication; OFDM modulation; code division multiple access; filtering theory; frequency-domain analysis; multimedia communication; multiuser detection; telecommunication traffic; OFDM; chip-based filtering; frequency domain; multicarrier CDMA system; multicode; multirate access method; multirate traffic; multiuser detection; variable spreading length; wireless multimedia communication; Filtering; Frequency domain analysis; Matched filters; Multiaccess communication; Multimedia communication; Multiuser detection; Signal analysis; Signal detection; Traffic control; Wireless communication;
Conference_Titel :
Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-7700-1
DOI :
10.1109/WCNC.2003.1200380
