Multi-rate multi-carrier CDMA with multiuser detection for wireless multimedia communications
Resource
Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE
Journal
IEEE Wireless Communications and Networking Conference 2003 (WCNC 2003)
Pages
385-391
Date Issued
2003-03
Author(s)
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.
Type
conference paper
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