On the Variable Capacity Property of CC/DS-CDMA Systems

—A complete complementary code based direct sequence code division multiple access (CC/DS-CDMA) system has been proposed recently as a potential candidate for beyond third generation (B3G) wireless communications. This paper addresses the issues that design of efficient code assignment schemes should be based on a flexible physical layer support, which is extremely important for emerging cross-layer designs in future wireless applications. The study in this paper considers a CC/DS-CDMA system with multiple time slots, three traffic classes and two dynamic code-flock assignment schemes, namely random assignment (RA) and compact assignment (CA). Simulation results show that the CC/DS-CDMA system has variable capacity property (VCP), which is sensitively affected by different code-flock assignment schemes. In general, CA can offer lower blocking probability, whereas RA can offer a larger mean system capacity and higher throughput when offered traffic is heavy.

• Type: Conference
• Year: 2005
• Where: QSHINE
• Authors: Li-Peng Wang, Yang Yang, Hsiao-Hwa Chen, Yonghua Song
• Keywords: Assignment Schemes, Code Assignment Schemes, Code-flock Assignment Schemes, QSHINE 2005, Wireless Networks