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On the variable capacity property of CC/DS-CDMA systems

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4 Author(s)
Li-Peng Wang ; Sch. of Eng. & Design, Brunel Univ., London ; Yang Yang ; Hsiao-Hwa Chen ; Yong-Hua Song

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

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:55 ,  Issue: 3 )

Date of Publication:

May 2006

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