Cross-Layer Design Based Code Family Extension for CC/DS-CDMA Systems

A complete complementary codes based direct sequence code division multiple access (CC/DS-CDMA) system was recently proposed to offer isotropic interference free transmissions. Instead of being restricted by interference, the capacity of CC/DS-CDMA, however, is constrained by the number of code floc...

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Bibliographic Details
Main Authors: Li-Peng Wang, Yang Yang, Yong-Hua Song
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Chemical elements
Communications Society
Cross layer design
Design engineering
Direct-sequence code-division multiple access
Educational institutions
Interference constraints
Multiaccess communication
Multiple access interference
Online Access:Request full text
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Description
Summary:A complete complementary codes based direct sequence code division multiple access (CC/DS-CDMA) system was recently proposed to offer isotropic interference free transmissions. Instead of being restricted by interference, the capacity of CC/DS-CDMA, however, is constrained by the number of code flocks due to the small family size of current CC codes. In this article, an channel-dependent code family extension (COFE) scheme is proposed to increase the system capacity. The performance of the COFE scheme is investigated through extensive computer simulations. It is concluded that the COFE scheme not only tends to hold the interference-free property of CC/DS-CDMA, but also offers significant spectrum efficiency and system capability in terms of supporting applications with diverse QoS requirements.
ISSN:1550-3607
1938-1883
DOI:10.1109/ICC.2007.963