CDMAマルチサービスシステムの性能評価

Abstract

This paper proposed a CDMA-slotted ALOHA system, in which all transmitters used the same PN sequence but with different chip phases and packets can be captured because of the autocorrelation property of PN sequence. Then its channel throughput and some performance parameters with different number of receivers in base station are analyzed. The effects of wireless link quality on parameters such as packet dropping probability, average delay are discussed for some types of services. Analysis and simulation results show that the maximum channel throughput of this system is much greater than pure S-ALOHA system and multiservices can be supported with guaranteed QoS.