期刊名称：International Journal of Computer Science and Network Security
印刷版ISSN：1738-7906
出版年度：2010
卷号：10
期号：4
页码：94-103
出版社：International Journal of Computer Science and Network Security
摘要：One of the principle characteristics of CDMA and WCDMA systems is that its capacity is a function of total interference experienced by the network. The most common approaches investigated in this paper to enhance the system capacity are: Wideband CDMA, Power control accuracy, interference power, Frequency reuse, cell sectoring, power based call admission control, and etc. Since CDMA is interference limited system, the uplink signal-to-interference (SIR) is used in evaluating system capacity with each of the previous techniques under different environmental conditions, e.g., AWGN and Rayleigh fading using Perfect Power Control (PPC) and IPC. These techniques enhanced the WCDMA system capacity with high QoS. All other studies concerned with speech users but this study is concerned with data users. Data transmission use higher data rates than speech transmission so for the same bandwidth the total system capacity for data users will be less than it for speech users.
关键词：CDMA; WCDMA; Mobile communications; CDMA Uplink Capacity; Call Admission Control (CAC)
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