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cdma systems capacity engineering
[...]... is the synchronized CDMA systems, such as IS-95-like and cdma2 000-like systems The other group is the unsynchronized CDMA systems, such as WCDMA-like systems In this book, we are mainly concerned with evaluating the capacity of the synchronized CDMA systems in various aspects of capacity definition All contents in 10 Introduction the book, however, can be applicable to WCDMA-like systems that have an... simultaneous users that CDMA systems can support while maintaining desired QoS The capacity of voiceonly CDMA systems can be found [18] In [19], V K Paulrajan et al investigated the capacity of CDMA systems for multiclass services in single cell case and visualized the resulting capacity Further, J Yang et al expanded the approach of [19] to the case of multicells [20] The capacity of CDMA systems with respect... IS-95B systems can support medium user data rates of up to 115.2 Kbps by code aggregation without changing the physical layer of IS-95A The next evolution of CDMA systems has led to wideband CDMA Wideband CDMA has a bandwidth of 5 MHz or more Several wideband CDMA proposals have been made for 3G wireless systems The two wideband CDMA schemes for 3G are WCDMA, which is network asynchronous, and cdma2 000,... an interesting topic to evaluate the capacity of CDMA systems supporting mixed services, focusing on the characteristics of various kinds of traffic In this book, we tackle this issue especially for IS-95-like and cdma2 000-like CDMA systems where the BSs are all synchronized All contents in the book, however, can be applied to WCDMA-like systems that Figure 1.2 systems Evolution path of 2G/3G cellular... systems, the number of frequency slots or the number of time slots corresponds to the system capacity, respectively, as TDMA and FDMA systems tend to run out of frequency channels or time slots before they become capacity or coverage limited On the other hand, in the case of CDMA systems, transmit power constraints and the system’s self-generated interference ultimately restrict CDMA capacity, as CDMA. .. Wireless Systems, ” IEEE Proc of MWCN, 2002, pp 261–265 CHAPTER 2 System Capacity of CDMA Systems The maximum number of simultaneous users satisfying QoS requirements, a typical capacity definition in CDMA systems, should be evaluated in both single cell and multiple cell environments, as system capacity is a basic problem to research resource management and CAC In this chapter, we tackle this issue in a CDMA. .. management The results of this chapter will be utilized in remaining chapters of this book to evaluate the Erlang capacity and propose the resource management schemes of CDMA systems In Chapter 3, sensitivity analysis of capacity parameters on CDMA system capacity is presented CDMA system capacity can be expressed as a function of various parameters such as required Eb/N0, traffic activity factor, processing... of system capacity such that real-time traffic is subject to CAC In [26], Sato et al analyzed the capacity of an integrated voice and data system over a CDMA unslotted ALOHA with channel load sensing protocol (CLSP) and investigated the effect of the threshold for the number of data transmissions on the capacity of CDMA unslotted ALOHA systems 1.2 Overview and Coverage The commercial CDMA systems are... imperfection due to the imperfect power control on the reverse link system capacity of multimedia CDMA systems are evaluated in explicit way In Chapter 4, the effect of traffic activity on the system capacity is analyzed As the capacity of a CDMA system is interference limited, any reduction of the interference improves the system capacity [18] One of the techniques to reduce the interference is to operate... in CDMA systems Subsequently, Erlang capacity is determined not only by the maximum number of simultaneous active users but also by the maximum number of CEs available for traffic channels In this book, we analyze the Erlang capacity of CDMA systems with the consideration of the limited number of CEs in BSs as well as without the limitation on the CEs in BSs First, Chapter 7 tackles the Erlang capacity . h0" alt="" CDMA Systems Capacity Engineering For a listing of recent titles in the Artech House Mobile Communications Series, turn to the back of this book. CDMA Systems Capacity Engineering Kiseon. that CDMA systems can support while maintaining desired QoS. The capacity of voice- only CDMA systems can be found [18]. In [19], V. K. Paulrajan et al. investigated the capacity of CDMA systems. hand, in the case of CDMA systems, transmit power constraints and the system’s self-generated interference ultimately restrict CDMA capacity, as CDMA systems tend to be capacity or coverage limited