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Extra info for Wcdma: Towards Ip Mobility and Mobile Internet (Artech House Universal Personal Communications Series)

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3 Sometimes PDC is also referred as Pacific Digital Cellular. Introduction 13 The bit rate targets have been specified according to the integrated services digital network (ISDN) rates. 4 It may be, however, that the main IMT-2000 services are not ISDN-based services. It has to be noted that these figures have been subject to considerable debate. Ultimately, market demand will determine what data rates will be offered in commercial systems. 5 describes the relation between bit rates and mobility for the secondand third-generation systems.

W. Baier, ìO n the Effects of Quantization, Nonlinear Amplification and Band Limitation in CDMA Mobile Radio Systems Using Joint Detection,î Proceedings of the Fifth Annual International Conference on Wireless Communications WIRELESSí93, Calgary, Canada, 1993, pp. 173ñ186. , J. J. Blanz, M. M. Naflhan, and P. W. Baier, ì Simulation of the Uplink of JD-CDMA Mobile Radio Systems with Coherent Receiver Antenna Diversity,î Wireless Personal Communications, Vol. 1, 1994, pp. 61ñ89. Wales, S. K. LINK Personal Communications Programme: A DSCDMA Air Interface for UMTS,î Proceedings of RACE Mobile Telecommunications Summit, Cascais, Portugal, November 1995.

Several wideband CDMA proposals have been made for third-generation wireless systems. They can be characterized by the following new advanced properties: Provision of multirate services; Packet data; Complex spreading; A coherent uplink using a user dedicated pilot; Additional pilot channel in the downlink for beamforming; Seamless interfrequency handover; Fast power control in the downlink; Optional multiuser detection. Introduction 23 The two wideband CDMA schemes for third-generation are WCDMA, which is network asynchronous, and cdma2000, which is synchronous.

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