Read e-book online 3G CDMA2000 : wireless system engineering PDF

By Samuel C. Yang

ISBN-10: 1580537588

ISBN-13: 9781580537582

CDMA2000 is of serious curiosity to instant communications execs simply because this 3G (third new release) common offers for speedier information premiums, always-on facts carrier, and more suitable voice community means. Breaking down advanced know-how into easy-to-understand options, this hands-on, system-level source bargains RF (radio frequency) and instant procedure engineers specialist suggestions in designing, optimizing, and working a CDMA2000 instant community.

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As a result, the mobile often does not receive its designated pages immediately. From the mobile’s perspective, while the mobile saves some battery power by only monitoring its assigned slot, the assigned slot still lasts 80 ms. At the beginning of its assigned slot, the mobile still has to wake up to monitor the entire 80-ms slot, and most of the time there is no page directed at the mobile. In IS-2000, the F-QPCH is added to alleviate the drawbacks cited above. If there is a page directed to a mobile, the base station first uses the F-QPCH to send shorter paging indicator bits to the mobile.

See Chapter 9 on the generation of Walsh codes. 2 25 Transmit Diversity Pilot Channel (F-TDPICH) The F-TDPICH is a new signaling channel in IS-2000. This channel is identified by Walsh code w 128 16 . It also carries no baseband information in that the baseband sequence is a stream of 1s that are spread by Walsh code w 128 16 . The transmit diversity pilot channel works with the forward pilot channel to support transmit diversity on the forward link (see Chapter 9). Each base station sector can have at most one transmit diversity pilot channel.

This chapter deals with the physical channels that exist on the reverse link of the IS-2000 system, and their descriptions are organized into two broad categories: signaling channels and user channels. Like their forward link counterparts, the signaling channels can also be classified into two types, dedicated and common channels, depending on whether or not the channel is assigned to only one user or can be used by multiple users. The R-DCCH is an example of a dedicated signaling channel. On the other hand, the R-CCCH, the R-ACH, and the R-EACH are examples of common signaling channels.

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3G CDMA2000 : wireless system engineering by Samuel C. Yang


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