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

By Samuel C. Yang

CDMA2000 is of serious curiosity to instant communications pros simply because this 3G (third iteration) common presents for speedier info charges, always-on information provider, and more desirable voice community means. Breaking down complicated expertise into easy-to-understand innovations, this hands-on, system-level source bargains RF (radio frequency) and instant process engineers professional tips in designing, optimizing, and working a CDMA2000 instant community.

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Extra info for 3G CDMA2000 : wireless system engineering

Sample text

1 shows the categorization of these reverse link channels. 1 Categories of reverse link physical channels. Legacy IS-95 physical channels are denoted with asterisks. 1 shows a list of physical channels used by the physical layer. 1 and is reproduced here for completeness. Note that asterisked channel designations show those channels that also exist in IS-95. Also, boldfaced channel names show those channels that are collectively known as the IS-2000 traffic channels since these channels can all carry user traffic data in IS-2000 systems.

1 Introduction The physical layer is responsible for transmitting and receiving bits (organized in frames) over the physical medium. The physical layer carries out coding functions to enable error correction and detection at the bit and frame levels. , modulation) and vice versa to enable their transmission over the air. In addition to coding and modulation, the physical layer also carries out the channelization function by which different users of the system can be distinguished from one another.

In a quick paging channel slot, the mobile always monitors two paging indicators. , y2 and y4). So in our example, if two mobiles are both assigned paging channel slot Y, the first mobile may monitor a paging indicator in y1 and a paging indicator in y3; the second mobile may monitor a paging indicator in y2 and a paging indicator in y4. In actuality, the exact position of a paging indicator in the 20-ms portion is determined by a hash algorithm, the same type of algorithm that determines the assigned paging channel slot for a mobile operating in the slotted mode.

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