By Samuel C. Yang
CDMA2000 is of serious curiosity to instant communications pros simply because this 3G (third iteration) typical presents for quicker info charges, always-on facts carrier, and stronger voice community means. Breaking down advanced expertise into easy-to-understand options, this hands-on, system-level source deals RF (radio frequency) and instant process engineers specialist tips in designing, optimizing, and working a CDMA2000 instant community.
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Extra resources for 3G CDMA2000 : wireless system engineering
Garg, V. , IS-95 CDMA and cdma2000: Cellular/PCS Systems Implementation, Upper Saddle River, NJ: Prentice Hall PTR, 2001. 1 Introduction As described in Chapter 2, the physical layer is responsible for transmitting and receiving bits (organized in frames) over the physical medium. As such, the layer performs functions such as coding, modulation, and channelization. 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.
Each base station sector has only one forward pilot channel. 2. 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).
6 instead of using a single slot duration of 80 ms (like the paging channel and the forward common control channel), the F-BCCH can have slots that last 40 ms, 80 ms, or 160 ms. In addition, unlike the paging channel and the forward common control channel the F-BCCH has only one frame format that lasts 40 ms. Therefore, it is obvious that a 160-ms slot always contains four frames, an 80-ms slot always contains two frames, and a 40-ms slot always contains one frame. An F-BCCH frame always lasts 40 ms and always contains 744 information bits, 16 CRC bits, and 8 encoder tail bits, resulting in a total of 768-bits-per-frame.