3G CDMA2000 : wireless system engineering - download pdf or read online

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) commonplace offers for swifter information premiums, always-on facts carrier, and superior voice community means. Breaking down advanced expertise into easy-to-understand recommendations, this hands-on, system-level source bargains RF (radio frequency) and instant method engineers specialist information in designing, optimizing, and working a CDMA2000 instant community.

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Example text

After block interleaving, the symbols undergo long code scrambling, then a gain for that physical channel is applied (the gain is determined by forward power control). In addition, if the physical channel is a forward dedicated control channel or a forward fundamental channel then power control bits can be punctured into the symbol stream. 13 Conceptual block diagram of broadcast control channel4, common assignment channel, and forward common control channel. 4. Broadcast control channel has a sequence repetition function between block interleaver and long code scrambler.

15 shown. sin(2πfct) BF: Baseband filter Complex modulation: Forward link. 15). 15 collapses back to that of IS-95. 16. In this case, I is the only symbol stream, which is duplicated on both the in-phase and the quadrature branches of the QPSK modulator. In fact, Radio Configurations 1 and 2 are implemented in IS-2000 by zeroing out the Q symbol stream. 16 Collapsed complex modulation as in the cases of Radio Configuration 1 and Radio Configuration 2. 7 Capacity Gain: Forward Link One reason IS-2000 has a higher physical layer capacity than IS-95 is because IS-2000 uses QPSK whereas IS-95 uses BPSK6.

5. Forward supplemental channel does not have punctured power control bits. 15 shown. sin(2πfct) BF: Baseband filter Complex modulation: Forward link. 15). 15 collapses back to that of IS-95. 16. In this case, I is the only symbol stream, which is duplicated on both the in-phase and the quadrature branches of the QPSK modulator. In fact, Radio Configurations 1 and 2 are implemented in IS-2000 by zeroing out the Q symbol stream. 16 Collapsed complex modulation as in the cases of Radio Configuration 1 and Radio Configuration 2.

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


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