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Presented by:
Rodger E. Ziemer

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3G CDMA - WCDMA and cdma2000
Rules for Efficient Multiple Access
Three laws
 Know the channel
 Minimize interference to others
 Mitigate interference received from others
 Requirements of wireless multiple access
 Channel measurement
 Channel control and modification
 Multiple user channel isolation
Why CDMA?
 Higher capacity
 Improved performance in multipath by diversity
 Lower mobile transmit power = longer battery life
 Power control
 Variable transmission rate with voice activity detection
 Allows soft handoff
 Sectorization gain
 High peak data rates can be accommodated
 Combats other-user interference = lower reuse factors
What is Third Generation? [1]
 Flexible support of multiple services
 Voice
 Messaging – email, fax, etc.
 Medium-rate multimedia – Internet access, educational
 High-rate multimedia – file transfer, video
 High-rate interactive multimedia – video telecon-ferencing, telemedicine, etc.
Mobility: quasi-stationary to high-speed platforms
 Global roaming: ubiquitous, seamless coverage
 Evolution from second generation systems
W-CDMA Versus cdma2000 [2]
 WCDMA Uplink Frame Structure [1]
 WCDMA Uplink Modulator Structure [1]
 Orthogonal Variable Spreading Factor Codes
 WCDMA Downlink Frame Structure [1]
 WCDMA Downlink Modulator Structure [1]
Transmit Diversity Strategy for Downlink
 cdma2000 Uplink Frame Structure
 cdma2000 Uplink Modulator
 cdma2000 Downlink Frame Structure
 cdma2000 1X DL Modulation Processing
 cdma2000 1X Downlink Modulation
 cdma2000 3X DL Modulation Processing
 cdma2000 3X Downlink Modulation
 cdma2000 vs WCDMA
 Chip rate
 Coherent Pilot Channels
 Transmit Diversity
 Underlying Network
 Single Carrier versus Multicarrier Spreading
 Cell Site Synchronization
WCDMA: More Information?
 21.101 à guide to all other documents
 25.XXX series à radio access network (RAN)
 25.211 à frame structure etc.
 25.212 à channel coding etc.
 25.213 à spreading and modulation
 25.214 à physical layer procedures (tx diversity, etc.)
 25.321 à medium access control (MAC)
 25.322 à radio link control (RLC)
 26.XXX series à voice coding
GSM/GPRS/EDGE: More Information?
cdma2000: More Information?
 Technical Specification Group C à cdma2000
 C.S0002-A-1 à Physical Layer Standard
 C.S0003-A-1 à Medium Access Control (MAC)
 C.S0004-A-1 à Signaling Link Access Control
 C.S00024 à 1XEV-DO (high speed packet)
 C.S0005 à Upper Layer Signaling (L3)

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