1. presented by: Souhaibe Barkat
University of Colorado at Boulder
Wideband Code Division and Multiplication Access
December 11th , 2006
presented by: Souhaibe Barkat

2. 1. WCDMA Use 3rd generation cellular network
Sprint, AT&T, Nokia, and Ericsson
More bandwidth means more capabilities

3. 2. Frequency Band Allocation
In The United States
Uplink
Downlink
Total
WCDMA
2x60 MHz
In Europe and Japan
Uplink
Downlink
Total
UMTS-FDD
2x60 MHz
UMTS-TDD
20+15 MHz

4. 3. Standard Body
Concept formed by FRAMES research project with Panasonic, Fujitsu, and NEC + many other
(FRAMES) Future Radio Wideband Multiple Access System
Uplink physical layer adopted by FRAMES
Downlink was modified by several companies

5. 4. Information Bits and Modulation
Baseband Transmitter

6. 4. Information Bits and Modulation
Baseband Receiver

7. 5. Error Control Coding
Convolutional encoding for MPEG4 >> BER of 10^-3
Turbo encoding for data application >> BER of 10^-6

8. 6. Constellations Used QPSK for downlink transmission
16QAM is used for HS-DSCH to provide higher speed data
HS-DSCH: High Speed Dedicated Physical Control Channel

9. WCDMA Receiver
RAKE Receiver

10. 7. IQ Modulator
I-Q Uplink Modulator

11. I-Q Downlink Modulator
7. IQ Modulator
I-Q Downlink Modulator

12. 8. Pulse Shape Used
Root Raised Cosine with roll-off = 0.22

13. 9. Broadcast Technology Used
WCDMA does both FDD and TDD
Uplink: Multiple users send signals to the base station
Downlink: Base station sends different signals to different users

14. 10. Multi-Antenna Technology
Transmitter
Receiver

15. 11. Major Players Alcatel Ericsson Lucent Motorola Nokia Nortel
Siemens/NEC

16. Questions?