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presented by: Souhaibe Barkat

presented by: Souhaibe Barkat. University of Colorado at Boulder. Wideband Code Division and Multiplication Access. December 11 th , 2006. 1. WCDMA Use. 3 rd generation cellular network Sprint, AT&T, Nokia, and Ericsson More bandwidth means more capabilities. 2. Frequency Band Allocation.

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presented by: Souhaibe Barkat

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

  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 In Europe and Japan

  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. 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?

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