1 / 16

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.

stamos
Download Presentation

presented by: Souhaibe Barkat

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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?

More Related