This lecture presents a general WCDMA or UTRA (Universal
Terrestrial Radio Access) FDD (Frequency Division Duplex)
physical layer issues.
• Spreading and Scrambling
• Transport Channels
• Physical Channels
• Signaling
• Physical Layer Procedures
• Spreading means increasing the signal bandwidth
• Strickly speaking, spreading includes two operations:
• Channelisation (increases signal bandwidth) - using orthogonal
codes
• Scrambling (does not affect the signal bandwidth) - using pseudonoise
codes
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