| Channel Bandwidth | 5 MHz |
| Duplex Mode | FDD and TDD |
| Downlink RF Channel Structure | Direct Spread (DS) |
| Chip Rate | 3.84 Mcps |
| Frame Length | 10 ms |
| Spreading Modulation | Balanced QPSK (downlink) |
| Dual-channel QPSK (uplink) | |
| Complex spreading circuit | |
| Coherent detection | • User dedicated time multiplexed pilot (downlink and uplink) |
| • common pilot in downlink | |
| Channel Multiplexing in Downlink | Data and control channel are multiplexed |
| Channel Multiplexing in Uplink | • Control and pilot channel time multiplexed |
| • I&Q multiplexing for data and control channel | |
| Multirate | Variable spreading and multicode |
| Spreading (uplink) | OVSF sequences. Gold sequence 241 for user separation (different time shifts in I and Q channel, truncated cycle 10 ms) |
| Spreading (downlink) | OVSF sequences for channel separation. Gold sequences 218-1 for cell and user separation (truncated cycle 10 ms) |
| Spreading Factors | 4-256 (uplink), 4-512 (downlink) |
| Power Control | Open and fast closed loop (1.6 kHz) |
| Handover | Soft handover, Inter-frequency handover, etc. |
| Data Modulation | QPSK (downlink), BPSK (uplink) |
| Channel Coding | Convolutional and turbo codes |
Specifications of WCDMA
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