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 |