LMDS Fixed Services Why OFDM/OCDMA/SA ?
Sectored Antenna at the hub for uplink and downlink:
- Reduced interference and increased capacity
OFDM-OCDMA:
- High bandwidth efficiency: overlapping sub-carriers
- High capacity and simple access scheme
- Robust against multipath effects
- Low-cost frequency source:FFT/IFFT all-digital implementation; a single mm-wave carrier for the entire network (uplink and downlink)
- Increased accessibility: both LOS and some Non-LOS
- Adaptive modulation for sub-channels
- High flexibility in support of multi-rate services