Ultrawideband (UWB) Wireless
• Brief UWB Overview
• Evolution of UWB Modulation Methods
• Spectral Sculpting and OFDM
• UWB as Precursor to Cognitive Radio
Ultrawideband (UWB) Technology
What is UWB?
• Unique RF technology formerly
classified for military applications
• Declassified in mid 90s with Feb, 2002
FCC commercial use approval
• Uses wide spectrum (3.1-10.6 GHz)
• Initially narrow-pulse-based; now many
favor OFDM-based modulation
What is compelling about UWB?
• Supports datacom speeds greater than
100 Mbps within 10m radius
– OFDM supports 480 Mbps at 2 meters;
multi-Gbps speeds for the future
• Can determine range between devices
to within a few inches
• CMOS, low power, low cost designs
plausible
