wireless standards
l Wireless LAN
¤ research 802.11b 2.4 GHz, CCK-QPSK 11 Mb/s raw
¤ research 802.11g 2.4 GHz, OFDM 22/54 Mb/s raw
¤ research 802.11a 5.2-5.8 GHz, OFDM 54 Mb/s raw
¤ Range in theory 20-50 m
¤ Net rate at ~15-20 m NLOS ~ 1/4th of raw rate
¢ Effective bit rate still only moderate
l Wireless PAN
¤ Bluetooth 2.4 GHz, GFSK 1 Mb/s raw
¤ Zigbee 2.4 GHz 300 kb/s raw
¤ Range around 10 m
¤ Cable replacement: cost targets extremely low
¢ Application-free, fully integrated solutions targeted
Ultra Wide-Band (UWB)
l Very high speed Wireless PAN
¤ 100-200-400-1000 Mb/s tageted in steps
¤ “wireless USB” and “wireless 1394”
¤ 3-10 GHz pulsed transmission at very low power
¤ Range targets 10-3 m