| Publisher | VOCAL Technologies | ||
|---|---|---|---|
| Format | 90.1KB PDF | Date added | 23 Oct 2003 |
| Topics | Wireless LAN, Wi-Fi (802.11) | ||
| Downloads | 86 | ||
The IEEE 802.11b is a Direct Sequence Spread Spectrum (DSSS) system very similar in concept to the CDMA Wireless, using a spread spectrum chip sequence. In the IEEE 802.11b the transmission medium is wireless and the operating frequency band is 2.4 GHz. IEEE 802.11b provides 5.5 and 11 Mbps payload data rates in addition to the 1 and 2 Mbps rates provided by 802.11. To provide the higher rates, 8 chip Complementary Code Keying (CCK) is employed as the modulation scheme. The CCK uses 6 bits to encode the code sent, this increase the speed of the 802.11 by 6.
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