In 802.11b, the 1 Mbps data rate usesDirect Sequence Spread Spectrum (DSSS)with an 11-bit Barker code. Each bit of data is represented by an 11-chip sequence, resulting in a chip rate of:
1 Mbps × 11 chips/bit = 11 Mchips/s
However, thechip raterefers to the rate at which the chips (the smaller units of data in DSSS) are transmitted. For 802.11b, the chip rate is11 Mchips/sfor the 1 Mbps data rate.
[Reference:CWDP-305 Study Guide, Chapter on ProtocolandSpectrum Analysis – 802.11b Modulation Techniques., , ]
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