Labels:text | screenshot | rectangle | diagram | parallel | number OCR: FREQUENCY HOPPING VS. DIRECT SPREAD SPECTRUM TECHNOLOGY Frequency Hopping Spread spectrum ( Fuss) Dirot Stabenice Spiinad Sboctrain (DSSS) 50 deta bite word for eachi 40 Frequency slots 20 Same chip code for "zero " date bit Time Figure 2. Frequency Hopping Spread Spectrumn (FHSS) and Direct Sequence Spread Spectrum (DSSS) are the two rato-frequency. Physical (PHY ) lovers defined in the IEEE 802. 11 standard. FHSS changes frequency at set intervals, making it difficult for eavesdroppers to intercept a transmission. DSSS spreads a transmission over a wide part of the frequency band; it crentes a redundant bit partern for each transmitted bit, and if any chips are damaged, the original data can be recovered without retransmitting.
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