ocr: FREQUENCY HOPPINGVS. DIRECT SPRERD SPECTRUM ECHNOLOGY Fhequency-hopping Spread Spectrum: FRSS) DirectSequence Spead Spoctrum (0S59) 00 Zero data: bet 63 10chip code word for each one catadit 40 20 Same chip code: - - o S - tor wordi "zero out data: nverted bit: 2 2 3 5 6 ime Sowce Mrels WNANnce Figure 2. Frequency Hoppang Spread Spectrum FHSS) and: Direct Sequence Sprean Spectrim DSSS), are thes hep nadio-frequency Physical (PHY)layers defined in the IEEE 80211 standard. FASS changes frequency at set intormais, naking If dificalt for eavesdroppers to intercept: a fransmussion. DSSSspreads A Ta ...
