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Frequency Hopping Spread Spectrum (FHSS)

FHSS vs. DSSS page 1 of 16 sorin m. schwartz seminarssorin m. schwartz seminars Frequency Hopping Spread Spectrum (FHSS) vs. direct sequence Spread Spectrum (DSSS) in Broadband Wireless Access (BWA) and Wireless LAN (WLAN) by Sorin M. SCHWARTZ Scope In 1997 IEEE defined the Wireless LAN (WLAN) standard, intended to allow wireless connection of workstations to their base LAN. The original standard targeted the case in which both the workstation and the LAN were owned by the same entity, providing in fact a wireless extension to an existing, wired LAN.

Two main Spread Spectrum modulation techniques are defined: Frequency Hopping Spread Spectrum (FHSS) and Direct Sequence Spread Spectrum (DSSS). By transmitting the message energy over a bandwidth much wider than the minimum required, Spread Spectrum modulation techniques present two major advantages: low power density and redundancy.

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  Spectrum, Direct, Frequency, Sequence, Spreads, Hopping, Frequency hopping spread spectrum, Direct sequence spread

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