Basic HTML version of Foils prepared Dec. 6 98

Foil 37 Wireless LAN (1)

From Introduction to Local Area Networks LANs Lectures at Xi'an Jaotong University -- Sept 1998. by Roman Markowski
standard: IEEE 802.11
types of implementation:
  • DSSS -- Direct Sequence Spread Spectrum (higher performance)
  • FHSS -- Frequency Hopping Spread Spectrum (lower cost)
OSI Physical layer (Access Point, antennas, LAN interfaces)
  • radio-frequency-based -- FCC license not required for the following frequencies 902-928 MHz, 2.4-2.4835 GHz, 5.725-5.850 GHz
  • infrared-based -- no government regulations

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