Wireless LAN (1)

• 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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