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FHSS and DSSS
written 9.0 years ago by gravatar for teamques10 teamques10 ★ 70k •   modified 9.0 years ago

Mumbai University > Information Technology > Sem 7 > Wireless Technology

Marks: 5M

Year: Dec 2015
wireless technology
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written 9.0 years ago by gravatar for teamques10 teamques10 ★ 70k

FHSS: frequency hopping spread spectrum

devices will transmit signal by changing or hopping from one frequency to another in a random but predictable sequence.

  • Channels: specific hop pattern (26 diff hop pattern)
  • Dwell time: 100 milliseconds
  • Hop time: microseconds

enter image description here

DSSS: direct sequence spread spectrum

DSSS phase shifts a sinewave pseudo …

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