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Հարց 115

What effect does multi-path propagation have on data transmissions?

  1. Transmission rates must be increased by a factor equal to the number of separate paths observed
  2. Transmission rates must be decreased by a factor equal to the number of separate paths observed
  3. No significant changes will occur if the signals are transmitted using FM
  4. Error rates are likely to increaseՃիշտ պատասխան

Բացատրություն

Multipath delivers delayed copies of the same transmission, so a symbol arriving late overlaps the next one and corrupts it. The result is a higher error rate, and simply changing the transmission rate or using FM does not remove the delayed copies.

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Հարց 115: What effect does multi-path propagation have on data… · FCC Technician Class (Element 2) · Questena