Radio Amateur Quiz Canadian License

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Question A-005-009-003

What term is used to describe a spread spectrum communications system in which a very fast binary bit stream is used to shift the phase of an RF carrier?

Correct Answer

Direct sequence

Explanation

Direct Sequence Spread Spectrum (DSSS) multiplies the data signal by a much higher rate pseudorandom binary sequence (chipping code), which spreads the signal's spectrum by phase modulating the carrier.

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