Extra exam question E8D01
Subelement E8, SIGNALS AND EMISSIONS· Group E8D
Why are received spread spectrum signals resistant to interference?
- A.Signals not using the spread spectrum algorithm are suppressed in the receiver (correct answer)
- B.The high power used by a spread spectrum transmitter keeps its signal from being easily overpowered
- C.Built-in error correction codes minimize interference
- D.If the receiver detects interference, it will signal the transmitter to change frequencies
WhyReceived spread spectrum signals resist interference because signals not using the spread spectrum algorithm are suppressed in the receiver. Received spread spectrum signals resist interference because the receiver's despreading process is matched to the specific spreading algorithm the transmitter used, so any ordinary signal not using that same algorithm gets suppressed rather than reconstructed, effectively rejected as noise by the correlation process, answer A. It isn't about using especially high transmit power, isn't built-in forward error correction doing the work, and doesn't rely on the receiver signaling the transmitter to change frequency, that describes a completely different adaptive technique.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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