What is one of the advantages frequency-shift...

Question 1 / 27070qiVfL8WQkoXUyvwaLhx3

Question 1 of 27070qiVfL8WQkoXUyvwaLhx3

What is one of the advantages frequency-shift keying has over "on-off" keying?

Question 1 of 27070

What is one of the advantages frequency-shift keying has over "on-off" keying?

🔍 Key Concepts

• Frequency-shift keying (FSK) vs on-off keying (OOK) in digital modulation • How noise affects a signal that is always present vs a signal that turns completely off • Relationship between signal-to-noise ratio (SNR) and the reliability of detecting a signal

💭 Think About

• When a signal is completely turned off for a 0 bit, how might random noise in the receiver make it harder to tell the difference between a true 0 and just a weak or noisy signal? • If a signal is always present but changes frequency to indicate 1s and 0s, what does that allow the receiver to look for in order to distinguish data from noise? • Think about whether better noise immunity would show up as an increase or decrease in signal-to-noise ratio.

✅ Before You Answer

• Recall that signal-to-noise ratio (SNR) measures how strong the signal is compared to background noise; better performance usually means higher SNR at the detector. • Consider whether FSK tends to require more or less bandwidth than a simple on/off keyed carrier. • Verify which option(s) reflect improved detectability in noise and which reflect a worsening of performance.

Question 1 of 27070

What is one of the advantages frequency-shift keying has over "on-off" keying?

Increase of transmitter bandwidth

Decrease of signal-to-noise ratio

Increase of signal-to-noise ratio

Both A and C

Question 1 / 27070qiVfL8WQkoXUyvwaLhx3

Question 1 of 27070qiVfL8WQkoXUyvwaLhx3

What is one of the advantages frequency-shift keying has over "on-off" keying?

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Question 1 of 27070

What is one of the advantages frequency-shift keying has over "on-off" keying?