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📝 Spread Spectrum (SS) in Physical Layer

📖 From Data Communication & Networks • 6. Multiplexing and Spectrum Spreading • 12 questions available

Practice MCQs for Spread Spectrum (SS) in Physical Layer. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-31

4
Easy Questions
5
Medium Questions
3
Hard Questions

📝 Sample Questions

Q1. What does FHSS stand for?

🔹 A. Frequency Hopping Signal System
🔹 B. Frequency Hopping Spread Spectrum
🔹 C. Fast Hopping Spread Spectrum
🔹 D. Frequency High Speed Spread

💡 Difficulty: easy | ✅ Correct: B

Q2. If a jammer continuously transmits noise on a specific carrier frequency f_j, how does FHSS reduce the probability that a transmitted symbol is corrupted?

🔹 A. It never uses f_j
🔹 B. It spends only a fraction 1/M of time on f_j
🔹 C. It encrypts the data
🔹 D. It increases transmission power

💡 Difficulty: medium | ✅ Correct: B

Q3. An FHSS system uses M = 16 carrier frequencies and a hopping period T_h = 1 ms. The pseudorandom sequence repeats every 256 hops. What is the minimum number of bits needed to generate this sequence?

🔹 A. 4 bits
🔹 B. 8 bits
🔹 C. 12 bits
🔹 D. 16 bits

💡 Difficulty: hard | ✅ Correct: B

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🔗 Related Topics

📝 Multiplexing techniques and its role in Physical Layer📝 Frequency Division Multiplexing Analog Technique📝 Wavelength Division Multiplexing Technique📝 Time Division Multiplexing Technique📝 Frequency Hopping Spread Spectrum Technique
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