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📝 Direct Sequence Spread Spectrum Technique

📖 From Data Communication & Networks • 6. Multiplexing and Spectrum Spreading • 11 questions available

Practice MCQs for Direct Sequence Spread Spectrum Technique. 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
2
Hard Questions

📝 Sample Questions

Q1. What is the main function of Direct Sequence Spread Spectrum (DSSS) in a communication system?

🔹 A. Increase data rate
🔹 B. Spread signal over wider bandwidth for resistance to interference
🔹 C. Reduce power consumption
🔹 D. Convert analog signals to digital

💡 Difficulty: easy | ✅ Correct: B

Q2. Suppose a link has total bandwidth of 200 MHz, and each of 5 users is allocated an equal portion via DSSS. If each user’s spread signal occupies 30 MHz, what can be inferred about the remaining bandwidth?

🔹 A. 50 MHz remains unused and could serve as guard band or future channels
🔹 B. No bandwidth remains; system is fully utilized
🔹 C. Remaining bandwidth must be allocated equally to each user, reducing their portion
🔹 D. The system must reduce each user’s bandwidth to fit within 200 MHz

💡 Difficulty: medium | ✅ Correct: A

Q3. A DSSS transmitter increases its chip rate while keeping the data rate constant. How does this change affect the probability of a narrowband interferer corrupting a bit, assuming interferer bandwidth stays the same?

🔹 A. Probability increases because higher chip rate widens the signal
🔹 B. Probability decreases because higher chip rate spreads the signal more, making narrowband interference less likely to affect a bit
🔹 C. Probability remains unchanged because interferer bandwidth is constant
🔹 D. Probability fluctuates unpredictably

💡 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📝 Spread Spectrum (SS) in Physical Layer
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