Virtual Labs

Amplitude shift keying, Frequency Shift Keying, Binary Phase Shift Keying: Generation and Detection

1. In a coherent Frequency Shift Keying (FSK) system, what is the primary challenge in achieving coherent detection?

a: Maintaining phase synchronization between transmitter and receiver Explanation

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b: Ensuring the amplitude of the carrier signals remain constant Explanation

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c: Minimizing frequency deviation Explanation

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d: Reducing the noise floor of the system Explanation

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2. Which of the following is a major disadvantage of Amplitude Shift Keying (ASK)?

a: Susceptibility to noise and interference Explanation

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b: Complexity of implementation Explanation

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c: High bandwidth requirements Explanation

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d: Inability to use high-frequency carriers Explanation

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3. Which modulation scheme is typically more bandwidth-efficient?

a: Amplitude Shift Keying (ASK) Explanation

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b: Frequency Shift Keying (FSK) Explanation

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c: Phase Shift Keying (PSK) Explanation

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d: Pulse Amplitude Modulation (PAM) Explanation

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4. In Phase Shift Keying (PSK), what is the impact of increasing the number of phase states?

a: Increased robustness to noise Explanation

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b: Reduced bandwidth requirement Explanation

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c: Higher data rates Explanation

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d: Simpler receiver design Explanation

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5. Which of the following is a key advantage of using Non-Coherent FSK over Coherent FSK?

a: Simpler receiver design Explanation

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b: Higher data transmission rates Explanation

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c: Lower power consumption Explanation

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d: Better performance in noisy environments Explanation

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6. Why is Phase Shift Keying (PSK) considered more power efficient than Frequency Shift Keying (FSK)?

a: PSK can maintain performance at lower signal-to-noise ratios. Explanation

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b: PSK requires less bandwidth. Explanation

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c: PSK is simpler to implement. Explanation

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d: PSK does not require frequency modulation. Explanation

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7. Which characteristic of FSK modulation makes it advantageous for certain applications?

a: Its resistance to phase jitter Explanation

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b: Its robustness in high-noise environments Explanation

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c: Its ability to encode more data per symbol Explanation

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d: Its minimal bandwidth requirement Explanation

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8. What is the primary disadvantage of using higher-order PSK modulation schemes?

a: Increased bandwidth usage Explanation

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b: Higher power consumption Explanation

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c: Increased sensitivity to noise Explanation

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d: Greater amplitude variations Explanation

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9. Which modulation scheme is typically used in radio broadcasting?

a: Amplitude Shift Keying (ASK) Explanation

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b: Frequency Modulation (FM) Explanation

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c: Phase Shift Keying (PSK) Explanation

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d: Frequency Shift Keying (FSK) Explanation

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10. In a PSK system, what can be used to improve error performance?

a: Increasing the carrier frequency Explanation

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b: Using error correction coding Explanation

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c: Reducing the modulation order Explanation

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d: Increasing the power of the transmitted signal Explanation

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