Virtual Labs

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

1. How does binary Frequency Shift Keying (BFSK) differentiate between binary 0 and 1?

a: By using different amplitudes for binary 0 and 1. Explanation

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b: By using different phases for binary 0 and 1. Explanation

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c: By using two distinct frequencies for binary 0 and 1. Explanation

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d: By using a combination of amplitude and phase shifts. Explanation

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2. In Phase Shift Keying (PSK), what does the term 'constellation diagram' refer to?

a: A diagram showing different frequency levels used in modulation. Explanation

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b: A plot representing the complex envelope of the modulated signal. Explanation

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c: A diagram showing various amplitude levels used in modulation. Explanation

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d: A plot representing the time domain representation of the signal. Explanation

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3. What is a major disadvantage of Amplitude Shift Keying (ASK)?

a: High power consumption Explanation

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b: High susceptibility to noise Explanation

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c: Complex implementation Explanation

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d: High bandwidth requirement Explanation

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4. Which digital modulation technique is more robust to non-linear distortion?

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: All are equally robust Explanation

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5. Which modulation technique is often used for radio frequency (RF) applications due to its robustness to interference?

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 Code Modulation (PCM) Explanation

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6. What is the primary disadvantage of Binary Phase Shift Keying (BPSK) in comparison to other modulation techniques?

a: BPSK requires higher bandwidth. Explanation

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b: BPSK is less noise-resistant. Explanation

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c: BPSK supports lower data rates. Explanation

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d: BPSK is more complex to implement. Explanation

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7. Which modulation technique is typically used in Bluetooth communication?

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: Time Division Multiplexing (TDM) Explanation

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8. In digital communication, what is the primary purpose of using modulation techniques such as ASK, FSK, and PSK?

a: To decrease the bandwidth requirement. Explanation

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b: To increase the complexity of the system. Explanation

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c: To adapt the signal for transmission over various media. Explanation

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d: To minimize power consumption. Explanation

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9. How does non-coherent FSK differ from coherent FSK?

a: Non-coherent FSK requires carrier phase synchronization. Explanation

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b: Non-coherent FSK does not require carrier phase synchronization. Explanation

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c: Non-coherent FSK uses a single frequency for all bits. Explanation

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d: Non-coherent FSK is more complex to implement. Explanation

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10. In PSK, what is the result of increasing the number of phase states in terms of data transmission?

a: Decreases the data rate. Explanation

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b: Increases the error rate. Explanation

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c: Increases the data rate. Explanation

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d: Decreases the bandwidth requirement. Explanation

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