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Consider the following statements:
1. The figure of merit of DSB-SC and SSB receivers with coherent detection is 1.
2. The figure of merit of an AM receiver with envelope detection is more than 1.
3. If the average modulated signal power and the average noise power in the message bandwidth is same as that of DSB-SCreceiver then the output SNR and figure of merit of SSB coherent receiver is same as that of the DSB SC receiver.
4. A square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator.
Which of the above statements are correct?
  • a)
    1, 3 and 4
  • b)
    2 and 4
  • c)
    1, 2 and 4
  • d)
    2 and 3
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following statements:1. The figure of merit of DSB-SC and...
  • Statement-1 is correct.
  • The figure of merit of an AM receiver with envelope detection is less than 1.

    Hence, statement-2 is false.
  • Statement-3 and 4 are correct.
View all questions of this test
Most Upvoted Answer
Consider the following statements:1. The figure of merit of DSB-SC and...
Correct Statement Explanation:

1. The figure of merit of DSB-SC and SSB receivers with coherent detection is 1:
This statement is true as both DSB-SC and SSB receivers with coherent detection have a figure of merit of 1. This is because coherent detection helps in eliminating the carrier signal and hence the noise power is reduced by half. This results in a figure of merit of 1.

2. The figure of merit of an AM receiver with envelope detection is more than 1:
This statement is false as the figure of merit of an AM receiver with envelope detection is less than 1. This is because envelope detection results in the loss of half of the signal power and hence the figure of merit is less than 1.

3. If the average modulated signal power and the average noise power in the message bandwidth is same as that of DSB-SC receiver then the output SNR and figure of merit of SSB coherent receiver is same as that of the DSB SC receiver:
This statement is true as the output SNR and figure of merit of SSB coherent receiver is same as that of DSB SC receiver when the average modulated signal power and the average noise power in the message bandwidth is same.

4. A square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator:
This statement is true as a square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator. This is because a square-law demodulator is less affected by noise and hence can operate on weaker signals.

Therefore, the correct statements are 1, 3 and 4.
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Consider the following statements:1. The figure of merit of DSB-SC and SSB receivers with coherent detection is 1.2. The figure of merit of an AM receiver with envelope detection is more than 1.3. If the average modulated signal power and the average noise power in the message bandwidth is same as that of DSB-SCreceiver then the output SNR and figure of merit of SSB coherent receiver is same as that of the DSB SC receiver.4. A square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator.Which of the above statements are correct?a)1, 3 and 4b)2 and 4c)1, 2 and 4d)2 and 3Correct answer is option 'A'. Can you explain this answer?
Question Description
Consider the following statements:1. The figure of merit of DSB-SC and SSB receivers with coherent detection is 1.2. The figure of merit of an AM receiver with envelope detection is more than 1.3. If the average modulated signal power and the average noise power in the message bandwidth is same as that of DSB-SCreceiver then the output SNR and figure of merit of SSB coherent receiver is same as that of the DSB SC receiver.4. A square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator.Which of the above statements are correct?a)1, 3 and 4b)2 and 4c)1, 2 and 4d)2 and 3Correct answer is option 'A'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about Consider the following statements:1. The figure of merit of DSB-SC and SSB receivers with coherent detection is 1.2. The figure of merit of an AM receiver with envelope detection is more than 1.3. If the average modulated signal power and the average noise power in the message bandwidth is same as that of DSB-SCreceiver then the output SNR and figure of merit of SSB coherent receiver is same as that of the DSB SC receiver.4. A square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator.Which of the above statements are correct?a)1, 3 and 4b)2 and 4c)1, 2 and 4d)2 and 3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:1. The figure of merit of DSB-SC and SSB receivers with coherent detection is 1.2. The figure of merit of an AM receiver with envelope detection is more than 1.3. If the average modulated signal power and the average noise power in the message bandwidth is same as that of DSB-SCreceiver then the output SNR and figure of merit of SSB coherent receiver is same as that of the DSB SC receiver.4. A square-law demodulator operates above threshold on a weaker signal than with an envelope demodulator.Which of the above statements are correct?a)1, 3 and 4b)2 and 4c)1, 2 and 4d)2 and 3Correct answer is option 'A'. Can you explain this answer?.
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