Communication Systems - Section 1 (5)
Communication Systems - Section 1
| 33. |
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Answer: Option B Explanation: It generates FM through phase modulation. |
| 34. |
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Answer: Option C Explanation: x(t) = cos t + 0.5 not satisfies the Dirichlet condition. The integration of constant term is ∞ |
| 35. |
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Answer: Option C Explanation: PRF in radar systems means pulse repetition frequency. |
| 36. | Assertion (A): Free space does not interfere with normal radiation and propagation of radio waves Reason (R): Free space has no magnetic or gravitational fields.
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Answer: Option A Explanation: Since free space does not have magnetic and other fields, waves can propagate without any interference. |
| 37. | Tracking of extra terrestrial objects requires |
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Answer: Option D Explanation: All the three are required. |
| 38. | Non-coherently detection is not possible for |
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Answer: Option A Explanation: No answer description available for this question. Let us discuss. |
| 39. | c(t) and m(t) are used to generate an FM signal. If the peak frequency deviation of the generated FM signal is three times the transmission bandwidth of the AM signal, then the coefficient of the term cos [2p(1008 x 103t)] in the FM signal (in terms of the Bessel Coefficients) is |
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Answer: Option D Explanation: |
J8(3)
Frequency deviation = 3 . (AM Bandwidth) = 6 fm
| 40. | A 400 W carrier is amplitude modulated with m = 0.75. The total power in AM is |
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