- Can You Solve This Question 1 (118.58 KiB) Viewed 21 times
Can you solve this question?
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answerhappygod
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Can you solve this question?
Can you solve this question?
Question 1. (25 points) The baseband signal m(t) = 5 sin 3000zt [V] is transmitted with phase modulatie (PM). The peak phase deviation of the transmitted signal is = rad, and the transmitted signal power is 500 W, which is delivered to an antenna with an impedantie of 500. a) Calculate: 1. the phase deviation constant D, [rad/V] of the PM modulator, 2. the carrier amplitude of the signal at the antenna input. b) Discuss in your own words the problem that may arise in the PM-demodulator when >. Now you only have available an FM transmitter with the desired output power and a frequency D₁ deviation constant = 25 kHz/V. 2π c) Derive the baseband input signal for the FM modulator which will result in the desired PM modulated signal at its output. d) Calculate the power that is transmitted in the spectral component of the signal at frequency f. + 3000 Hz. The PM modulated signal is received with a PM detector. The double-sided noise power spectral No = -95 dBm/Hz. density at the detector input is 2 e) Calculate the required received power level to obtain a signal-to-noise ratio after detection equal to SNR = 40 dB, when the bandwidth of the lowpass filter in the receiver is equal to B = 15 kHz.
Question 1. (25 points) The baseband signal m(t) = 5 sin 3000zt [V] is transmitted with phase modulatie (PM). The peak phase deviation of the transmitted signal is = rad, and the transmitted signal power is 500 W, which is delivered to an antenna with an impedantie of 500. a) Calculate: 1. the phase deviation constant D, [rad/V] of the PM modulator, 2. the carrier amplitude of the signal at the antenna input. b) Discuss in your own words the problem that may arise in the PM-demodulator when >. Now you only have available an FM transmitter with the desired output power and a frequency D₁ deviation constant = 25 kHz/V. 2π c) Derive the baseband input signal for the FM modulator which will result in the desired PM modulated signal at its output. d) Calculate the power that is transmitted in the spectral component of the signal at frequency f. + 3000 Hz. The PM modulated signal is received with a PM detector. The double-sided noise power spectral No = -95 dBm/Hz. density at the detector input is 2 e) Calculate the required received power level to obtain a signal-to-noise ratio after detection equal to SNR = 40 dB, when the bandwidth of the lowpass filter in the receiver is equal to B = 15 kHz.
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