(SULIT) C. A slope detector is probably the simplest FM demodulator, however it has several disadvantages...
a. In FM transmission circuits, explain the purpose and function of: i. Pre-emphasis and de-emphasis circuits. (CO1: PO1 - 3 Marks) ii. Limiter circuit. (CO1: P01 - 3 Marks) b. A sinusoidal carrier wave of frequency fe = 110 MHz is modulated by a modulating signal m(t). The characteristics of the modulating signal is illustrated in Figure Q2(b) and the Frequency Deviation Constant of the FM Modulator, kf = 107 Hz/volt. Determine the minimum bandwidth required for transmission of the...
b) The figure below shows an FM demodulator. s'(t)Envelope detector Demodulated signal s(t) Differentiator Figure 4: Question 2(b) In the system above, the differentiator performs the time-differentiation operation s'(t) = as(t). Also, the envelope detector is assumed to be ideal, capable of extracting the envelope of the incoming signal perfectly. Describe, by equations, how the above FM demodulator may exactly recover the message signal from the FM signal. (6%) (c) Is the FM demodulator in Question 2(b) a coherent detector,...
Please do Part 4 and Show all work! 1. 145 points) <FM/FSK Modulation/Demodulations A periodic wave m(t) in Figure 1 below The resulting FM signal is demodulated as shown in the following figure by using frequency discriminator. Assume no attenuation of the signal due to propagation loss (in other words assume amplifiers properly restored the amplitude of the transmitted signal at the receiver) [10 points] Find the Fourier Series (trigonometric Fourier Series) of the message signal m (t) where To...
QUESTION 2 (25 MARKS) In FM transmission circuits, explain the purpose and function of: a. i. Pre-emphasis and de-emphasis circuits. (C01: P01 - 3 Marks) ii. Limiter circuit (C01: P01 - 3 Marks) b. A sinusoidal carrier wave of frequency fe = 110 MHz is modulated by a modulating signal m(t). The characteristics of the modulating signal is illustrated in Figure Q2(b) and the Frequency Deviation Constant of the FM Modulator, ks = 10Hz/volt. Determine the minimum bandwidth required for...
QUESTION 2 (25 MARKS) In FM transmission circuits, explain the purpose and function of: a. i. Pre-emphasis and de-emphasis circuits. (CO1: P01 - 3 Marks) ii. Limiter circuit. (C01: P01 - 3 Marks) b. A sinusoidal carrier wave of frequency ſe = 110 MHz is modulated by a modulating signal m(t). The characteristics of the modulating signal is illustrated in Figure 02(b) and the Frequency Deviation Constant of the FM Modulator, ky = 107 Hz/volt. Determine the minimum bandwidth required...