a- many methods are used for extracting the modulating signal from the frequency modulation technique, so, list them and explain briefly the second one , then draw its electrical circuit. b- Explain, how we can overcome the limitations of the amplitude modulation technique, then draw the electrical circuit of both methods.

1a. Draw a circuit diagram using appropriate logic gates to implement a 3-bit comparator. Identifythe gates used in implementation and show its usage to compare two 3-bit words by writing thetruth table. b. Write the Boolean expression for the following 4 input circuit. Include sub-expressions foroutputs of each gate. c. Complete a truth table for the previous logic gate circuit in part b. d. Write the Boolean expression for the new circuit below. Then, simplify the following logic circuitusing the theorems in Boolean algebra. Show the steps clearly and specify the law used in eachstep. Finally draw the simplified circuit diagram.

Question 2: Using sketch, clearly explain the difference between ground wave propagation and sky wave propagation. Sketch of ground-wave Sketch of sky-wave

Unless specified otherwise, use the free space propagation speed of light 3x108 m/s to calculate the propagation delay. For numerical calculations, the results must show the appropriate unit. Show a complete solution for each problem4. A digital audio broadcast service is used to transmit digital music. Stereo audio signals are to be transmitted using a digital modem over a data link. A stereo signal uses two channels. In each channel, an audio signal is sampled at a rate of 44 kilo samples/second and quantised using a 24-bit quantiser. The data link has a transmission bandwidth of 0.5 MHz. Assume a 46-byte overhead is added to each packet before transmission.a. What is the total bit rate produced by a stereo audio signal?b. What is the minimum SNR value (in dB) required for the above data link?c. Assume that the broadcast service uses the UDP/IP/Ethernet protocol to transmit digital audio, using a packet switched network. The maximum packet size is limited to 800 bytes, which includes…

Plot the sine wave at frequency fm and the sampling signal at frequency fs1. Write a MATLAB program to take input both fm and fs1 and plot the curves mentioned above.

MATLAB

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Explain in your own words what is meant by the term "sub-band coding" in the field of acoustics, as well as what part it plays in the compression of MP3 files, and use this information to answer the following question:

Question 2 In Figures 2, 3, 4 and 5 the designation of the state of the MISO signal is "Hi-Z" before an. after the SS signal is low. This means the output driving the signal is turned completely off and not driving the signal either high or low. "Hi-Z" means "High Impedance". Also in the figures, the designation of the state of the MOSI signal is "XXX" before and after the SS signal is low. This means the state of the signal is "Unknown" or "Don't Care". If there are multiple Slaves on the bus, why must a Slave turn off the driver (Hi-Z) on the. MISO signal when their SS signal is high

Design and implement (draw the circuit) the output f(12) of a 7 segments decoder as a function of the binary inputs (W,X,Y,Z). You need the complete the following steps: 1. Find the f(12) outputs values (0 or 1) for each number from 0-11 2. Enter these values into a Karnaugh map. 3. Simplify the map. 4. Draw the circuit using Tina. 7 segments display decoder. 7 segments 4 Binary inputs a 7 Segments Decoder Y e