Q7. For the following modulation schemes, construct a table showing the number of bits encoded, number of output conditions, minimum bandwidth, and baud for an information data rate of 12kbps: QPSK, 8-PSK, 8-QAM, 16-PSK, and 16-QAM.
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- 1- A modulation index of 0.5 would be same as a) 0.5 of Modulation Depth b) 1/2% of Modulation Depth c) 5% of Modulation Depth d) 50% of Modulation Depth1. With the help of Octave program perform the Modulation and Demodulation (AM) of information signal with carrier signal, through subplots with following signals a. Modulating signal b. Modulated signal c. Demodulated signal2. Select the correct statement(s) regarding baseband signal modulation. a. modulation involves the mixing of a baseband signal with a carrier to produce a modulated carrier (passband) signal b. the modulation index gives us information regarding the quality of the modulated carrier signal c. FM and PM modulation techniques are categorized as “angular modulation”, while AM is not considered an “angular modulation technique d. all statements are correct
- What is the main feature in AM modulation , that is used to judge if the modulation is good or not ? Explain with examples .Exxplain the PSK modulation technique and compare the BSK, DE-BSK,QPSK, DE-QPSK.01: (A): What are the functional elements of the communication system, draw the block diagram and explain each sub-block. 01: (B): Calculate the power in one of the side band in SSB-SC modulation when the carrier power is 124W and there is 80% modulation depth in the amplitude modulated signal?
- When an AM signal was displayed in a CRO, Vmax is measured as 7.2 V and Vmin measured as 2.9 V. 1. Draw the carrier and message signal separately 2. Determine the value of Vm and Vc 3. Determine the modulation index. 4. Suppose we can change the value of Vm. What is the maximum value that we could use for Vm without causing overmodulation?Example 1 20M₂ Amplitude of carrier signal is given 10 V, and freq? This carrier is modulated by 16 kHz signal and modulation index is 0.6. Devive the DSB-LC (Full AM) 2 terms And Sketch freq domain single Sided DSB -SC SSB (USB) SSB (LSB) - 3 termsFor a binary unipolar signal, the received signal voltage has a maximum value of 4mV. The rms noise Voltage is 0.5mV, then signal to noise ratio and bit error probability are respectively
- A 450 kHz carrier signal is modulated with a 15 kHz modulating signal. What are its sideband frequencies?4. The information in an analog voltage waveform is to be transmitted over a PCM system with a F 0.2% accuracy (full scale). The analog waveform has a bandwidth of 200 Hz, and an amplitude range of -5 to +5 V. determine the following: - The minimum sampling rate needed. - The number of bits needed in each PCM word. - The minimum bit rate in the PCM signal. - The minimum channel bandwidth for transmission of this PCM signal.Explain the relationship between bits per second and baud for an FSK system. Define the following terms for FSK modulation: frequency deviation, modulation index, and deviation ratio. Explain the relationship between (a) the minimum bandwidth required for an FSK system and the bit rate and (b) the mark and space frequencies.