Draw and show the BFSK modulation waveform for the given binary data sequence “1,0,0,1”, and also draw its BFSK constellation diagram.
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Draw and show the BFSK modulation waveform for the given binary data sequence “1,0,0,1”, and also draw its BFSK constellation diagram.
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- Q2. Distinguish coherent Vs non coherent detection in digital modulation technique Q4. Discuss FSK and QAM techniques. Draw the signal constellation diagram of 4FSK and 4QAM(b) Pulse Code Modulation (PCM) transforms analogue signals into binary digits where it has to be translated into electrical pulses before transmitting in the baseband channel. Each bit in the PCM sequence has bit time slot T = 0.5 ms and the PCM bits as follows: 1010 1100 0110 (i) Convert the binary digits into its basic pulse waveform representation and delay modulation waveform. (ii) Explain the differences of the converted PCM waveforms in Q4(b)(i).Exxplain the PSK modulation technique and compare the BSK, DE-BSK,QPSK, DE-QPSK.
- (a) Define sampling and quantization. (b) Pulse Code Modulation (PCM) transforms analogue signals into binary digits where it has to be translated into electrical pulses before transmitting in the baseband channel. Each bit in the PCM sequence has bit time slot T = 0.5 ms and the PCM bits as follows: 1010 1100 0110 (i) Convert the binary digits into its basic pulse waveform representation and delay modulation waveform. (ii) Explain the differences of the converted PCM waveforms in Q4(b)(i).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 DepthSuggest another FSK modulation circuit and explain its operation briefly.
- 6. A 5 MHz carrier is modulated by a 5 kHz sine wave. Sketch the result in both the time and frequency domains for each of the following modulation types. a) DSB (Double Side Band) full carrier AM (Amplitude Modulation) b) DSBSC (Double Side Band-Suppressed Carrier) AM (Amplitude Modulation) c) SSBSC (Single Side Band-Suppressed Carrier) AM (Amplitude Modulation) (USB-Upper Side Band)4. This problem addresses the digitization of a television signal using pulse-code modulation. The signal bandwidth is 4.5 MHz. Specifications of the modulator include the following: Sampling: 15% in excess of the Nyquist rate Quantization: uniform with 1024 levels Encoding: binary Determine (a) the Nyquist rate, and (b) the minimum permissible bit rate.2. 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
- Discuss the main limitations of the FSK modulation circuitThe information in an analog signal voltage waveform is to be transmitted over a PCM system with an accuracy of : 0.1 % of the peak-to-peak analog signal. The analog voltage waveform has a bandwidth of 43 Hz and an amplitude range of - 10 to 10 Vots. Determine the minimum bit rate fin bps) required in the PCM system? O a 688 O 774 O c 387 O d 86 Oe 25801: (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?