For a 16-QAM modulator with input bit rate fb = 10 Mbps and carrier frequency fc = 60 MHz, calculate the minimum bilateral Nyquist rate and baud rate. Trace a schematic of the output
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12-21. For a 16-QAM modulator with input bit rate fb = 10 Mbps and carrier frequency fc = 60 MHz, calculate the minimum bilateral Nyquist rate and baud rate. Trace
a schematic of the output spectrum
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- The 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 258b) Determine the input waveforms and that pridaced the output waveforms in Figure bellow. NAND X-NOR 24. 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.
- In digital modulation, the rate of change at the output of a modulator is called a. Modulating frequency b. Bit rate c. Carrier frequency d. Baud rate3/ An analog signal is converted to a binary PCM signal and transmitted over a band-limited channel at 100 kHz. band-limited channel at 100 kHz. Thirty-two quantization levels are used. a/ Calculate the maximum bit rate that can be transmitted. b/ Calculate what is the maximum bandwidth that the analog signal can have.The inputs to an 8-QAM modulator is C=1, I=0, Q=1 with a reference carrier of coswct. The output is a. 1.307 sinwct + 1.307 coswct b. -1.307sinwct - 1.307 coswct c. -1.307sinwct - 0.541coswct d. -0.821sinwct - 0.22coswct
- b) A modulated signal of x(t) = 6cos(300nt)cos(4800nt) + 30 is converted to a digital signal using delta modulation, the step size must be 10mv. Determine: 1- The minimum clock rate that allow the DM system to follow the input analog signal. 2- The quantization noise power if the system resistance of 30 ohm.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.Q15. An 8-bit ADC set all the output pins high with input voltage of 13.75V driven by 2.25MHZ of clock frequency. Then, the output for input 7.83V is calculated as, a. 1001 0000, b. 1001 1001, c. 1001 0001, d. 1000 00012
- What are the benefits of SSBSC modulation compared to DSBFC-AM and DSBSC-AM?Exxplain the PSK modulation technique and compare the BSK, DE-BSK,QPSK, DE-QPSK.10-10. A 12-bit linear PCM code is digitally compressed into eight bits. The resolution = 0.03 V. Determine the following for an analog input voltage of 1.465 V: a. 12-bit linear PCM code b. eight-bit compressed code c. decoded 12-bit code d. decoded voltage e. compressed error f. total error g. percentage error