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Problem 3: A PCM system uses a uniform quantizer followed by a 6-bit encoder. The bit...
Help!!! A information wave m(t) is transmitted using a 4-bit binary PCM system. A uniform quantizer...
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A information wave m(t) is transmitted using a 4-bit binary PCM system. A uniform quantizer is used to convert the sampled signal into a PCM bit stream. Assume a sampling rate of 2 times the Nyquist rate m(t) .5 0.5 2.5 Time (s) Figure 1: Intelligence signal m(). Determine 1. Determine the quantized sample value and its respective PCM sequence for the following samples: 2Ts, 3Ts and 4Ts 2. What bandwidth would be required to transmit this PCM signal?...
Please help me these questions of "Principles of Communications" subject. Thanks in advance! Problem 2: PCM syst...
Please help me these questions of "Principles of Communications"
subject. Thanks in advance!
Problem 2: PCM system (40 points)coo h Consider a polar binary PCM system with number of bits per sample v 8 and the 4 KHz. Assumed that the channel is AWGN. voice bandwidth a) Assumed that one voice signal is transmitted using above PCM system, find the bit rate at the output of PCM transmitter and the minimum channel bandwidth. b) Assumed that 24 voice signals are...
5.2-1 A compact dise (CD) records audio signals digitlly by using PCM. Let the au bandwidth...
5.2-1 A compact dise (CD) records audio signals digitlly by using PCM. Let the au bandwidth be 15 kHz. (a) If the Nyquist samples are uniformly quantized into L 65,5 (b) If the audio signal has average power of 0.1 W and peak voltage of 1 V, find the resulting (c) Determine the number of binary digits per second (bit/s) required to encode the audico (d) For practical reasons discussed in the text, signals are sampled at a rate well...
(5) A PCM system encodes samples using an 8-bit ADC. In the case of peak signal...
(5) A PCM system encodes samples using an 8-bit ADC. In the case of peak signal amplitude, estimate the signal to quantization noise ratio in dB (6) The output SQNR of a 10-bit PCM was found to be insufficient at 30 dB. To achieve the desired SQNR of 42 dB, an increase to the number of quantization levels was needed. Determine the fractional increase in the transmission bandwidth required. (7) A signal x(t) band-limited to 3kHz is sampled at a...
Solve q2 1.) The binary sequence 11100101 is applied to an ASK modulator. The bit duration...
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q2
1.) The binary sequence 11100101 is applied to an ASK modulator. The bit duration is 1us, and the sinusoidal carrier wave is used to represent symbol 1 has a frequency equal to 7 MHz. a. Find the transmission bandwidth of the transmitted signal. b. Plot the waveform of the transmitted ASK signal. Assume that the line encoder and the carrier-wave oscillator are controlled by a common clock 2.) Repeat Problem (I) for the case when the binary sequence...
3.(30 points) Pulse Code Modulation A-to-D Ideal Lowf Pass Filter xit)- #x) cos(2rfet) (10 points...
3.(30 points) Pulse Code Modulation A-to-D Ideal Lowf Pass Filter xit)- #x) cos(2rfet) (10 points) Consider the system in the above figure. The ideal low pass filter is one which has a brick-wall frequency response (or an ideal sinc function for its impulse response). If the bandwidth of the ideal low pass filter is IkHz and B 2kHz is the bandwidth of a bandpass signal x(t) that is centered at fo 19700Hz, determine the minimum sampling rate fs to avoid...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
5. Basic Problem. We need to determine the transmitter power for a broadcasting system given the...
5. Basic Problem. We need to determine the transmitter power for a broadcasting system given the following information: . The message has 8 kHz bandwidth and normalized power of 0.5. . The systems uses a channel with 60 kHz bandwidth and attenuation of 40 dB. The power spectral density N10-12 W/Hz. pre-emphasis/de-emphasis is used. ยป A frequency modulation scheme is to be used. For simplicity, assume no (a) Determine the minimum transmitter power that will achieve a 40 dB SNR...
Exercise 6: Consider an audio signal with an amplitude that ranges over the interval [-10,10] and...
Communication systems theory:
Exercise 6: Consider an audio signal with an amplitude that ranges over the interval [-10,10] and with spectral components limited to the frequency band of 300 Hz to 3300 Hz. The signal is sampled at a rate of 8000 samples/second and used to generate a PCM signal. The signal-to-quantization- noise ratio (SQNR) is required to be maintained at 43.9 dB a) What is the minimum number of uniform quantization levels needed, and what is the minimum number...
(14%) 6. Consider an FM modulator with output )-100 cos(2(1000)r+(0) The modulator operates with fa = 8 and has the input message signal The modulator is followed by a bandpass filter with a...
(14%) 6. Consider an FM modulator with output )-100 cos(2(1000)r+(0) The modulator operates with fa = 8 and has the input message signal The modulator is followed by a bandpass filter with a a bandwidth of 56HZ, as shown in the following figure. Determine the power ratio and the power at the fiter oput center frequency of 1000HZ and Bandpass filter PM Output Center 1000 Hz Bandwidth 56 Hz mt-5 cos 2(8)r modulator -1000 Hz (a) FM system 39.1 39.1365...
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A information wave m(t) is transmitted using a 4-bit binary PCM system. A uniform quantizer is used to convert the sampled signal into a PCM bit stream. Assume a sampling rate of 2 times the Nyquist rate m(t) .5 0.5 2.5 Time (s) Figure 1: Intelligence signal m(). Determine 1. Determine the quantized sample value and its respective PCM sequence for the following samples: 2Ts, 3Ts and 4Ts 2. What bandwidth would be required to transmit this PCM signal?...
Please help me these questions of "Principles of Communications"
subject. Thanks in advance!
Problem 2: PCM system (40 points)coo h Consider a polar binary PCM system with number of bits per sample v 8 and the 4 KHz. Assumed that the channel is AWGN. voice bandwidth a) Assumed that one voice signal is transmitted using above PCM system, find the bit rate at the output of PCM transmitter and the minimum channel bandwidth. b) Assumed that 24 voice signals are...
5.2-1 A compact dise (CD) records audio signals digitlly by using PCM. Let the au bandwidth be 15 kHz. (a) If the Nyquist samples are uniformly quantized into L 65,5 (b) If the audio signal has average power of 0.1 W and peak voltage of 1 V, find the resulting (c) Determine the number of binary digits per second (bit/s) required to encode the audico (d) For practical reasons discussed in the text, signals are sampled at a rate well...
(5) A PCM system encodes samples using an 8-bit ADC. In the case of peak signal amplitude, estimate the signal to quantization noise ratio in dB (6) The output SQNR of a 10-bit PCM was found to be insufficient at 30 dB. To achieve the desired SQNR of 42 dB, an increase to the number of quantization levels was needed. Determine the fractional increase in the transmission bandwidth required. (7) A signal x(t) band-limited to 3kHz is sampled at a...
Solve
q2
1.) The binary sequence 11100101 is applied to an ASK modulator. The bit duration is 1us, and the sinusoidal carrier wave is used to represent symbol 1 has a frequency equal to 7 MHz. a. Find the transmission bandwidth of the transmitted signal. b. Plot the waveform of the transmitted ASK signal. Assume that the line encoder and the carrier-wave oscillator are controlled by a common clock 2.) Repeat Problem (I) for the case when the binary sequence...
3.(30 points) Pulse Code Modulation A-to-D Ideal Lowf Pass Filter xit)- #x) cos(2rfet) (10 points) Consider the system in the above figure. The ideal low pass filter is one which has a brick-wall frequency response (or an ideal sinc function for its impulse response). If the bandwidth of the ideal low pass filter is IkHz and B 2kHz is the bandwidth of a bandpass signal x(t) that is centered at fo 19700Hz, determine the minimum sampling rate fs to avoid...
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
5. Basic Problem. We need to determine the transmitter power for a broadcasting system given the following information: . The message has 8 kHz bandwidth and normalized power of 0.5. . The systems uses a channel with 60 kHz bandwidth and attenuation of 40 dB. The power spectral density N10-12 W/Hz. pre-emphasis/de-emphasis is used. ยป A frequency modulation scheme is to be used. For simplicity, assume no (a) Determine the minimum transmitter power that will achieve a 40 dB SNR...
Communication systems theory:
Exercise 6: Consider an audio signal with an amplitude that ranges over the interval [-10,10] and with spectral components limited to the frequency band of 300 Hz to 3300 Hz. The signal is sampled at a rate of 8000 samples/second and used to generate a PCM signal. The signal-to-quantization- noise ratio (SQNR) is required to be maintained at 43.9 dB a) What is the minimum number of uniform quantization levels needed, and what is the minimum number...
(14%) 6. Consider an FM modulator with output )-100 cos(2(1000)r+(0) The modulator operates with fa = 8 and has the input message signal The modulator is followed by a bandpass filter with a a bandwidth of 56HZ, as shown in the following figure. Determine the power ratio and the power at the fiter oput center frequency of 1000HZ and Bandpass filter PM Output Center 1000 Hz Bandwidth 56 Hz mt-5 cos 2(8)r modulator -1000 Hz (a) FM system 39.1 39.1365...
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