Please help me these questions of "Principles of Communications"
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Please help me these questions of "Principles of Communications" subject. Thanks in advance! Problem 2: PCM syst...
KS31603 SULIT/CONFIDENTIAL QUESTION 4 (20 marks) (a) A message signal has a peak voltage of 1V...
KS31603 SULIT/CONFIDENTIAL QUESTION 4 (20 marks) (a) A message signal has a peak voltage of 1V and its average power is 125 mW. Design a PCM system (find minimum value of R of the R bit A/D) with uniform quantization to achieve at least a signal to quantization noise ratio of 36 dB. What is the signal to quantization noise ratio obtained in your design? [6 marks] (b) If the signal is sampled at 9kHz in 4(a), what is the...
(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...
2. a. Find Eb/No and Amplitude A required to give Pb 10-5 for the following coherent digital modu...
2. a. Find Eb/No and Amplitude A required to give Pb 10-5 for the following coherent digital modulation schemes if No-10-5 and time is 0.5msec i. On-Off keying (ASK), ii. BPSK, iii. BFSK and v. BPSK with a phase error of 5 deg. Consider an audio signal with spectral components limited to the frequency band 300 to 3300 Hz. Assume that the sampling rate of 8000 samples/s will be used to generate a PCM signal. The ratio of peak signal...
a. Describe TWO (2) advantages and TWO (2) disadvantages of digital transmission. (CO1: PO1 - 4...
a. Describe TWO (2) advantages and TWO (2) disadvantages of digital transmission. (CO1: PO1 - 4 marks) b. Sampling, quantization and coding are the three processes used to represent an analog signal in digital form. Considering an input signal into an 8-bit Pulse Code Modulation (PCM) system is a 20 Vp-p 50-Hz, answer the followings: i. Using appropriate diagram briefly describe TWO (2) basic methods to perform the sampling function. (CO2: PO2 - 2 marks) Determine the number of quantization...
8 8.6-4 For a DSB-SC system with a channel noise PSD of Sn() 10-12 and a baseband signal of bandw...
8 8.6-4 For a DSB-SC system with a channel noise PSD of Sn() 10-12 and a baseband signal of bandwidth 5 kHz, the receiver output SNR is required to be at least 47 dB. The receiver is as shown in Fig. 8.30. (a) What must be the signal power Si received at the receiver input? (b) What is the receiver output noise power No? (c) What is the minimum transmitted power Sr if the channel transfer function is He)10-3 over...
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...
Help!!! A information wave m(t) is transmitted using a 4-bit binary PCM system. A uniform quantizer...
Help!!!
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?...
Answer all parts and show all steps please. 3323 Modern Digital and Analog Communication Question A...
Answer all parts and show all steps please.
3323 Modern Digital and Analog Communication Question A compact disc (CD) records audio signals digitally by using PCM. Assume that the audio signal bandwidth equals 15 kHz (a) If signal is sampled at the Nyquist rate and the samples are uniformly digitized into L 65,536 levels and then binary-coded, determine the number of bits required to encode a sample (b) If the audio signal has average power of 0.1 W and a...
digital communication
Given a 2-bit data transmitter which has the block diagram shown in the figure:a) Write down the equations for the possible output signals then sketch the signal spaceb) Calculate the minimum average probability of error for these signals. (The noise is AWGN with zero mean and two-sided PSD No/2 = 4 W/Hz).c) Find the average energy for this constellation.d) Suggest a coherent receiver for this system
Q2 Fig.2 is a simplified diagram of a WCDMA system downlink signalling 20 construction, in which different channel...
Q2 Fig.2 is a simplified diagram of a WCDMA system downlink signalling 20 construction, in which different channelization code CensF are used to PAPER CODE: EEE326/17-18/S2/ exam Page 2 of 6 separate different physical channels in downlink whilst the scrambling code Sa is used to differentiate the BSs. Each physical channel is assigned to different user with a gain factor Gi. Assume QPSK modulation is employed for digital transmission and the spectrum is 3.84 MHz. One user has a data...
KS31603 SULIT/CONFIDENTIAL QUESTION 4 (20 marks) (a) A message signal has a peak voltage of 1V and its average power is 125 mW. Design a PCM system (find minimum value of R of the R bit A/D) with uniform quantization to achieve at least a signal to quantization noise ratio of 36 dB. What is the signal to quantization noise ratio obtained in your design? [6 marks] (b) If the signal is sampled at 9kHz in 4(a), what is the...
(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...
2. a. Find Eb/No and Amplitude A required to give Pb 10-5 for the following coherent digital modulation schemes if No-10-5 and time is 0.5msec i. On-Off keying (ASK), ii. BPSK, iii. BFSK and v. BPSK with a phase error of 5 deg. Consider an audio signal with spectral components limited to the frequency band 300 to 3300 Hz. Assume that the sampling rate of 8000 samples/s will be used to generate a PCM signal. The ratio of peak signal...
a. Describe TWO (2) advantages and TWO (2) disadvantages of digital transmission. (CO1: PO1 - 4 marks) b. Sampling, quantization and coding are the three processes used to represent an analog signal in digital form. Considering an input signal into an 8-bit Pulse Code Modulation (PCM) system is a 20 Vp-p 50-Hz, answer the followings: i. Using appropriate diagram briefly describe TWO (2) basic methods to perform the sampling function. (CO2: PO2 - 2 marks) Determine the number of quantization...
8 8.6-4 For a DSB-SC system with a channel noise PSD of Sn() 10-12 and a baseband signal of bandwidth 5 kHz, the receiver output SNR is required to be at least 47 dB. The receiver is as shown in Fig. 8.30. (a) What must be the signal power Si received at the receiver input? (b) What is the receiver output noise power No? (c) What is the minimum transmitted power Sr if the channel transfer function is He)10-3 over...
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...
Help!!!
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?...
Answer all parts and show all steps please.
3323 Modern Digital and Analog Communication Question A compact disc (CD) records audio signals digitally by using PCM. Assume that the audio signal bandwidth equals 15 kHz (a) If signal is sampled at the Nyquist rate and the samples are uniformly digitized into L 65,536 levels and then binary-coded, determine the number of bits required to encode a sample (b) If the audio signal has average power of 0.1 W and a...
Q2 Fig.2 is a simplified diagram of a WCDMA system downlink signalling 20 construction, in which different channelization code CensF are used to PAPER CODE: EEE326/17-18/S2/ exam Page 2 of 6 separate different physical channels in downlink whilst the scrambling code Sa is used to differentiate the BSs. Each physical channel is assigned to different user with a gain factor Gi. Assume QPSK modulation is employed for digital transmission and the spectrum is 3.84 MHz. One user has a data...
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