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19. 1 mark) What is the Nyquist sampling rate for a band-pass signal with a bandwidth...
1. (a) A signal band-limited to 10 kt is sampled at Nyquist rate and i-law quantized...
1. (a) A signal band-limited to 10 kt is sampled at Nyquist rate and i-law quantized with ? 127. if this digital signal is to be transmitted with an SNR of at least 30 dB, determine the number of bits in the quantizer output. (b) What is the actual SNR observed at the quantizer output in part (a)7 (e) Determine the transmission bandwidth of the digital signal above.
1. (15) By the Sampling Theorem the Nyquist sampling rate must be twice the highest bandwidth...
1. (15) By the Sampling Theorem the Nyquist sampling rate must be twice the highest bandwidth of the message signal. For the three message signals below determine the Nyquist rate and the Nyquist interval for each. a) m(t) = 0.5 cos(150 ) + sin(300Ft) + 0.75 cos(350ft) b) m(t) = 2 cos(120rt) sin(3007) c) m(t) = sinc(4000) = sin(400m) Recall: the Fourier transform of a sinc waveform is a rectangular pulse
Digital Communication (ELEC 20004)-Spring-19-cW1 (ASSMNT)-All AK 1. a. A waveform m() -62 sin (3500t+)+36 sin(4500t5 is to be uniformly sampled for digital transmission. i. Determine the sampling...
Digital Communication (ELEC 20004)-Spring-19-cW1 (ASSMNT)-All AK 1. a. A waveform m() -62 sin (3500t+)+36 sin(4500t5 is to be uniformly sampled for digital transmission. i. Determine the sampling frequency that satisfies the Nyquist criteria, and hence (7 Marks) determine the period of the signal ii. If we want to reproduce 55 minutes of this wave form, determine the how many (8 Marks) b. The output of a digital computer is at a rate of 64 kbps. If the roll off factors...
Signal Conditioning Circuit
(a) Draw a circuit to show the design of signal conditioning circuit that accepts a common mode input to drive an Analogue to Digital Converter (ADC) with a differential input. It should have pre-settable gains of X1 X5 and anti-aliasing filter allowing response up to 200Hz. (b) Calculate the component values for your signal conditioning circuit drawing for question (a). The overall maximum DC gain from input to the ADC should be 5 and the input resistance should be set to...
[MATLAB Scriptfile task] Design N-band tone vocoder with a given figure (below) in MATLAB implementing the...
[MATLAB Scriptfile task]
Design N-band tone vocoder with a given figure (below) in MATLAB
implementing the given script file(bands_cutoff). This program
should be able to process any sound(.wav) file. Then, graph the
band-passed signals and amplitude envelopes extracted(after
rectification and low-pass filtering) and waveforms of the original
sound and vocoded sound. Additionally, using the output of the
script file, make spectrograms of the original sound and the
synthesized sound.
Bandpass filter Modulation Band-limiting Envelope detection BPF RECT LPF BPF sine...
[MATLAB Scriptfile task] Design N-band tone vocoder with a given figure (below) in MATLAB implementing the...
[MATLAB Scriptfile task]
Design N-band tone vocoder with a given figure (below) in MATLAB
implementing the given script file(bands_cutoff). This program
should be able to process any sound(.wav) file. Then, graph the
band-passed signals and amplitude envelopes extracted(after
rectification and low-pass filtering) and waveforms of the original
sound and vocoded sound. Additionally, using the output of the
script file, make spectrograms of the original sound and the
synthesized sound.
Bandpass filter Modulation Band-limiting Envelope detection BPF RECT LPF BPF sine...
1. A mono audio signal has a bit rate (sampling rate times bits per sample) of...
1. A mono audio signal has a bit rate (sampling rate times bits per sample) of 35 MB/sec. How many seconds of such audio can be stored on a CD of 700 MB? 2. An audio signal is sampled at a rate of 256 samples per second and 8 bits are assigned to each sample. Calculate the file size of 4 seconds of stereo audio. 3. Following is(are) advantages of digital audio as compared to analog audio duplication flexibility environmental...
1. (ch.7) A PCM/TDM system multiplexes 24 voice band channels. Each sample is encoded into 7...
1. (ch.7) A PCM/TDM system multiplexes 24 voice band channels. Each sample is encoded into 7 bits and a frame consists of one sample from each channel. A framing bit is added to each frame. The sampling rate is 9000 samples/sec. What is the line speed in bits per second? 2. (ch.9) An asynchronous protocol uses 1 start bit, 7 data bits, 2 stop bits and 1 even parity bit for each character. a. How many bits are in a...
Problem 1 Given the OFDMA scheme with the following constraints, iA bandwidth of 5 MHz in)...
Problem 1 Given the OFDMA scheme with the following constraints, iA bandwidth of 5 MHz in) The channel spacing is 15 KHz and symbol duration-ios- i) The Cyclic Prefix (CP) for each symbol is 16.67pus long iv) The Time Division Multiplexing (TDM) frame duration is 10 ms Answer the following: How many subcarriers are available? How many symbols can be fit into one TDM frame? a) b) 2. The following table illustrates the operation of an FHSS system for one...
QUESTION 28 3 points Save The Siter coefficients of a second-order digital IR filter are: ao-1,a1-2, a2-2, bo-1. b1-1/2, b2 1/8. (a's are numerator coetficients and b's are the denom...
QUESTION 28 3 points Save The Siter coefficients of a second-order digital IR filter are: ao-1,a1-2, a2-2, bo-1. b1-1/2, b2 1/8. (a's are numerator coetficients and b's are the denominator coefficients). Determine the value of the impulse response N4? QUESTION 29 6 points Save Answer An image is to be sampled with a signal-to-quantisation ratio of at least 55 dB. The image samples are non-negative. The image sample values fall within the range from 0 to 1. How many bits...
1. (a) A signal band-limited to 10 kt is sampled at Nyquist rate and i-law quantized with ? 127. if this digital signal is to be transmitted with an SNR of at least 30 dB, determine the number of bits in the quantizer output. (b) What is the actual SNR observed at the quantizer output in part (a)7 (e) Determine the transmission bandwidth of the digital signal above.
1. (15) By the Sampling Theorem the Nyquist sampling rate must be twice the highest bandwidth of the message signal. For the three message signals below determine the Nyquist rate and the Nyquist interval for each. a) m(t) = 0.5 cos(150 ) + sin(300Ft) + 0.75 cos(350ft) b) m(t) = 2 cos(120rt) sin(3007) c) m(t) = sinc(4000) = sin(400m) Recall: the Fourier transform of a sinc waveform is a rectangular pulse
Digital Communication (ELEC 20004)-Spring-19-cW1 (ASSMNT)-All AK 1. a. A waveform m() -62 sin (3500t+)+36 sin(4500t5 is to be uniformly sampled for digital transmission. i. Determine the sampling frequency that satisfies the Nyquist criteria, and hence (7 Marks) determine the period of the signal ii. If we want to reproduce 55 minutes of this wave form, determine the how many (8 Marks) b. The output of a digital computer is at a rate of 64 kbps. If the roll off factors...
[MATLAB Scriptfile task]
Design N-band tone vocoder with a given figure (below) in MATLAB
implementing the given script file(bands_cutoff). This program
should be able to process any sound(.wav) file. Then, graph the
band-passed signals and amplitude envelopes extracted(after
rectification and low-pass filtering) and waveforms of the original
sound and vocoded sound. Additionally, using the output of the
script file, make spectrograms of the original sound and the
synthesized sound.
Bandpass filter Modulation Band-limiting Envelope detection BPF RECT LPF BPF sine...
[MATLAB Scriptfile task]
Design N-band tone vocoder with a given figure (below) in MATLAB
implementing the given script file(bands_cutoff). This program
should be able to process any sound(.wav) file. Then, graph the
band-passed signals and amplitude envelopes extracted(after
rectification and low-pass filtering) and waveforms of the original
sound and vocoded sound. Additionally, using the output of the
script file, make spectrograms of the original sound and the
synthesized sound.
Bandpass filter Modulation Band-limiting Envelope detection BPF RECT LPF BPF sine...
1. (ch.7) A PCM/TDM system multiplexes 24 voice band channels. Each sample is encoded into 7 bits and a frame consists of one sample from each channel. A framing bit is added to each frame. The sampling rate is 9000 samples/sec. What is the line speed in bits per second? 2. (ch.9) An asynchronous protocol uses 1 start bit, 7 data bits, 2 stop bits and 1 even parity bit for each character. a. How many bits are in a...
Problem 1 Given the OFDMA scheme with the following constraints, iA bandwidth of 5 MHz in) The channel spacing is 15 KHz and symbol duration-ios- i) The Cyclic Prefix (CP) for each symbol is 16.67pus long iv) The Time Division Multiplexing (TDM) frame duration is 10 ms Answer the following: How many subcarriers are available? How many symbols can be fit into one TDM frame? a) b) 2. The following table illustrates the operation of an FHSS system for one...
QUESTION 28 3 points Save The Siter coefficients of a second-order digital IR filter are: ao-1,a1-2, a2-2, bo-1. b1-1/2, b2 1/8. (a's are numerator coetficients and b's are the denominator coefficients). Determine the value of the impulse response N4? QUESTION 29 6 points Save Answer An image is to be sampled with a signal-to-quantisation ratio of at least 55 dB. The image samples are non-negative. The image sample values fall within the range from 0 to 1. How many bits...
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