
(CO 5) What is needed to eliminate aliasing that can occur during the analog-to-digital conversion? The...
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QUESTION 1 Analyzer's task is to 0 A. Perform required computation with digital signals. O8. Convert analog time-domain signals into digital frequency domain information. Use digital Fourier transform to perform computation. DConvert digital frequency domain information into analog time-domain signals. QUESTION 2 When performing digital signal analysis O A- Sampling frequency needs to be at least 4 times the slowest frequency of the signal. Aliasing can occur whe n the sampling rate is too...
2.12. Aliasing will not occur if the sampling rate is greater than twice the signal band- width. However, perfectly bandlimited signals do not occur in nature. Hence, there is always some aliasing present. (a) Suppose that a filtered signal has a spectrum described by a Butterworth filter with order n 6, and upper cutoff frequency f 1000 Hz. What sampling rate is required so that aliasing is reduced to the -50 dB point in the power spectrum? (b) Repeat for...
12. The analog telephone line has maximum frequency 4 KHz. Analog telephone signal converted to digital. Which sampling frequency (sampling rate ) Analog - to- Digital (AD) converter must have ? At least KHz 13. Which of the following computer architecture is "IBM-compatible PC“? a) x86-64 b) Apple c) ARMv7 d) ARMv8 14. Ir Computer manual describes CPU as: "Intel Core i7, 3.4 GHz". then 3.4 GHz is a) CPU Clock frequency b) Memory bus frequency e) Frequency of the...
3. With the aid of a diagram, briefly explain th ing principle of a Successive a) Approximation Analog-to-Digital Converter (ADC) b) An ADC has to be designed to convert voltages in the range from -5 V to +5 V, with a resolution below (better than) 1 mV. What is the minimum number of bits required to meet this design specification? An ADC has to be designed to convert input voltage signals with frequency c) components less than or equal o...
Q1) Digital-to-Analog Conversion The signal shown in the figure below is inserted to a 5-bit ADC converter Considering, the useful range of the converter is 0-3V, draw the values obtained in the ADC output register when the sampling time is a) 1ms, and b) 0.5ms 3 1.5 16 [ms] 8 0 12 a) 4t ms Reg. value 16 ms] 12 4 0 b) 4t 0.5ms Reg. value 16 t [ms] 12 4 8
Q1) Digital-to-Analog Conversion The signal shown in...
2) If I need to sample an analog signal into a digital representation of it, what resolution and sampling rate would I need given the following: a) The maximum frequency I'm interested in is 38kHz. b) The analog signal is bounded between -5V and 5V. c) I need no more than 500uV of digitization error. 3) Write a ladder logic program for our PLC that will sense when one button (button A) is pressed and will start a fan. The...
Problem 1 (10 points). The time history data in many mechanical engineering measurements are of recorded using a digital data acquisition system so they can be transmitted, stored, and anal easily. The signal is sampled discretely over a duration of Tr (seconds) with a constant time interval of & (seconds) between adjacent discrete data samples. So the signal in the frequency domain is also discretized with the maximum and minimum resolvable sampling frequencies fmax and Jmin being given as 1/(28)...
Module 2 - Quiz 2 TRUE OR FALSE T F 1. Only digital signals can be used to convey information in the communications environment, T F 2. The greater the bandwidth of the signal the greater its information carrying capacity T F 3. The transmission media that are used to convey information can be classified as guided or unguided. T F 4. Twisted pair may only be used to transmit analog and digital signals. T F S. Both analog and...
Communication System
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QUESTION 3 Briefly explain the following Analog Pulse Modulation (APM): (i) Pulse Amplitude Modulation (PAM) Pulse Width Modulation (PWM) (iii) Pulse Position Modulation (PPM) (2 marks) (2 marks) (2 marks) b) There are several digital modulations techniques used to modulate digital signal. For a binary data 10111011, sketch the output waveform if the following modulator is used: Amplitude Shift Keying (ASK) (2 marks) Frequency Shift Keying(FSK) (2 marks) (iii) Phase Shift Keying (PSK)...
4. The continuous-time signal e(t) has the Fourier transform X(jw) shown below. Xe(ju) is zero outside the region shown in the figure X.Gj) -2T (300) -2r(100) 0 2n(100) 2T (300) We need to filter re(t) to remove all frequencies higher than 200 Hz. (a) Plot the effective continuous-time filter we need to implement. Label your plot. b) Suppose we decide to implement the filtering in discrete-time using the overall process (sample, filter, reconstruct) shown in the figure in Problem 3....