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ECTE301 digital signal Processing midterm examination Test cc9 Paper B fight: 1 hour 30 minutes. Total Marks: 40 marks. Special Instructions: Answers to questions should be expressed clearly and publish legibly. These aspects of presentation will be taken into account in the assessment. Do not arrest the examination until you are told to do so. Answer all questions development the attached sheets. Name: apprentice ID: Question 1 (20 marks) In the following questions, there is scarcely one correct dissolvent. A correct come is expense 2 marks; an absurd answer or no answer is worth nonentity mark. Choosing more than one answer is considered incorrect. Answer all questions on the ANSWER SHEET provided on Page 8. 1.1 The energy of the tokening x(n) = (1 / 2) n u (n) is (a) 0.5 (b) 1.334 (c) 2 (d) 3 1.2 What is the bending frequency when the bode x a (t ) = 20 cos(80? t + 90 o ) is sampled at a tell of 250 samples/ s? (a) 40 Hz 1.3 (b) 80 Hz (c) 125 Hz (d) 160 Hz Suppose that an latitude signal x a (t ) is bandlimited to great hundred00 Hz (i.e. the utmost frequency of the signal is 12000 Hz). What is the Nyquist tempo for this signal? (a) 24 kc per second (b) 12 kHz (c) 8 kHz (d) 6 kHz 1.4 The signal x a (t ) = 2 + 6 sin(120? t + 30 o ) is samples at a rate of 200 Hz.

What is the frequency f of the resulting discrete-time signal (in cycles/sample)? (a) 1/120 (b) 0.6 (c) 0.3 (d) 60 1.5 The signal x a (t ) = 1 + 4 cos(60? t + 30 o ) is samples at a rate of cytosine Hz and quantized using 8 bits. What is the signal-to-quantization noise proportion? (a) one hundred dB (b) 96 dB (c) 60 dB (d) 48 dB 1.6 A signal x(n) = (1 / 3) n u (n) is convolved with the h(n) = 3? (n) ? ? (n ? 2) to succumb a signal y (n) . What is the value of y (n) at n = 3 ? (a) -0.222 (b) 0 (c) 0.00097 (d) 0.00195 Paper B 1 ECTE301 Digital Signal Processing 1.7 Suppose a signal y (n) = x(n) ? h(n) . What is the length of y (n) if x(n) = 2? (n) ? ? (n ? 3) and h(n) = {1, 0.5, ? 0.25, 0.1} ? (a) 4 1.8...If you want to startle a full essay, order it on our website: Ordercustompaper.com

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