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| − | + | Today we looked at the CTFT of another pure frequency (cosine). We observed that, once again, the CTFT you saw in ECE301 looks somewhat different, a priori, but can be reconciled using the [[Homework_3_ECE438F09|scaling property of the Dirac delta]]. After that, we obtained the CTFT of a "rect" and a "sinc". We then defined two important operators: the "rep" and the "comb". We showed that the CTFT of a "rep" of a signal is a "comb" of the CTFT of the signal. | |
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'''Action Items''' | '''Action Items''' | ||
| + | * Take a look at the following practice problem. Before looking at the answers on the page, try to solve the problem on your own and write down your solution. (You are welcome to write it directly on the page to get feedback.) Then read the other students solutions and try to find the "best one". If you find a mistake, or have a questiont/comment, post it directly on the page. (Please contact your instructor if you wish to use an anonymous login.) | ||
| + | **[[practice_CTFT_computation_rect_and_sinc_ECE438F11|Compute the Fourier transform of a rect and a sinc]] | ||
*Keep working on [[HW1ECE38F15|HW1]]. It is due Wednesday September 2, 2015 | *Keep working on [[HW1ECE38F15|HW1]]. It is due Wednesday September 2, 2015 | ||
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Latest revision as of 09:38, 28 August 2015
Lecture 3 Blog, ECE438 Fall 2015, Prof. Boutin
Friday August 28, 2015 (Week 1) - See Course Outline.
Jump to Lecture 1, 2, 3 ,4 ,5 ,6 ,7 ,8 ,9 ,10 ,11 ,12 ,13 ,14 ,15 ,16 ,17 ,18 ,19 ,20 ,21 ,22 ,23 ,24 ,25 ,26 ,27 ,28 ,29 ,30 ,31 ,32 ,33 ,34 ,35 ,36 ,37 ,38 ,39 ,40 ,41 ,42 ,43 ,44, 45 .
Today we looked at the CTFT of another pure frequency (cosine). We observed that, once again, the CTFT you saw in ECE301 looks somewhat different, a priori, but can be reconciled using the scaling property of the Dirac delta. After that, we obtained the CTFT of a "rect" and a "sinc". We then defined two important operators: the "rep" and the "comb". We showed that the CTFT of a "rep" of a signal is a "comb" of the CTFT of the signal.
Action Items
- Take a look at the following practice problem. Before looking at the answers on the page, try to solve the problem on your own and write down your solution. (You are welcome to write it directly on the page to get feedback.) Then read the other students solutions and try to find the "best one". If you find a mistake, or have a questiont/comment, post it directly on the page. (Please contact your instructor if you wish to use an anonymous login.)
- Keep working on HW1. It is due Wednesday September 2, 2015
Questions/Comments
- Post question here
Previous: Lecture 2
Next: Lecture 4
