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Unformatted text preview: ECE-2025 Spring-2009 Lecture 18 Continuous-Time Signals and Systems 23-Mar-09 fo: Lab & HW Info: Lab & HW ยก ab #8 report due starting on 25- ar (Wed Lab #8 report due starting on 25 Mar (Wed) ยก No Lab on Tuesday (cycle is now W-Thr-M-Tu) ยก ab #9 FORMAL report ue 1- April Lab #9 FORMAL report due 1 7 April ยก Demo of speech coding filter bank will also be required ab #10 will be โin abโ ยก Lab #10 will be in-Lab ยก HW #9 is due this week ยก Monday Recs can turn in HW #9 on Wed in Lab ยก uiz #3 will be 17- pril (Friday) 3/22/2009 ECE-2025 Spring-09 jMc 2 Quiz #3 will be 17 April (Friday) PeZ Demo: Zero Placing 3/22/2009 ECE-2025 Spring-09 jMc 3 Lecture EADING ASSIGNMENTS READING ASSIGNMENTS ยก This Lecture: ยก Chapter 9, Sects 9-1 to 9-5 ยก ther Reading: Other Reading: ยก Recitation: Ch. 9, all ยก ext Lecture: Chapter 9 Sects 9- to 9- Next Lecture: Chapter 9, Sects 9 6 to 9 8 3/22/2009 ECE-2025 Spring-05 jMc 4 ECTURE OBJECTIVES LECTURE OBJECTIVES ye bye to D Systems for a while ยก Bye bye to D-T Systems for a while ยก The UNIT IMPULSE signal ยก Definition ยก Properties ยก Continuous-time signals and systems ยก Example systems ยก Review: L inearity and T ime- I nvariance ยก Convolution integral: impulse response 3/22/2009 ECE-2025 Spring-05 jMc 5 Filtering of C Signals D-T Filtering of C-T Signals C-to-D D-to-C LTI System H(z) x ( t ) y ( t ) ห ฯ =ฯ T or ฯ = ห ฯ f TI ANALOG s s LTI ANALOG System x ( t ) y ( t ) 3/22/2009 ECE-2025 Spring-05 jMc 6 NALOG SIGNALS x(t) ANALOG SIGNALS x(t) ยก FINITE LENGTH INFINITE LENGTH ยก SINUSOIDS: (t = time in secs)...
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