2025-L03su10

2025-L03su10 - ECE2025 Summer 2010 Lecture 3 Spectrum...

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1 5/21/2010 1 ECE2025 Summer 2010 Lecture 3 Spectrum Representation 24 May 10 5/21/2010 3 ANNOUNCEMENTS ± This week: ± Go to recitations on Monday or Tuesday, depending on what L0X section you are signed up for ± Do Lab #1 on Wed or Thurs ± Special case due to holiday: HW #1 due at start of lecture on Wed, June 2 - but pretend it’s due Monday, May 31 ± Yes, some of you will have HW and lab due on the same day that week, so get the HW done early! ± Remember no late homework accepted! ± No lecture Friday, May 28. ± Enjoy your Memorial Day weekend! 5/21/2010 4 SP First Toolbox ± We don’t want to make you have to buy the DSP Toolbox from Mathworks, so… ± We created the SP First Toolbox, which has MATLAB functions we wrote to duplicate some of the functionality of the DSP Toolbox, plus some other goodies. ± Version on CD-ROM that comes with book is old, will not work in latest MATLAB! ± Download latest version from the “Lab” section of T-Square - it fixes some bugs. 5/21/2010 5 READING ASSIGNMENTS ± This Lecture: ± Chapter 3, Section 3-1 ± Other Reading: ± Appendix A: Complex Numbers ± Next Lecture: Ch 3, Sects 3-2, 3-3, 3-7 & 3-8
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2 5/21/2010 6 © 2003, JH McClel an & RW Schafer Review: PHASOR ADDITION Get the new complex amplitude by complex addition 5/21/2010 7 © 2003, JH McClel an & RW Schafer Review: Phasor Addition 5/21/2010 8 © 2003, JH McClel an & RW Schafer Application: Adding Sinusoids ± ADD THESE 2 SINUSOIDS: ± COMPLEX ADDITION: π 5 . 0 0 3 1 j j e e + ) 5 . 0 77 cos( 3 ) ( ) 77 cos( ) ( 2 1
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2025-L03su10 - ECE2025 Summer 2010 Lecture 3 Spectrum...

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