hw2 - ECE320 Homework 2 Cornell University Spring 2006...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE320 Homework 2 Spring 2006 Cornell University T.L.Fine Please hand in this assignment at the end of lecture on Tuesday, 14 February. Use only your assigned three-digit code and not your name. 1. Consider the PAM signal s for a Gaussian pulse shape p ( t ) = e - αt 2 , s ( t ) = k = -∞ A k p ( t - kT ) . The role of the parameter α > 0 is that as it increases it makes the pulse narrower and effectively confined to a shorter time interval. By decreasing α we can simulate the effects of dispersion (broadening of the pulses) and of increasing the pulse repetition rate 1 /T (pulses closer together). Let the only n non-zero values A 0 , . . . , A n - 1 of { A k } be given by the Matlab command randn(1,n) for n = 10. (a) Use Matlab to plot (use subplot ) the three PAM signals s , corresponding to the same randomly chosen values of the information-bearing amplitudes { A k } , but for the three different α values of 0 . 3 , 1 . 0 , 3 . 0. (b) Estimate the true amplitudes { A k } (demodulate s ) by the simple act of time-sampling s at the times k ∈ { 0 , 1 , . . . , 10 } to obtain estimates ˆ A k = s ( k ).
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern