HW4_FA08 - UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN...

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

View Full Document Right Arrow Icon
Department of Electrical and Computer Engineering ECE 410 Digital Signal Processing Homework 4 Wednesday, September 17, 2008 Prof. Bresler, Prof. Jones Due by September 24, 2008 Problem 1 (10 points) Complete the following signal flow diagram for 8-point, radix-2 decimation-in-time FFT algorithm, and use it to compute the DFT of the 8-pt sequence x [ n ] = {- 1 , - 4 , - 2 , - 3 , 1 , 4 , 2 , 3 } by hand . Specify the value of the input sequence, output sequence, and the signal values after each stage, i.e. , at all the points marked by the solid circles in the diagram. Problem 2 (10 points) The sequence x [ n ] = cos ± π 8 n ² , -∞ < n < was obtained by sampling a continuous-time signal x c ( t ) = cos(Ω 0 t ) , -∞ < t < at a sampling rate of 1024 samples/sec. What are three possible values of Ω 0 that can result in the same sequence of x [ n ]? Problem 3
Background image of page 1

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

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

Page1 / 3

HW4_FA08 - UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online