K mitra likewise the output vn to the input gn is

Info iconThis preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: nitude and gain responses of an M-point moving average filter as shown below • The phase response of a discrete-time system when determined by a computer may exhibit jumps by an amount 2π caused by the way the arctangent function is computed • The phase response can be made a continuous function of ω by unwrapping the phase response across the jumps 1 100 M=5 M=14 50 Phase, degrees Magnitude 0.8 0.6 0.4 0.2 49 0 0 0 -50 -100 M=5 M=14 -150 0.2 0.4 0.6 0.8 1 -200 ω/π 0 0.2 0.4 0.6 0.8 Copyrightω/π 2005, S. K. Mitra © 1 50 Copyright © 2005, S. K. Mitra Frequency Response Computation Using MATLAB Steady-State Response • Note that the frequency response also determines the steady-state response of an LTI discrete-time system to a sinusoidal input • Example - Determine the steady-state output y[n] of a real coefficient LTI discrete-time system with a frequency response H (e jω ) for an input • To this end the function unwrap can be used, provided the computed phase is in radians • The jumps by the amount of 2π should not be confused with the jumps caused by the zeros of the frequency response as indicated in the phase r...
View Full Document

This document was uploaded on 11/09/2013.

Ask a homework question - tutors are online