K mitra 83 14 phase and group delays a graphical

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: f the above system 75 2 1 0 76 Copyright © 2005, S. K. Mitra -1 0 20 40 60 Time index n 80 100 Copyright © 2005, S. K. Mitra The Concept of Filtering The Concept of Filtering • From this table, it can be seen that, neglecting the least significant digit, y[n] = cos(0.4( n − 1)) for n ≥ 2 • Computation of the present value of the output requires the knowledge of the present and two previous input samples • Hence, the first two output samples, y[0] and y[1], are the result of assumed zero input sample values at n = −1 and n = −2 • The first seven samples of the output are shown below 77 y[n] x [n] 2 x [n] 3 78 Copyright © 2005, S. K. Mitra Copyright © 2005, S. K. Mitra 13 The Concept of Filtering Phase Delay • Therefore, first two output samples constitute the transient part of the output • Since the impulse response is of length 3, the steady-state is reached at n = N = 2 • Note also that the output is delayed version of the high-frequency component cos(0.4n) o...
View Full Document

This document was uploaded on 11/09/2013.

Ask a homework question - tutors are online