Proakis salehi - Study guides, Class notes & Summaries

Exam (elaborations) TEST BANK FOR Digital Communications 5th Edition By Proakis Salehi (Instructor Solution Manual) Solutions Manual for Digital Communications, 5th Edition (Chapter 2) 1 Prepared by Kostas Stamatiou January 11, 2008 1PROPRIETARY MATERIAL. c The McGraw-Hill Companies, Inc. All rights reserved. No part of this Manual may be displayed, reproduced or distributed in any form or by any means, without the prior written permission of the publisher, or used beyond the limite...

Exam (elaborations) TEST BANK FOR Fundamentals Of Communication Systems 2nd Edition By Proakis J.G., Salehi M Solution Manual Fundamentals of Communication Systems John G. Proakis Masoud Salehi Second Edition 2013 Chapter 2 Problem 2.1 1. „2t ‚ 5… ƒ   2  t ‚ 52  . This indicates first we have to plot „2t… and then shift it to left by 52 . A plot is shown below: 6

Exam (elaborations) TEST BANK FOR Digital Communications 5th Edition By Proakis Salehi (Instructor Solution Manual) Solutions Manual for Digital Communications, 5th Edition (Chapter 2) 1 Prepared by Kostas Stamatiou January 11, 2008 1PROPRIETARY MATERIAL. c The McGraw-Hill Companies, Inc. All rights reserved. No part of this Manual may be displayed, reproduced or distributed in any form or by any means, without the prior written permission of the publisher, or used beyond the limite...

a. ˆx(t) = 1  Z ∞ −∞ x(a) t − a da Hence : −ˆx(−t) = −1  R ∞ −∞ x(a) −t−ada = −1  R −∞ ∞ x(−b) −t+b (−db) = −1  R ∞ −∞ x(b) −t+bdb = 1  R ∞ −∞ x(b) t−b db = ˆx(t) where we have made the change of variables : b = −a and used the relationship : x(b) = x(−b). b. In exactly the same way as in part (a) we prove : ˆx(t) = ˆx(−t) c. x(t) = cos !0t, so its Fourier transform is : X(f) = 1 2 ...

1. „2t ‚ 5… ƒ   2  t ‚ 52  . This indicates first we have to plot „2t… and then shift it to left by 52 . A plot is shown below: 6