The signal ¤[n] is real-valued and its spectrum is nonzero only over the [-1/8, 7/8] interval. Due to the bandwidth constraint we need to "fit" the signal over the bands indicated in green in the following figure Frequency Frequency support of s[n] support of x[n] Frequency support of s[n] + -3m/4 -1/2 -1/8 0 1/8 1/2 Зя/4 To this aim, we need to design a processing block H in order to convert a[n] into a sequence s[n] satisfying the following requirements: • The support of the DTFT of s[n] must be limited to [-37/4, – 7/2] U [7/2, 37/4] • The sequence s[n] must be real-valued (x[n] is real-valued) Which of the following input/output relationships for H meet both requirements? (check all correct answers) : O s[n] = IDTFT{X(ej(w-5#/8))} s[n] = ej*n. æ[n] s[n] = sin(2n) · a(n] %3D O s[n] = cos(n) · æ[n]

The signal ¤[n] is real-valued and its spectrum is nonzero only over the [-1/8, 7/8] interval. Due to the bandwidth constraint we need to "fit" the signal over the bands indicated in green in the following figure Frequency Frequency support of s[n] support of x[n] Frequency support of s[n] + -3m/4 -1/2 -1/8 0 1/8 1/2 Зя/4 To this aim, we need to design a processing block H in order to convert a[n] into a sequence s[n] satisfying the following requirements: • The support of the DTFT of s[n] must be limited to [-37/4, – 7/2] U [7/2, 37/4] • The sequence s[n] must be real-valued (x[n] is real-valued) Which of the following input/output relationships for H meet both requirements? (check all correct answers) : O s[n] = IDTFT{X(ej(w-5#/8))} s[n] = ej*n. æ[n] s[n] = sin(2n) · a(n] %3D O s[n] = cos(n) · æ[n]

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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