信号与系统11-121试卷及参考解答卷

1、学院 姓名 学号 任课老师 考场教室_选课号/座位号 密封线以内答题无效第5页 共5页电子科技大学2011 -2012 学年第 1 学期期 末 考试 A 卷课程名称：_ 信号与系统B大纲 考试形式： 一页纸开卷 考试日期： 20 12年 1月 6 日 考试时长：_120_分钟课程成绩构成：平时 10 %， 期中 20 %， 实验 10 %， 期末 60 %本试卷试题由_1_部分构成，共_5_页。题号一二三四五六七八九十合计得分Attention: You must answer the following questions in English.1. (15 points) Consider

2、 an LTI system with unit impulse response , if the input is , determine the output .Figure 12.（15 points）The Fourier transform of the signal is shown in Figure 1. Determine the function of time .Figure 1Figure 23.（15 points）Consider the system illustrated in Figure 2, if we know and . Suppose the in

3、put ，sketch the spectrum of ,and .Figure 2Figure 34.( 15 points ) Let denote the Fourier transform of the signal depicted in Figure 3.Figure 3(a) Find (b) Find (c) Find 5.(20 points) Consider a causal system for which the input and output arerelated by the differential equation(a) Determine the syst

4、em function of the system and sketch the pole-zero pattern, then indicate the ROC of .(b) Determine the unit impulse response of this system, is this system stable ?(c) If the input is , determine the output .6. (20 points) Consider an LTI system with input and output .(a) Find the system function . (b) Determine the unit impulse response , is this system causal and stab