已知x[n]=[1,3,5],h[n]=[2,4],且y[n]=x[n]*h[n],则y[2]=______ 。
举一反三
- 序列x[n] = [1,2,3,4], y[n] = [3,2,1,1], 请问x[n]+y[n]等于多少？
- 已知x[n]=δ[n+1]+2δ[n]-3δ[n-1]，h[n]=2δ[n+1]+δ[n-1]，则y[n]=x[n]*h[n]= 。
- LTI系统中,已知Y[n]=x[n]+2x[n-1]+x[n-2]求1）h[n](x[n]=δ[n]时,δ[n]=0,n不=0,δ[0]=1）
- The 3rd homeworkListen to the following, spell the words in English and translate into Chinese._________________ [ʃeip]• _________________['traiæŋɡl]• ____________[raund]• _______________ ['əuvl]• _______________ [hɑ:t]• _______________ [stɑ:(r)]• _______________ [riŋ]• _______________ [ˈrektæŋɡl]• __________[skweə(r)]• _______________ ['daiəmənd]• _______________ [kju:b]• _______________ [kəʊn]_______________ ['kʌlə(r)]• _______________ [(h)wait] _______________ [blæk]• _______________ ['jeləu] _______________ [ɡri:n]• _______________ [red] _______________ ['silvə(r)]• _______________ ['ɡəuldən] _______________ [piŋk]• _______________ [braun] _______________ [blu:]• _______________ ['pə:pl] _______________ [ɡrei]• _______________ ['aivəri]_______________ [məˈtiəriəl]• _______________ ['leðə(r)] _______________ [klɔθ]• _______________ ['plæstik] _______________ ['rʌbə(r)]• _______________ [ˈmetl] _______________ [wud]_______________ ['tekstʃə(r)]• _______________ [sɔft]• _______________ [hɑ:d]• _______________ ['tendə(r)] _______________ [rʌf]• _______________ [smu:ð] _______________ ['stiki]_______________ [weit ənd ˈvɔlju:m]• _______________ ['sentiˌmi:tə] =(cm)• _______________ ['miliˌmi:tə] =mm• _______________ ['kiləˌmi:tə]=km• _______________ [intʃ] (1 _____ =25.4mm)• _______________ [mail] (1_____=1.609km)• _______________ [ɡræm]=g• _______________ [ˈkiləgræm] =kg.• _______________[paund] (1______=0.4536kg)• _______________ [tʌn]（1______ =1000kg）
- 假设下面3个系统的单位脉冲响应都可用h[n]来表示，当系统的输入信号序列是x[n]时，则系统的输出y[n]可用卷积表示（y[n]=x[n]*h[n]）的系统是（ ） A: y[n]=sin[2n]x[n] B: y[n]=x[n]-x[n-1] C: y[n]=(x[n])² D: y[n]=x[n]+u[n]