Chapter 2 Discrete-Time Signals and Systems Review of Chapter 2 2.1 Discrete-Time Signals: Sequences High and low frequencies in Discrete-time signal 42.2 Discrete-Time Systems Memoryless(memory): Linear; Time-Invariant Causality stability (biBo 2. 3 Linear Time-Invariant(LTI) Systems ◆ LTI Systems: Convolution(y=gm系统适用吗?) 2.4 Properties of LTI Systems Stability and Causality of LTI systems FIR and IIR systems 2/6/2021 Zhongguo Liu_ Biomedical Engineering_Shandong UniV
2 2/6/2021 Zhongguo Liu_Biomedical Engineering_Shandong Univ. Chapter 2 Discrete-Time Signals and Systems ◆2.1 Discrete-Time Signals: Sequences ◆High and Low Frequencies in Discrete-time signal ◆2.2 Discrete-Time Systems ◆Memoryless (memory); Linear; Time-Invariant; Causality; Stability(BIBO) ◆2.3 Linear Time-Invariant (LTI) Systems ◆LTI Systems:Convolution( 系统适用吗?) ◆2.4 Properties of LTI Systems ◆Stability and Causality of LTI systems;FIR and IIR systems; Review of Chapter 2 y n g n x n = [ ] [ ]
Chapter 2 Discrete-Time Signals and Systems Review of Chapter 2 2.5 Linear Constant-Coefficient Difference Equations The output for a given input is not uniquely specified. Auxiliary conditions are required; initial-rest conditions 92.6 Frequency-Domain Representation of Disarete- Time Signals and systems Eigenfunction and Eigenvalue for LTI systems 2.7 Representation of Sequences by Fourier Transforms 12. 8 Symmetry Properties of the Fourier Transform 2.9 Fourier Transform Theorems 2.10 Discrete-Time Random Signals 2/6/2021 Zhongguo Liu_ Biomedical Engineering
3 2/6/2021 Zhongguo Liu_Biomedical Engineering_Shandong Univ. Chapter 2 Discrete-Time Signals and Systems ◆2.5 Linear Constant-Coefficient Difference Equations ◆The output for a given input is not uniquely specified. Auxiliary conditions are required; initial-rest conditions ◆2.6 Frequency-Domain Representation of DiscreteTime Signals and systems ◆ Eigenfunction and Eigenvalue for LTI systems ◆2.7 Representation of Sequences by Fourier Transforms ◆2.8 Symmetry Properties of the Fourier Transform ◆2.9 Fourier Transform Theorems ◆2.10 Discrete-Time Random Signals Review of Chapter 2
多选题1分 设置 Select the correct description about system: 小]=8nm I The system is Linear. B The system is Time-Invariant The system is Memoryless. I The system is Causal. E If h[n] is the Impulse response of the system, and the system is given an input xin, then the system have the output y]=*x小 hIn=glos[n M*礼=810*x=0C LIIUIyyuu uu Biomedical Engineering_ shandong Univ
4 2/6/2021 Zhongguo Liu_Biomedical Engineering_Shandong Univ. Select the correct description about system: The system is Linear. The system is Time-Invariant. The system is Memoryless. The system is Causal. A B C D 提交 If is the Impulse response of the system , and the system is given an input , then the system have the output . E y n g n x n = [ ] [ ]. y n h n x n = [ ] [ ]. h n[ ] x n[ ] h n x n g n x n g x n [ ] [ ] [0] [ ] [ ] [0] [ ] = = h n g n [ ] [0] [ ] = 多选题 1分 multiple choice
多选题1分 设置 Select the correct description about the frequency of the signal x[n]=Acos(oon) A O0=oo is the highest frequency BO=2T is the highest frequency. O%=I is the highest frequency D O=I is the lowest frequency I O=2 is the lowest frequency. 0 is the lowest frequenc g o=aI is lower than 0=AT H 丌 is higher than 提交 5 2/6/2021 Zhongguo liu Biomedical Engineering shandong Univ
5 2/6/2021 Zhongguo Liu_Biomedical Engineering_Shandong Univ. Select the correct description about the frequency of the signal . is the highest frequency. is the highest frequency. is the highest frequency. is the lowest frequency. A B C D 提交 0 x n A n [ ] cos( ) = 0 = 0 = 2 0 = E is the lowest frequency. F is the lowest frequency. 0 = 0 = 2 0 = 0 G is lower than . H is higher than . 0 3 4 = 0 7 4 = 0 3 4 = 0 7 4 = 多选题 1分 multiple choice
多选题1分 设置 Select the correct description about a stable LTI system the impulse response is absolutely summable S=∑小] k= B the impulse response is not absolutely summable S=∑k]→O k If the input x[n]≤B.<a,ral Then the output y[n]<B, <o,for alln 提交 6 2/6/2021 Zhongguo liu Biomedical Engineering shandong Univ
k S h k =− = 6 2/6/2021 Zhongguo Liu_Biomedical Engineering_Shandong Univ. Select the correct description about a stable LTI system: the impulse response is absolutely summable the impulse response is not absolutely summable If the input A B C 提交 =− = → k S h k , , x x n B for all n , . y Then the output y n B for all n 多选题 1分 multiple choice