Next, the basic signals, such as unit-impulse, unit-step, unit-ramp, sinusoids, and exponential, are presented. These signals are essential to approximate practical signals. The sampling of continuous signals, which is the first and major step in digital signal processing, and the aliasing ...
In Section 2.1, we discuss the representation of discrete-time signals as sequences and describe the basic sequences such as the unit impulse, the unit step, and complex exponential, which playa central role in characterizing discrete-time systems and form building blocks for more general sequence...
TimeSignalsAnalyticalmethod:Graphicalmethod:Sequencemethod:k=0RepresentationDiscrete-TimeSignalEnergyandPowerEnergy:Power:OperationofDiscrete-TimeSignalsAddition:Multiplication:Difference:forwarddifference:backwarddifferenceRunningsum:OperationofDiscrete-TimeSignalsTimeshift(m>0)RightshiftLeftshiftTransformationsofthe...
Moreover, any discrete-time signal can be represented as a sum of weighted and shifted unit impulse signals, given by: (2)x[n]=∑k=−∞∞x[k]δ[n−k]. Discrete-time systems A discrete-time system can be defined as a mathematical operator, which maps an input discrete-time sequenc...
Unit impulse response and Convolution sum A LTI system is completely characterized by its unit impulse response h [n ].That is, given h [n ], it is possible to use (2.52) to compute the output y [n ] due to any input x [n ]. 强调:只有LTI 系统才能用单位脉冲响应与输入信号卷积和的...
Next, the basic signals, such as unit-impulse, unit-step, unit-ramp, sinusoids, and exponential, are presented. These signals are essential to approximate practical signals. The sampling of continuous signals, which is the first and major step in digital signal processing, and the aliasing ...
Bounded-input, bounded-output(BIBO) ExampleExample y[n]=nx[n] y[n]=x[n+1] 22.33.22 IImpullse andd StStep RResponses The response of a discrete-time system to a unit sample sequence {δ[n]} is called the unit impulse response or simply, the impulse response, and is denoted by {...
美 英 un.离散时间系统 英汉 网络释义 un. 1. 离散时间系统 例句 更多例句筛选
All the continuous-time sinusoidal signals are periodic signal. The time period (T) of a continuous-time sinusoidal signal is given by, T=2πω=1fT=2πω=1f The graphical representation or waveform of a continuous time sinusoidal signal x(t) is shown in Figure-1. ...
0 0 ) ( ) ( 1 ) ( (I.18) When at least one of the } , , , { 2 1 N a a a L is non-zero, then ) (n y depends on its past samples as well as the input signal ) (n x . The system or filter in this case is known as an infinite impulse response (IIR) system. ...