82.1 Discrete-Time Signals Time-Domain Representation Discrete-time signal may also be written as a sequence of numbers inside braces: {x[n}={…,-0.2,2.2,1.1,0.2,3.7,2.9,…} 个 The arrow is placed under the sample at time index=o In the above, x 1=-0. 2, X0=2. 2, x[1]l=1.1,etc§2.1 Discrete-Time Signals: Time-Domain Representation • Discrete-time signal may also be written as a sequence of numbers inside braces: {x[n]}={…,-0.2,2.2,1.1,0.2,-3.7,2.9,…}  • The arrow is placed under the sample at time index n = 0 • In the above, x[-1]= -0.2, x[0]=2.2, x[1]=1.1, etc