82.1 Discrete-Time Signals Time-Domain Representation Signals represented as sequences of numbers, called samples Sample value of a typical signal or sequence denoted as x n with n being an integer in the range-0≤n≤o xn defined only for integer values of n and undefined for noninteger values of n Discrete-time signal represented by xn§2.1 Discrete-Time Signals: Time-Domain Representation • Signals represented as sequences of numbers, called samples • Sample value of a typical signal or sequence denoted as x[n] with n being an integer in the range - n  • x[n] defined only for integer values of n and undefined for noninteger values of n • Discrete-time signal represented by {x[n]}