象)Si gna o Continuous-time signal vS. discrete-time signal Continuous-valued signal VS. discrete-valued signal Continuous-time continuous-valued: analog signal Discrete-time and discrete-valued digital signal Discrete-time and continuous-valued: sampled signal Continuous-time and discrete-valued: quantized signal Communications EngineeringCommunications Engineering 5 Signal Continuous-time signal vs. discrete-time signal Continuous-valued signal vs. discrete-valued signal Continuous-time continuous-valued: analog signal Discrete-time and discrete-valued: digital signal Discrete-time and continuous-valued : sampled signal Continuous-time and discrete-valued: quantized signal