Chapter 13
Introduction to Signals and Systems
אותות ומערכת
Signals are sets of data or information.
One-dimensional signals include single-variable functions, such as the variations in air pressure over time in ...
סיווג אותות
Signals are categorized as Continuous-time or discrete-time, Periodic or aperiodic, Analog or digital, and Causal or noncausal.
A continuous-time signal ...
אותות אנרגיה והספק
Consider an electric system with a resistor. Here, the voltage and current signals enable power and energy measurement across the resistor.
For a ...
אותות זוגיים ואי-זוגיים
An even signal, either in continuous-time or discrete-time, is defined as a signal that matches its own time-reversed version.
Even signals are ...
אותות זמן רציפים בסיסיים
Basic continuous-time signals include the unit step function, unit impulse function, and unit ramp function. These are collectively referred to as ...
פונקציית פולס מלבני ומשולש
The unit rectangular pulse function is mathematically represented by the rectangular function centered at the origin with a height of one unit.
Two ...
אותות מעריכיים וסינוסואידים
The exponential function serves as an essential tool for characterizing waveforms that rise and decay rapidly. This function is defined using the ...
אותות זמן בדידים בסיסיים
The unit step sequence is expressed as 1 for zero and positive values of integer 'n'. This can be graphically displayed using a set of eight ...
פעולות בסיסיות על אותות
Basic signal operations are time reversal, scaling, shifting, and amplitude transformations.
Time reversal mirrors a continuous-time signal about the ...
סיווג מערכות-I
Linearity is a system property with a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input is ...
סיווג מערכות-II
Continuous-time systems have continuous input and output signals, with time measured continuously, and are generally defined by differential or algebraic ...
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