Linear, Time-invariant Systems

• Linear, time-invariant systems form a large and useful class of systems considered by electrical engineers.
• In general, a system accepts an input signal and produces an output signal.
• The system defines the relationship between input and output.
• Linear, time-invariant systems can be used to describe among others
  • communication channels,
  • manufacturing systems,
  • airplanes,
  • economic systems.
• Sinusoids are eigenfunctions of linear, time-invariant systems.
• We will investigate this property further in the next lecture.
• Today, we focus on the properties linearity and time-invariance.