Classification of Signals and Systems

This set of flashcards covers major concepts related to the classification of signals and systems as discussed in the lecture.

Continuous-time signal

A signal defined for every real value of the variable t.

Discrete-time signal

A signal defined only for certain values of the variable t, typically whole numbers.

Analog signals

Signals that are continuous in both time and value.

Digital signals

Signals that are discrete in both time and value.

Deterministic signal

A signal whose values are known or can be determined at each time instant.

Stochastic signal

A signal that changes randomly at each time instant and is not reproducible.

Entering signal

A signal whose values are identically zero in the negative time domain.

Non-entering signal

A signal that is not zero in the negative time domain.

Even signal

A signal that satisfies the condition x(−t) = x(t) for all time instant.

Odd signal

A signal that satisfies the condition x(−t) = −x(t) for all time instant.

Bounded signal

A signal that has a finite upper and lower limit throughout.

Finite-time signal

A signal that is zero outside a specified interval.

SISO

Single Input Single Output system.

MIMO

Multiple Input Multiple Output system.

SIMO

Single Input Multiple Output system.

MISO

Multiple Input Single Output system.

Linearity

The property of a system where the output is a linear function of the input.

Invariance

The property of a system where a temporal shift of the input causes the same temporal shift in the output.

Causality

A characteristic of a system where the output depends only on present and past inputs.

Stability

A property of a system where any bounded input results in a bounded output.