What is a Discrete Time Impulse Sequence?The discrete time unit impulse sequence 𝛿[𝑛], also called the unit sample sequence, is defined as, $$\mathrm{\delta \left [ n \right ]=\left\{\begin{matrix} 1\; for\: n=0\ 0\; for \: neq 0\ \end{matrix}\right.}$$Properties of Discrete Time Unit Impulse SequenceScaling PropertyAccording to the scaling property of discrete ... Read More

What is a Power Signal?A signal is said to be a power signal if its average power (P) is finite, i.e., 0 < 𝑃 < ∞. The total energy of a power signal is infinity over infinite time, i.e., 𝐸 = ∞. The periodic signals are the examples of power ... Read More

What is an Energy Signal?A signal is said to be an energy signal if and only if its total energy (E) is finite. That means 0 < 𝐸 < ∞. The average power of an energy signal is zero over infinite time (i.e., P = 0). The non-periodic signals are ... Read More

Real Exponential SignalsAn exponential signal or exponential function is a function that literally represents an exponentially increasing or decreasing series.Continuous-Time Real Exponential SignalA real exponential signal which is defined for every instant of time is called continuous time real exponential signal. A continuous time real exponential signal is defined as ... Read More

Static SystemA system whose response or output is due to present input alone is known as static system. The static system is also called the memoryless system. For a static or memoryless system, the output of the system at any instant of time (t for continuous-time system or n for ... Read More

What is Time Scaling?The process of multiplying a constant to the time axis of a signal is known as time scaling of the signal. The time scaling of signal may be time compression or time expansion depending upon the value of the constant or scaling factor. The time scaling operation ... Read More

The property of a system which makes the behaviour of the system independent of time is known as time invariance. Time invariance means that the behaviour of the system does not depend on the time at which the input is applied to the system.Time-Invariant SystemIf the input and output characteristics ... Read More

A signal is defined as a single-valued function of one or more independent variables which contain some information. Examples of signals are electric current and voltage, human speech, etc.Unit Ramp SignalA ramp function or ramp signal is a type of standard signal which starts at 𝑡 = 0 and increases ... Read More

What is a Signal?A signal is defined as a single-valued function of one or more independent variables which contain some information. Examples of signals are electric current and voltage, human speech, etc.Unit Step SignalThe step signal or step function is that type of standard signal which exists only for positive ... Read More

What is a Signal?A signal can be defined in one of the following ways −Anything that conveys information can be termed as a signal.A signal can also be defined as a single valued function of one or more independent variables which has some information.A signal may also be defined as ... Read More