signal analysis ioe notes and signal analysis old question solution

 

Here you can find ioe signal analysis subject notes | signal processing lecture notes | digital signal analysis and processing notes also ioe old questions solutions are included here with regular update.

Signal Analysis ioe Notes 

what is signal.?

👉 physically, signal is a variation of physical quantity(temperature, pressure, distance, volume, velocity, etc.) that conveys some information about a physical phenomenon. 

👉 mathematically, signal is a function of one or more independent variables that carries information about a physical phenomenon. 

For example: y = f(x)=2sin(x)   [example of one dimensional signal ]

• one dimensional signal : those signal which depends upon only one independent variable.

For example: y = f(x,y)=5x+6y   [example of multidimensional signal ]

• multidimensional signal : those signal which depends upon two or more independent variables.

Note: Independent variable is considered as time.

Types of signal

Continuous time signal

• value of signal exists for all instant of time.
• all naturally occurring signals (analog signals) are continuous time signals.
• representation: x(t) 
• for example: x(t) = 5cos(ㅠt)

Discrete time signals

• value of signal is defined only for certain instant of time.
• discrete time signal are obtained by sampling of continuous time signal.
• representation: x[n]
• range of n = integer between (-∞ to +∞)
• for example: y[n] = 2sin(3n)