SIGNALS AND SYSTEMS

Why the digital signal is more suitable than the analog signal

• accuracy.

• precision

• easy to process

• storage and easy to process

Signals are represented mathematically as functions of one or more independent variables.

• dependent variables

• variables

• constants

• one or more independent variables.

In the case of continuous-time signals the independent variable is

• constant

• continuous

• non continuous

• variable

A speech signal as a function of time and atmospheric pressure as a function of altitude are examples for

• continuous

• discrete

• even digital

• odd digital

The weekly stock market index is an example of a discrete-time signal

• continuous signal

• odd signal

• even signal

• discrete-time signal

x(t)=u(t) is a Unit step sequence

• unit step continuous time signal

• impulse function

• unit impulse function

• unit step discrete time signal

The slope value for the ramp signal is

• t0

• t^2

• Unity

• zero

The amplitude of the given signal is varying with respect to time at every instant

• CT signal

• DT signal

• Both

• CT or DT

If the signal is periodic the amplitude is constant

• the fundamental time period is constant

• the amplitude is not constant

• the fundamental time period is not constant

• the amplitude is constant

The exponential continuous time signal is example for Random signal

• odd signal

• periodic signal

• deterministic signal

• Random signal