Here we will discuss- what is a signal, definitions of signal, interesting examples of signals in our daily life and different types of signals.
Do you know, whether you are walking, singing, speaking or dancing... You are producing signals !!! Our whole universe is mathematical...
1. Any physical quantity that varies with time and space is a Signal.
2. A Signal may be defined as a function of one or more independent variables like time, distance, position or temperature etc. that has some information about the phenomena (event) that produced it.
A signal can be a Motion signal, Sound signal, Image signal or Video signal etc. Now let's discuss each type of the signals-
To make it clear let's take an example-
The mathematical equation given below tells the position of a particle at any time instant-
x = 3t + 5
Here 'x' is the position and 't' is time
With the help of this equation you can easily find out the position of this particle at any time instant.
e.g. x = 5 at t = 0
x = 11 at t = 2
and so on...
One important example of the motion signal is RADAR which displays the motion of any aircraft as an electromagnetic signal.
Sound signal Associates a pressure value to every value of time and space coordinates.
An image or a picture has a color or brightness signal; a function of two dimensional location. Any object's appearance is represented as a reflected or emitted electromagnetic wave which is a type of electronic signal.
So any image has two components-
Color and brightness
Read More-
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FREQUENCY SPECTRUM OF AMPLITUDE MODULATION (WAVEFORMS AND EQUATIONS DERIVATION)
AMPLITUDE MODULATION (TIME DOMAIN EQUATIONS AND WAVEFORMS)
ADVANTAGES AND DISADVANTAGES OF DIGITAL COMMUNICATION SYSTEM
ADVANTAGES OF OPTICAL FIBER COMMUNICATION
STEP INDEX OPTICAL FIBER (MULTIMODE AND SINGLE MODE STEP INDEX FIBERS)
PULSE MODULATION TECHNIQUES (PAM, PWM, PPM, PCM)
OPTICAL FIBER: STRUCTURE AND WORKING PRINCIPLE
PULSE AMPLITUDE MODULATION (PAM)
COMPARISON OF PAM, PWM, PPM MODULATION TECHNIQUES
PULSE WIDTH MODULATION (PWM)
CONTINUOUS TIME AND DISCRETE TIME SIGNALS (C.T. AND D.T. SIGNALS)
NEED AND BENEFITS OF MODULATION
PULSE POSITION MODULATION (PPM)
OPTICAL FIBERS IN COMMUNICATION: COVERS ALL IMPORTANT POINTS
OPTICAL FIBER SOURCES (DESIRABLE PROPERTIES)
AMPLITUDE MODULATION Vs FREQUENCY MODULATION (ADVANTAGES AND DISADVANTAGES)
PULSE CODE MODULATION (PCM) [ADVANTAGES AND DISADVANTAGES]
SAMPLING THEOREM AND RECONSTRUCTION (SAMPLING AND QUANTIZATION)
SUPERPOSITION THEOREM (BASICS, SOLVED PROBLEMS, APPLICATIONS AND LIMITATIONS)
Digital Modulation Techniques (ASK, FSK, PSK, BPSK)/ Amplitude, Frequency and Phase Shift Keying
Conventional AM Vs DSB-SC Vs SSB-SC Vs VSB (Comparison of AM Systems)
Quadrature Amplitude Modulation (QAM)/ QAM Transmitter and QAM Receiver Block Diagram
Single-Mode Optical Fiber Advantages
What are Microwaves and their Applications (Uses) in various fields
Microwaves Properties and Advantages (Benefits)
Basic Structure of Bipolar Junction Transistor (BJT) - BJT Transistor - Working and Properties
Polar Plots of Transfer Functions in Control Systems (How to Draw Nyquist Plot Examples)
Generation of Binary Phase Shift Keying (BPSK Generation) - Block Diagram of Binary Phase Shift Keying (BPSK)
Low Level and High Level Modulation Block Diagram (AM Transmitter Block Diagram)
Block Diagram of CRO (Cathode Ray Oscilloscope), Components of CRO and CRT with Structure and Working
Slope Overload Distortion and Granular (Idle Noise), Quantization Noise in Delta Modulation
Frequency Translation/Frequency Mixing/Frequency Conversion/Heterodyning (Basic Concepts and Need)
Quadrature Phase Shift Keying Modulation (QPSK) Basics, Waveform and Benefits
Pulse Code Modulation (PCM) Vs Differential Pulse Code Modulation (DPCM)
Do you know, whether you are walking, singing, speaking or dancing... You are producing signals !!! Our whole universe is mathematical...
Definition of Signal
2. A Signal may be defined as a function of one or more independent variables like time, distance, position or temperature etc. that has some information about the phenomena (event) that produced it.
A signal can be a Motion signal, Sound signal, Image signal or Video signal etc. Now let's discuss each type of the signals-
Watch the Complete Video Here
Types of Signals
1. Motion signal
Any object that moves has a signal associated with it.To make it clear let's take an example-
The mathematical equation given below tells the position of a particle at any time instant-
x = 3t + 5
Here 'x' is the position and 't' is time
With the help of this equation you can easily find out the position of this particle at any time instant.
e.g. x = 5 at t = 0
x = 11 at t = 2
and so on...
One important example of the motion signal is RADAR which displays the motion of any aircraft as an electromagnetic signal.
Sound signal
When any medium (ex. air) vibrates it produces sound.Sound signal Associates a pressure value to every value of time and space coordinates.
Image signal
Do you know that image is also a signal !!!An image or a picture has a color or brightness signal; a function of two dimensional location. Any object's appearance is represented as a reflected or emitted electromagnetic wave which is a type of electronic signal.
So any image has two components-
Color and brightness
Video signal
A video signal is just a sequence of images. A Point in a video can be identified as its two dimensional position and time of its occurrence. This makes the video a three-dimensional entity having two dimensional position and time as the third dimension.Read More-
Go To HOME Page
FREQUENCY SPECTRUM OF AMPLITUDE MODULATION (WAVEFORMS AND EQUATIONS DERIVATION)
AMPLITUDE MODULATION (TIME DOMAIN EQUATIONS AND WAVEFORMS)
ADVANTAGES AND DISADVANTAGES OF DIGITAL COMMUNICATION SYSTEM
ADVANTAGES OF OPTICAL FIBER COMMUNICATION
STEP INDEX OPTICAL FIBER (MULTIMODE AND SINGLE MODE STEP INDEX FIBERS)
PULSE MODULATION TECHNIQUES (PAM, PWM, PPM, PCM)
OPTICAL FIBER: STRUCTURE AND WORKING PRINCIPLE
PULSE AMPLITUDE MODULATION (PAM)
COMPARISON OF PAM, PWM, PPM MODULATION TECHNIQUES
PULSE WIDTH MODULATION (PWM)
CONTINUOUS TIME AND DISCRETE TIME SIGNALS (C.T. AND D.T. SIGNALS)
NEED AND BENEFITS OF MODULATION
PULSE POSITION MODULATION (PPM)
OPTICAL FIBERS IN COMMUNICATION: COVERS ALL IMPORTANT POINTS
OPTICAL FIBER SOURCES (DESIRABLE PROPERTIES)
AMPLITUDE MODULATION Vs FREQUENCY MODULATION (ADVANTAGES AND DISADVANTAGES)
PULSE CODE MODULATION (PCM) [ADVANTAGES AND DISADVANTAGES]
SAMPLING THEOREM AND RECONSTRUCTION (SAMPLING AND QUANTIZATION)
SUPERPOSITION THEOREM (BASICS, SOLVED PROBLEMS, APPLICATIONS AND LIMITATIONS)
Digital Modulation Techniques (ASK, FSK, PSK, BPSK)/ Amplitude, Frequency and Phase Shift Keying
Conventional AM Vs DSB-SC Vs SSB-SC Vs VSB (Comparison of AM Systems)
Quadrature Amplitude Modulation (QAM)/ QAM Transmitter and QAM Receiver Block Diagram
Single-Mode Optical Fiber Advantages
What are Microwaves and their Applications (Uses) in various fields
Microwaves Properties and Advantages (Benefits)
Basic Structure of Bipolar Junction Transistor (BJT) - BJT Transistor - Working and Properties
Polar Plots of Transfer Functions in Control Systems (How to Draw Nyquist Plot Examples)
Generation of Binary Phase Shift Keying (BPSK Generation) - Block Diagram of Binary Phase Shift Keying (BPSK)
Low Level and High Level Modulation Block Diagram (AM Transmitter Block Diagram)
Block Diagram of CRO (Cathode Ray Oscilloscope), Components of CRO and CRT with Structure and Working
Slope Overload Distortion and Granular (Idle Noise), Quantization Noise in Delta Modulation
Frequency Translation/Frequency Mixing/Frequency Conversion/Heterodyning (Basic Concepts and Need)
Quadrature Phase Shift Keying Modulation (QPSK) Basics, Waveform and Benefits
Pulse Code Modulation (PCM) Vs Differential Pulse Code Modulation (DPCM)
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