ASK meaning in Electronics ?

Answer: What is Amplitude Shift Keying mean?

Amplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave.In an ASK system, a symbol, representing one or more bits, is sent by transmitting a fixed-amplitude carrier wave at a fixed frequency for a specific time duration. For example, if each symbol represents a single bit, then the carrier signal will be transmitted when the input value is 1, but will not be transmitted when the input value is 0.

Any digital modulation scheme uses a finite number of distinct signals to represent digital data. ASK uses a finite number of amplitudes, each assigned a unique pattern of binary digits. Usually, each amplitude encodes an equal number of bits. Each pattern of bits forms the symbol that is represented by the particular amplitude. The demodulator, which is designed specifically for the symbol-set used by the modulator, determines the amplitude of the received signal and maps it back to the symbol it represents, thus recovering the original data. Frequency and phase of the carrier are kept constant.

Like AM, an ASK is also linear and sensitive to atmospheric noise, distortions, propagation conditions on different routes in PSTN, etc. Both ASK modulation and demodulation processes are relatively inexpensive. The ASK technique is also commonly used to transmit digital data over optical fiber. For LED transmitters, binary 1 is represented by a short pulse of light and binary 0 by the absence of light. Laser transmitters normally have a fixed "bias" current that causes the device to emit a low light level. This low level represents binary 0, while a higher-amplitude lightwave represents binary 1.

The simplest and most common form of ASK operates as a switch, using the presence of a carrier wave to indicate a binary one and its absence to indicate a binary zero. This type of modulation is called on-off keying (OOK), and is used at radio frequencies to transmit Morse code (referred to as continuous wave operation),

More sophisticated encoding schemes have been developed which represent data in groups using additional amplitude levels. For instance, a four-level encoding scheme can represent two bits with each shift in amplitude; an eight-level scheme can represent three bits; and so on. These forms of amplitude-shift keying require a high signal-to-noise ratio for their recovery, as by their nature much of the signal is transmitted at reduced power.

ASK system can be divided into three blocks. The first one represents the transmitter, the second one is a linear model of the effects of the channel, the third one shows the structure of the receiver. The following notation is used:

ht(f) is the carrier signal for the transmissionhc(f) is the impulse response of the channeln(t) is the noise introduced by the channelhr(f) is the filter at the receiverL is the number of levels that are used for transmissionTs is the time between the generation of two symbols

Different symbols are represented with different voltages. If the maximum allowed value for the voltage is A, then all the possible values are in the range [−A, A] and they are given by:

v i = 2 A L − 1 i − A ; i = 0 , 1 , … , L − 1 {\displaystyle v_{i}={\frac {2A}{L-1}}i-A;\quad i=0,1,\dots ,L-1}

the difference between one voltage and the other is:

Δ = reference

Full Form	Category
Assessing Student Knowledge	Academic & Science
Academy Sharing Knowledge	Academic & Science
Alumni Sharing Knowledge	Academic & Science
Alpha Sigma Kappa	Academic & Science
한국음향학회	Academic & Science
Acoustical Society of Korea	Academic & Science
Academic Skills and Know	Academic & Science
American Student Knowledge	Academic & Science
Yamoussoukro	Airport Code
Adults Seeking Knowledge	Community
Ask, Seek, and Knock	Community
Advancing Self Knowledge	Community
Awareness, Service, and Knowledge	Community
Always Seek Knowledge	Community
Arts and Sciences for Kids	Community
Arts Society King (King Township, Ontario, Canada)	Community
Arts Society of Kingston	Community
Permission Coin	Cryptocurrency
Amplitude Shift Keying	Electronics
Attitude Skill And Knowledge	General
Adaptive Sequence Kontrol	General
Anomalous States Of Knowledge	General
Answers Service And Knowledge	General
Andreas Stelios Kostis	General
Attitudes Skills And Knowledge	General
Alternatives For Special Kids	General
Amanda Shae K	General
Access For Special Kids	General
Aim Shoot Kill	General
Advice Service And Knowledge	General
Authors Specialists And Knowledge	General
Ask Softly And Kindly	General
Author Specialist And Knowledge	General
Anomolous State Of Knowledge	General
Aiding Socialist Kauses	General
Anointed Spiritual Kinsmen	General
Astrological Society of Kentucky	General
Armijas Sporta Klubs	General
Animals Science and Know	General
Assistance Support and Kindness	General
Acquire Skill and Knowledge	General
Access Service Knowledge	General
Actie Schone Kunsten	General
Advocacy Support And Knowledge	General
Adaptive Sampling Kit	General
Advocating Success for Kids	General
Attitude Skills and Knowlledge	General
Autoimmunity Screening for Kids	General
Available Seat Kilometre	General
All Star Karting	General
Audio System Kontroller	General
Automoto Storiche Kroton	General
Auto Skoda Klub	General
Audi Service Komfort	General
Avalon Speedway Karts	General
Association Sportive Karting	General
Asking Saves Kids	Governmental
ARSIKERE JN	Indian Railway Station
Attitude, Skills, and Knowledge	Jobs
Available Seat Kilometres	Measurement Unit
Animals Seeking Kindness	Medical
Assault Survivor Kit	Medical
Autism Solution for Kids	Medical
Armor Survivability Kit	Military and Defence
Andros Town, Bahamas	Regional
Alaska's Serial Killerz	Regional
Accelerated Solutions Knowledgebase	Softwares
Arbeiter Sports Klub	Sports