Definition

forward error correction (FEC)

Forward error correction (FEC) is a method of obtaining error control in data transmission in which the source (transmitter) sends redundant data and the destination (receiver) recognizes only the portion of the data that contains no apparent errors. Because FEC does not require handshaking between the source and the destination, it can be used for broadcasting of data to many destinations simultaneously from a single source.

In the simplest form of FEC, each character is sent twice. The receiver checks both instances of each character for adherence to the protocol being used. If conformity occurs in both instances, the character is accepted. If conformity occurs in one instance and not in the other, the character that conforms to protocol is accepted. If conformity does not occur in either instance, the character is rejected and a blank space or an underscore (_) is displayed in its place.

Simple FEC is one of two modes used by radio amateurs in a self-correcting digital mode called AMTOR (an abbreviation for amateur teleprinting over radio). It is sometimes called Mode B. The other AMTOR mode, automatic repeat request (ARQ), involves handshaking and is also used with communications systems such as Global System for Mobile (GSM). In amateur radio, ARQ is sometimes called AMTOR Mode A.

This was last updated in May 2007
Posted by: Margaret Rouse

Email Alerts

Register now to receive SearchMobileComputing.com-related news, tips and more, delivered to your inbox.
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

More News and Tutorials

  • Rugged mobile devices must be more than durable in harsh environments

    The durability of ruggedized mobile devices is only the first consideration for mobile managers with workers who take devices into hazardous environments. Connectivity, usability and portability are also important features.

  • Mobile phone beats out smartphone as device of choice

    Mobile phones edged out smartphones as the most commonly used devices in organizations, according to SearchMobileComputing.com's recent survey, which also found that many companies support any kind of devices brought in by users.

  • Mobile data services -- getting connected

    Mobile data computing continues to grow as more service providers offer services and at increasing speeds. Different ways to connect to the mobile data network are discussed in this tip by Paul DeBeasi.

Do you have something to add to this definition? Let us know.

Send your comments to techterms@whatis.com

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: