Definition Of Forward Error Correction
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(Discuss) Proposed since January 2015. In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding[1] is a technique used for controlling forward error correction tutorial errors in data transmission over unreliable or noisy communication channels. The
Forward Error Correction Ppt
central idea is the sender encodes the message in a redundant way by using an error-correcting code forward error correction 3/4 (ECC). The American mathematician Richard Hamming pioneered this field in the 1940s and invented the first error-correcting code in 1950: the Hamming (7,4) code.[2] The redundancy allows the receiver forward error correction algorithm to detect a limited number of errors that may occur anywhere in the message, and often to correct these errors without retransmission. FEC gives the receiver the ability to correct errors without needing a reverse channel to request retransmission of data, but at the cost of a fixed, higher forward channel bandwidth. FEC is therefore applied in situations
Forward Error Correction Rate
where retransmissions are costly or impossible, such as one-way communication links and when transmitting to multiple receivers in multicast. FEC information is usually added to mass storage devices to enable recovery of corrupted data, and is widely used in modems. FEC processing in a receiver may be applied to a digital bit stream or in the demodulation of a digitally modulated carrier. For the latter, FEC is an integral part of the initial analog-to-digital conversion in the receiver. The Viterbi decoder implements a soft-decision algorithm to demodulate digital data from an analog signal corrupted by noise. Many FEC coders can also generate a bit-error rate (BER) signal which can be used as feedback to fine-tune the analog receiving electronics. The noisy-channel coding theorem establishes bounds on the theoretical maximum information transfer rate of a channel with some given noise level. Some advanced FEC systems come very close to the theoretical maximum. The maximum fractions of errors or of missing bits that can be corrected is determined by the design of
existing architecture, but does not get a lot of attention. In many cases, lurking servers show up after being disregarded for a while, as a forward error correction ethernet result of scaling processes where the company keeps building onto a hardware forward error correction library setup without really taking stock of what is already there. Read more Newest Terms Digital Footprint Code Generation
Forward Error Correction Pdf
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irregardless a word? Favorite Button CITE Translate Facebook Share Twitter Tweet Google+ Share forward error correction forward error http://www.dictionary.com/browse/forward-error-correction correction in Technology Expand algorithm (FEC) A class of methods for controling errors in a one-way communication system. FEC sends extra information along with the data, which can be used by the receiver to check and correct the data. A CPU writing data to RAM is forward error a kind of one-way communication - see error correcting memory and error checking and correction. (1996-10-02) The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org Cite This Source Discover our greatest slideshows 8 Offbeat Literary Genres to Get... Decode the pieces of our favorite... Know forward error correction These 9 Commonly Confused... Uncover the mysteries of the marks... Browse more topics on our blog What Is the Difference Between Discreet and Discrete? Learn the correct uses of these two commonly confused homophones. What Character Was Removed from the Alphabet? What mistaken pronunciation gave this character its name? Apostrophes 101 This small mark has two primary uses: to signify possession or omitted letters. How Do I Get a Word into the Dictionary? People invent new words all the time, but which ones actually make it? Word of the Day Word Value for forward 14 14 Scrabble Words With Friends Nearby words for forward error correction forward delivery forward delta forward dive forward echelon forward engineering forward error correction forward exchange forward heart failure forward market forward mutation forward pass Pokémon Words About Terms & Privacy ©2016 Dictionary.com, LLC.