Basic Forward Error Correction

The IEEE (Ref. 3) defines a forward error-correcting system "as a system employing an error-correcting code and so arranged that some or all of the signals detected as being in error are automatically corrected at the receiving terminal before delivery to the data sink or to the telegraph receiver.''

Our definition may help clarify the matter. FEC is a method of error control that employs the adding of systematic redundancy at the transmit end of a link such that many or all of the errors caused by the medium can be

Binary data source

Rs

Encoder

Rc

Modulator

Transmission Medium

Receiver

Rc

Decoder

Rs

Binary data sink

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