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Dec 22, 2023 · What is Forward Error Correction? FEC stands for Forward Error Correction, a proficient digital signal processing technique to enhance the bit error rate of communication links. This method involves adding redundant information, specifically parity bits, to the data at the transmitter side.
In computing, telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
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What is forward error correction (FEC)?
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Forward error correction works by adding redundant bits to a bitstream to help the decoder detect and correct some transmission errors without the need for retransmission. The name forward stems from the fact that the flow of data is always in the forward direction (i.e., from encoder to decoder).
Jun 4, 2020 · There are various FEC techniques designed for this purpose. These are as follows : 1. Using Hamming Distance: For error correction, the minimum hamming distance required to correct t errors is: For example, if 20 errors are to be corrected then the minimum hamming distance has to be 2*20+1= 41 bits. This means, lots of redundant bits need to be ...
Jul 1, 2019 · In communication systems, information theory, and coding theory, forward error correction (FEC) is a technique used for controlling errors in data transmission over unreliable or noisy communication channels. FEC owes its beginnings to the pioneering work of Claude Shannon in 1948 on reliable communication over noisy transmission channels [1].
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Three common methods for error detection: Parity. Checksum. Cyclic redundancy check (CRC) Generally, these methods do not provide any way to locate/correct the errors. If an error is detected in a block of data, the block of data must be retransmitted. Problems: What if link is not bi-directional, e.g., HDTV?
Jan 1, 2010 · In this chapter, forward error correction (FEC) techniques for optical communications are described. In Sect. 17.1, the basic concepts of FEC and its terminology are explained. The various FECs developed to date for optical communications are classified as belonging to three generations.
