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Dec 22, 2023 · FEC (Forward Error Correction) encodes signals as "0" and "1" for transmission, addressing errors within its correction capability. This enables error-free reception without re-transmission when errors fall within the FEC's range.
Nowadays, forward error correction (FEC) is widely used in communication systems for error detection and correction. This paper is a brief introduction about FECs. We firstly introduced the basic principles of FECs and how it works. Different types of FECs are used for different conditions.
- Zheng Yuan, Xinchen Zhao
- 2012
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The first use of FEC helps to extend the reach of optical links, the second use helps to suppress nonlinear fiber effects. Moreover, the of FEC in low-cost systems permits the used of lower quality optoelectronic components by correcting for potentially harmful BER floors [2]. FEC Based on Reed–Solomon Code.
code we can use. There is no theoretical foundation for how the code is constructed, nor any guarantee on its performance. Error-correcting c odes are classified in a few different ways. The first distinction iswhetheritisablockcode oraconvolutional code.Thedifferencebetweenthe two is in the nature of the input to the encoder/decoder. In Fig. 6.2
- Turbo Decoder
- LDPC Decoder
- Polar Decoder
Among the three code classes, decoders for Turbo codes are most challenging to implement for throughputs toward Tb/s. In its basic form, a Turbo decoder consists of two component decoders connected through an interleaver and a de-interleaver. It applies an iterative loop, exchanging extrinsic information between its two components, cooperatively im...
Unlike Turbo decoders, which suffer from sequential behavior, LDPC codes have an inherent parallelism. State-of-the-art LDPC decoders apply BP algorithm for decoding that iteratively exchanges messages between variable and check nodes on the Tanner graph. The structure of the Tanner graph is defined by the parity-check matrix H. In BP, all check no...
Polar codes, invented by Arikan , has recently received considerable attention in the context of 5G. Successive cancellation (SC) and successive cancellation list (SCL) are the most prominent decoding algorithms for Polar codes. SC comes with a low algorithmic decoding complexity but a limited error correction performance for finite code lengths. ...
In particular, he showed it was possible to achieve reliable communications, i.e., error-free communications, over an unreliable, i.e., noisy, discrete memory-less channel (DMC), using block codes at a rate less than the channel capacity if the number of letters per code word, and consequently, the number of code words, are made arbitrarily ...
Abstract: Forward error correction coding is the most common way of channel coding and the key point of error correction coding. Therefore, the recognition of which coding type is an important issue in non-cooperative communication. At present, the recognition of FEC codes is mainly concentrated
