A New Technique for Incorporating RLL Properties into 5G LDPC Codes Without Additional Redundancy

Farkas, Peter; Rakús, Martin; Palenik, Tomas

doi:10.1007/s11277-021-08235-3

Cited by 4 publications

(6 citation statements)

References 17 publications

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“…There are different known approaches how to find a modifier and appropriate reordering connected with it [35,43,44,45,46,47,48,49,50,51,52,53] based on the structural properties of the original ECCs.…”

Section: Introduction To the Methods For Obtaining Rll-eccs And Some ...mentioning

confidence: 99%

“…Later different approaches were developed based on these properties and applied to numerous different ECCs [43,44,45,46,47,48,49,50,51,52]. Recently it was shown that related techniques could also be applied on standardized LDPC codes for 5G mobile networks [53]. Therefore a natural question arises as to whether there are also other standardized LDPC codes for which it could lead to obtaining RLLL ECCs.…”

Section: State Of the Art Of Transcontrol Codes Constructions Based O...mentioning

confidence: 99%

“…However, the known methods presented in [35,43,44,45,46,47,48,49,50,51,52,53] could not be applied without modifications to the standard CCSDS codes. Therefore, the purpose of this paper is to present a way how some of the mentioned techniques could be adapted to get RLL-ECCs from these codes.…”

Section: State Of the Art Of Transcontrol Codes Constructions Based O...mentioning

confidence: 99%

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Adding RLL Properties to Four CCSDS LDPC Codes without Increasing Their Redundancy

Farkas

Rakús²

2023

cai

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This paper presents the construction of Run Length Limited (RLL) Error Control Codes (ECCs) from four Low Density Parity Check (LDPC) Codes specified by Consultative Committee for Space Data Systems (CCSDS). The obtained RLL-ECCs present a practical alternative to the CCSDS codes with pseudorandomizers. Their advantage is that the maximal runlengths of equal symbols in their codeword sequences are guaranteed, which is not the case if the common approach with pseudo-randomizers is used. The other advantages are that no additional redundancy is introduced into encoded codewords and that the encoding and decoding procedures of the original error control CCSDS codes do not have to be modified in the following cases. In the first case if hard decoding is used and the transmission channel can be modeled as a Binary Symmetric Channel (BSC) or in the second case if soft decoding and coherent Binary Phase Shift Keying (BPSK) 158 P. Farkaš, M. Rakús modulation is used and the appropriate transmission channel model is an Additive White Gaussian Noise (AWGN) channel.

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Section: Introduction To the Methods For Obtaining Rll-eccs And Some ...mentioning

confidence: 99%

Section: State Of the Art Of Transcontrol Codes Constructions Based O...mentioning

confidence: 99%

Section: State Of the Art Of Transcontrol Codes Constructions Based O...mentioning

confidence: 99%

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Adding RLL Properties to Four CCSDS LDPC Codes without Increasing Their Redundancy

Farkas

Rakús²

2023

cai

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“…One approach to overcoming this problem with ordering the codes in cascade, at least for cascading RLL and ECCs, is to construct combined codes denoted as RLL-ECCs [11][12][13][14][15][16][17][18][19][20][21][22][23], which have RLL and error control properties simultaneously. Recently RLL-ECCs were obtained from 5G LDPC (low density parity check) codes, [11]. The question arose if a related construction technique could be applied also to other standardized codes, for example to some of the CCSDS codes in order to obtain RLL-ECCs.…”

Section: Introductioonmentioning

confidence: 99%

“…The main problem which has to be solved before the method could be applied in practice is to find a modifier which will decrease the otherwise infinite run lengths in the codeword sequence of the original ECC. There are different approaches known regarding how to find a modifier [11][12][13][14][15][16][17][18][19][20][21][22][23] based on the structural properties of the original ECCs.…”

Section: Introductioonmentioning

confidence: 99%

Run length limited CCSDS convolutional codes for optical communications

Farkas

Divinec

Rakús

2022

Journal of Electrical Engineering

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This paper presents the construction of RLL-ECCs (run length limited error control codes) from three selected ECCs specified by Consultative Committee for Space Data Systems (CCSDS) for optical communications. The RLL-ECCs obtained present a practical alternative to CCSDS codes with pseudo-randomizers. Their advantage is that the maximal run lengths of equal symbols in their codeword sequences are guaranteed, which is not the case if the common approach with pseudo-randomizers is used. The other advantages are that no additional redundancy is introduced into encoded codewords and that the encoding and decoding procedures of the original error control CCSDS codes do not have to be modified in the following cases: Firstly, if hard decoding is used and the transmission channel can be modeled as a BSC (binary symmetric channel) and secondly, if soft decoding and coherent BPSK (binary phase shift keying) modulation is used and the appropriate transmission channel model is an AWGN (additive white Gaussian noise) channel.

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Run Length Limited Error Control Codes Derived from Reed Solomon Codes

Farkaš,

Rakús

2023

Wireless Pers Commun

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Reed Solomon codes were standardized for numerous wireless communication systems. Most practical Reed Solomon codes belong to non-binary linear block codes defined over finite fields with characteristic two. Each linear block code contains one codeword composed of all zeros. The concatenation of this and also other codewords can lead to long, theoretically even infinite, runs of equal symbols. Such long runs do not support synchronization in wireless receivers and therefore are unwanted. In this paper it is shown that extended and some appropriately shortened Reed Solomon codes constructed over finite fields with characteristic two can be transformed into Run Length Limited Reed Solomon codes. The presented method, if applicable, allows for doing it without inserting additional redundancy. Another advantage is that after the transformation, if some round conditions are fulfilled, the decoding does not have to be rebuilt.

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A New Technique for Incorporating RLL Properties into 5G LDPC Codes Without Additional Redundancy

Cited by 4 publications

References 17 publications

Adding RLL Properties to Four CCSDS LDPC Codes without Increasing Their Redundancy

Adding RLL Properties to Four CCSDS LDPC Codes without Increasing Their Redundancy

Run length limited CCSDS convolutional codes for optical communications

Run Length Limited Error Control Codes Derived from Reed Solomon Codes

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