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

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In C-RAN research, different functional splits are considered for 5G mobile crosshaul networks. The typical fronthaul network based on optical fibers will be affected by the functional split. In some cases, it can be advantageous that the sequences of digital bits transmitted in fronthaul channels are runlength length limited (RLL). Therefore, in this paper a technique is presented which allows us to implement RLL properties into 5G LDPC codes specified in ETSI TS 138 212 without adding any additional redundancy and without changing the basic encoding and decoding algorithms. When compared with ordinary scrambling the new technique offers the advantage of guaranteeing the maximal runlength value.

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This work was supported by the Slovak Research and Development Agency under the Contract No. APVV-19-0436 and it was also supported by the Scientific Grant Agency of the Ministry of Education of Slovak Republic and Slovak Academy of Sciences (Grant VEGA 1/0477/18).

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Correspondence to Martin Rakús.

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Farkaš, P., Rakús, M. & Páleník, T. A New Technique for Incorporating RLL Properties into 5G LDPC Codes Without Additional Redundancy. Wireless Pers Commun 119, 749–762 (2021).

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