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A New Family of Constrained Codes with Applications in Data Storage
Date
2019-08-01
Author
Hareedy, Ahmed
Calderbank, Robert
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© 2019 IEEE.Line codes make it possible to mitigate interference, to prevent short pulses, and to generate streams of bipolar signals with no direct-current (DC) power content through balancing. They find application in magnetic recording (MR) devices, in Flash devices, and in optical recording devices. This paper introduces a new family of fixed-length, binary constrained codes, named lexicographically-ordered constrained codes (LOCO codes), for bipolar non-return-to-zero signaling. LOCO codes are capacity achieving, the lexicographic indexing enables simple, practical encoding and decoding, and this simplicity is demonstrated through analysis of circuit complexity. Experimental results demonstrate a gain of up to 10% in rate achieved by LOCO codes with respect to practical run-length-limited codes designed for the same purpose. Simulation results suggest that it is possible to achieve channel density gains of about 20% in MR systems by using a LOCO code to encode only the parity bits of a low-density parity-check code before writing.
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85081107321&origin=inward
https://hdl.handle.net/11511/98441
DOI
https://doi.org/10.1109/itw44776.2019.8989270
Conference Name
2019 IEEE Information Theory Workshop, ITW 2019
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
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A. Hareedy and R. Calderbank, “A New Family of Constrained Codes with Applications in Data Storage,” presented at the 2019 IEEE Information Theory Workshop, ITW 2019, Visby, İsveç, 2019, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85081107321&origin=inward.