e-Article
비트 패턴드 미디어 기록장치를 위한 부호율 9/12 고립패턴 제거 2차원 변조부호 / Code Rate 9/12 Isolated Patterns Removal 2D Modulation Code for Bit Patterned Media Recording
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
Korean
Abstract
본 논문에서는 비트 패턴드 미디어 기록방식(Bit patterned media recording, BPMR)을 위해 고립된 패턴을 제거하고 부분 최소해밍거리를 증가시킨 변조부호를 제안한다. 데이터의 증가로 인해 높은 기록밀도에 대한 요구가 증가되면서 차세대 저장기술인 BPMR 기록방식의 연구가 주목받게 되었다. BPMR 저장기술은 높은 기록밀도에서 하나의 비트를 하나의 섬에 저장한다. 따라서 더 높은 기록밀도를 달성하려면 인접 아일랜드(island) 간의 간격을 줄여야 하는데, 이 때문에 인접 심볼간 간섭과 트랙간 간섭의 영향이 증가하여 시스템의 성능이 저하된다. 이러한 간섭의 영향을 줄이기 위해 최소 해밍거리(minimum Hamming distance, MHD)을 증가한 2차원 변조부호를 제안한다. 제안하는 9/12 변조부호는 시스템의 성능을 향상하기 위해 부분적으로 MHD를 증가시킬 뿐만 아니라 트랙간 간섭을 줄이기 위해 트랙 방향의 고립된 패턴을 제거하며 기존의 변조부호를 사용할 때보다 성능을 향상한다.
In this paper, we propose a modulation code excluding isolated patterns and increasing part of minimum Hamming distance for bit patterned media recording (BPMR). As the demand for high recording density increases due to the increase in data, research on the BPMR recording method, which is a next-generation storage technology, has attracted attention. BPMR storage technology stores one bit in one island at high recording density. However, in order to achieve a higher recording density, the distance between adjacent islands is reduced, the effect of adjacent inter-symbol interference and inter-track interference increases, and system performance is degraded. In order to reduce the effect of such interference, a two-dimensional modulation code with an increased minimum Hamming distance (MHD) is proposed. The proposed 9/12 modulation code not only increases the MHD of the part to improve system performance, but also excludes isolated patterns in the cross-track direction to reduce inter-track interference, and improves performance compared to the case of using conventional modulation codes.
In this paper, we propose a modulation code excluding isolated patterns and increasing part of minimum Hamming distance for bit patterned media recording (BPMR). As the demand for high recording density increases due to the increase in data, research on the BPMR recording method, which is a next-generation storage technology, has attracted attention. BPMR storage technology stores one bit in one island at high recording density. However, in order to achieve a higher recording density, the distance between adjacent islands is reduced, the effect of adjacent inter-symbol interference and inter-track interference increases, and system performance is degraded. In order to reduce the effect of such interference, a two-dimensional modulation code with an increased minimum Hamming distance (MHD) is proposed. The proposed 9/12 modulation code not only increases the MHD of the part to improve system performance, but also excludes isolated patterns in the cross-track direction to reduce inter-track interference, and improves performance compared to the case of using conventional modulation codes.