Precise write-time compensation for nonlinear transition shift in magnetic tape recording using a <i>d</i>=1 RLL code

作     者：Uehara, T Majima, K Ogawa, S Numazawa, J 

作者机构：NHK Sci & Tech Res Labs Tokyo 1578510 Japan Engn Adm Dept NHK Tokyo 1578001 Japan 

出 版 物：《IEICE TRANSACTIONS ON ELECTRONICS》 (电子情报通信学会汇刊，英文版，C:电子学)

年 卷 期：1999年第E82C卷第12期

页      面：2234-2240页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：write-time compensation nonlinear transition shift VCR RLL code 

摘      要：We propose precise write-time compensation for nonlinear transition shift in magnetic tape recording using d = 1 runlength-limited (RLL) code as a channel modulation. In this write-time compensation approach, the write current transitions having a transition within 3 bits earlier are shifted so as to minimize the transition shift of the readback signal. First, we precisely measured the nonlinear transition shift using a VCR. Next, based on this measurement, we simulated the effects of the write-time compensation, verifying them in recording experiments with a VCR. The results show that when the optimum read equalization is applied to the readback signal, this write-time compensation approach increases the eye height and eye width while improving the byte error rate by about two orders.