Invention Grant
- Patent Title: Implementing BER-list modulation code for hard disk drives
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Application No.: US15395150Application Date: 2016-12-30
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Publication No.: US09886979B1Publication Date: 2018-02-06
- Inventor: Richard Leo Galbraith , Weldon Mark Hanson , Iouri Oboukhov , Gary William Walker
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA San Jose
- Assignee: Western Digital Technologies, Inc.
- Current Assignee: Western Digital Technologies, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Patterson + Sheridan, LLP
- Main IPC: G11B5/02
- IPC: G11B5/02 ; G11B20/18
Abstract:
A method, apparatus, and system are provided for implementing an enhanced modulation code for hard disk drives (HDDs). A modulation code directly uses Bit Error Rate (BER) information for different user patterns to construct a coded word minimizing possible error rate. The modulation code has a flexible code rate that simplifies code optimization relative to Coded Bit Density (CBD), signal to noise ratio (SNR) and noise color.
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