Frequency, phase, and gain estimation technique for use in a read channel receiver of a hard disk drive

a technology of read channel receiver and gain estimation, which is applied in the direction of digital recording, recording signal processing, instruments, etc., can solve the problems of significant impact on the ability of data to be properly read, and the performance of the hard disk drive, so as to optimize the performance of the read channel receiver

Inactive Publication Date: 2008-11-13
AVAGO TECH WIRELESS IP SINGAPORE PTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enhances the accuracy and efficiency of data reading by reducing the number of bytes required in preambles, thereby increasing storage capacity and reducing noise interference.

Problems solved by technology

The presence of noise may significantly affect the ability of the data to be properly read when inadequate gain control and timing recovery mechanisms are implemented.
In such an instance, the performance of the hard disk drive may be significantly affected.

Method used

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  • Frequency, phase, and gain estimation technique for use in a read channel receiver of a hard disk drive
  • Frequency, phase, and gain estimation technique for use in a read channel receiver of a hard disk drive
  • Frequency, phase, and gain estimation technique for use in a read channel receiver of a hard disk drive

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Embodiment Construction

[0019]Aspects of the invention provide for one or more methods and systems for acquiring gain and timing information from one or more preambles of one or more data sectors of a hard disk drive. The gain and timing information is used to optimize performance of the read channel receiver as it reads data stored in the hard disk drive. Aspects of the one or more methods and systems improves the performance of a hard disk drive. The performance is improved by implementing an improved system and method of acquiring timing and gain information / parameters by the read channel receiver of the hard disk drive. Aspects of the invention employ one or more systems and methods of determining the frequency and phase offsets of a hard disk drive read channel, used for timing and gain acquisition in the read channel receiver. The one or more systems and methods utilize the data provided by each preamble of a data sector in a hard disk drive. The frequency and phase offsets are used to more accuratel...

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Abstract

One or more methods and systems are presented for performing gain and timing acquisition of data read from one or more data sectors of a hard disk drive. The gain and timing information may be used to synchronize a read channel receiver of the hard disk drive to the data read from the data sector(s). In a representative embodiment, the one or more methods comprises determining one or more frequency and phase offsets using one or more preambles of one or more data sectors residing in a hard disk drive. In a representative embodiment, the gain of the one or more preambles may be determined. In another representative embodiment, the one or more systems used to determine one or more phase and frequency offsets, and amplitudes, comprise hardware and / or software capable of utilizing a sequence of consecutive samples provided by one or more preambles of one or more data sectors.

Description

RELATED APPLICATIONS / INCORPORATION BY REFERENCE[0001][Not Applicable]FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002][Not Applicable]MICROFICHE / COPYRIGHT REFERENCE[0003][Not Applicable]BACKGROUND OF THE INVENTION[0004]When data is read from a hard disk drive, the read channel must be adequately synchronized so that it may correctly read the data stored in the hard disk drive. In addition, the receiver gain must be adjusted in order to properly read the data. The presence of noise may significantly affect the ability of the data to be properly read when inadequate gain control and timing recovery mechanisms are implemented. In such an instance, the performance of the hard disk drive may be significantly affected.[0005]Further limitations and disadvantages of conventional and traditional approaches will become apparent to one of skill in the art, through comparison of such systems with some aspects of the present invention as set forth in the remainder of the present application with...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G11B20/10
CPCG11B20/10009G11B20/10027G11B20/10037G11B20/10222G11B27/3027
InventorPAN, CHENGZHIVITYAEV, ANDREI
OwnerAVAGO TECH WIRELESS IP SINGAPORE PTE