Servo error integration in read-channel equalization

• US 6,498,694 B1
• Filed: 06/15/2000
• Issued: 12/24/2002
• Est. Priority Date: 06/15/1999
• Status: Expired due to Fees

• Current Assignee: Tokyo Electron Limited
• Original Assignee: Voyan Technology Incorporated (HP Inc.)
• Inventors: Shah, Sunil C.
• Primary Examiner(s): FABER, ALAN
• Application Number:
  US09/596,428
• Time in Patent Office: 922 Days
• Field of Search: 375/229, 375/230, 375/232, 375/346, 360/53, 360/65, 360/46, 360/77.02, 360/77.08, 360/78.04, 360/78.09
• US Class Current: 360/46
• CPC Class Codes: G11B 11/10576 with provision for moving the transducers for maintaining alignment or spacing relative to the carrier
• CPC Class Codes: G11B 20/10009 Improvement or modification of read or write signals
• CPC Class Codes: G11B 5/09 Digital recording
• CPC Class Codes: G11B 5/59627 Aligning for runout, eccentricity or offset compensation G11B5/5534, G11B5/59677, G11B5/59688 take precedence
• CPC Class Codes: G11B 7/0901 for track following only G11B7/0925, G11B7/094, G11B7/0941, G11B7/0943, G11B7/0945, G11B7/0946, G11B7/0948 take precedence
• CPC Class Codes: G11B 7/0953 to compensate for eccentricity of the disc or disc tracks

Abstract

A method and system for servo error integration in read-channel equalization are described. In the present invention servo error is integrated into an equalizer. Also described in the present invention are methods and systems for determining the servo error.

Claims

1. A computer readable medium containing executable instructions which, when executed in a processing system, cause said system to perform a method comprising:

integrating a servo positioning error into a read-channel equalizer.

2. A method comprising:

estimating a servo positioning error; and

integrating the servo positioning error into a read-channel equalizer.

3. A method comprising:

estimating a servo positioning error for a media storage system; and

integrating the servo positioning error into a read-channel equalizer of the media storage system.

4. The method of claim 3 wherein the servo positioning error is the positioning error of the actuator head in a rotating media storage system.

5. The method of claim 3 further comprising:

modeling a most likely actuator head position for the media storage system.

6. The method of claim 3 wherein integrating the servo positioning error into a read channel equalizer comprises:

equalizing a read signal based upon the estimated servo positioning error; and

equalizing the read signal based upon an additive white noise.

7. A computer readable medium containing executable instructions which, when executed in a processing system, cause said system to perform a method comprising:

estimating a servo positioning error; and

integrating the servo positioning error into a read-channel equalizer.

8. A computer readable medium containing executable instructions which, when executed in a processing system, cause said system to perform a method comprising:

estimating a servo positioning error for a media storage system; and

integrating the servo positioning error into a read-channel equalizer of the media storage system.

9. The computer readable medium of claim 8 wherein the servo positioning error is the positioning error of the actuator head in a rotating media storage system.

10. The computer readable medium of claim 8 further comprising:

modeling a most likely actuator head position for media storage system.

11. The computer readable medium of claim 8 wherein integrating the servo positioning error into a read channel equalizer comprises:

equalizing a read signal based upon the estimated servo positioning error; and

equalizing the read signal based upon an additive white noise.