Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Structured set partitioning and multilevel coding for partial response channels

a technology of partial response channel and structure set, applied in the field of coding and decoding data for transmission through a partial response channel, can solve problems such as complex design tradeoffs that keep changing

Active Publication Date: 2007-05-03
SEAGATE TECH LLC
View PDF15 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a way to encode and decode user data. The encoding process involves using a special technique to remove any unwanted data and generate redundant bits. These bits are then combined with the original data to create a more efficient data sequence. The decoding process involves detecting the encoded data, decoding it using a special technique, and then removing the redundant bits to create a final output. The technical effect of this patent is to provide a more efficient way to encode and decode user data, which can be useful in various applications such as data storage and transmission.

Problems solved by technology

The increasing demand for high data rate communications systems and high-density data storage devices has lead to intensive focus on implementation issues of encoding and decoding that provides a combination of low bit error rate (BER), high speed, low power coding and decoding, and low cost.
In designing encoders and decoders, there are complex design tradeoffs that keep changing as technologies advance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Structured set partitioning and multilevel coding for partial response channels
  • Structured set partitioning and multilevel coding for partial response channels
  • Structured set partitioning and multilevel coding for partial response channels

Examples

Experimental program
Comparison scheme
Effect test

example

[0120] Presented below is an SSP / MLC architecture for perpendicular recording read channels. In order for the application of SSP / MLC, the following constraints are accomplished from the complexity and system performance perspective:

[0121] 1. ML decoding trellis size falls into a reasonable range, e.g., 32 states or 64 states;

[0122] 2. SSP / MLC is compatible with RLL and DCF encoding;

[0123] 3. Performance gain can be obtained at sector failure rate (SFR) level.

[0124] Investigation of SSP / MLC for recording channels suggests that an L=4 level SSP is usually desired for a balanced trade-off between performance and complexity. With a front-end equalization target of length m=3, such a configuration suggests a trellis size of 2m+L−1=64 states, excluding any other augmentation effect resulted from MLC. However, by applying the technique presented below, it is possible to reduce the number of states to 32 states when the component codes operate only on the bits at the first partition lev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method and apparatus for channel coding useful for recording channel and other communications applications. The proposed channel coding method is actualized via structured set partition (SSP) in conjunction with multilevel coding (MLC) and offers performance gains over conventional coding schemes with comparable complexity at the bit-error rate (BER) level as well as the sector failure rate (SFR) level.

Description

FIELD OF THE INVENTION [0001] The present invention relates generally to coding and decoding data for transmission through a partial response channel, and more particularly but not by limitation to coding and decoding data for transmission through a data storage channel. BACKGROUND OF THE INVENTION [0002] Data communication channels generally include encoding of data before it passes through a communication medium, and decoding of data after it has passed through a communication medium. Data encoding and decoding is used, for example, in data storage devices for encoding data that is written on a storage medium and decoding data that is read from a storage medium. Encoding is applied in order to convert the data into a form that is compatible with the binary characteristic of the storage medium, and can include processes such as adding error correction codes, interleaving, turbo encoding, bandwidth limiting, amplification and many other known encoding processes. Decoding processes a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): H03M7/00
CPCG11B20/10009G11B20/10055
Inventor YANG, XUESHIKUZNETSOV, ALEXANDER
Owner SEAGATE TECH LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com