Coding and Iterative Detection for Magnetic Recording Channels: 531 (The Springer International Series in Engineering and Computer Science, 531) - Hardcover

Wu, Zining

Hardcover

ISBN 10: 0792377176 ISBN 13: 9780792377177

Publisher: Springer, 2000

Synopsis

The advent of the internet age has produced enormous demand for in­ creased storage capacity and for the consequent increases in the amount of information that can be stored in a small space. While physical and media improvements have driven the majority of improvement in modern storage systems, signal processing and coding methods have increasing­ ly been used to augment those improvements. Run-length-limited codes and partial-response detection methods have come to be the norm in an industry that once rejected any sophistication in the read or write pro­ cessing circuits. VLSI advances now enable increasingly sophisticated signal processing methods for negligible cost and complexity, a trend sure to continue even as disk access speeds progress to billions of bits per second and terabits per square inch in the new millennium of the in­ formation age. This new book representing the Ph. D. dissertation work of Stanford's recent graduate Dr. Zining Wu is an up-to-date and fo­ cused review of the area that should be of value to those just starting in this area and as well those with considerable expertise. The use of saturation recording, i. e. the mandated restriction of two-level inputs, creates interesting twists on the use of communica­ tion/transmission methods in recording.

About this title

Synopsis

This book is a useful tool for researchers in both academia and industry who are interested in improving the performances of magnetic recording systems using new coding schemes. "Coding and Iterative Detection for Magnetic Recording Channels" proposes several new approaches for enhancing the performance of magnetic recording systems by coding and interpolated timing recovery. It provides a tutorial introduction to turbo codes, LDPC codes and their iterative detection schemes. The main emphasis, however, is placed on the simplification of the detector structures for the implementation of various codes.Chapter 1 introduces the model for magnetic recording channels and the challenges to the read channel detector designs. Chapter 2 discusses the turbo codes and the turbo equalization structure for ISI channels. Chapter 3 summarizes the major concepts of LDPC codes and their iterative detection algorithms based on belief propagation. Chapter 4 introduces the Decision Aid Equalization (DAE) structure to simplify iterative detection for ISI channels. Chapter 6 proposes an interpolated timing recovery scheme that facilitates symbol timing recovery by its 're-sampling' capability.The combination of the above-mentioned chapters leads to a new structure for implementing iterative detection on recording channels.

Chapter 5 deviates from iterative detection to propose a simple code, the Interleaved Parity Check (IPC) code, and its reduced-complexity decoder, which is considered practical for implementation with currently available integrated circuit technology. Chapter 7 summarizes the book with a discussion on future research topics in this field. "Coding and Iterative Detection for Magnetic Recording Channels" is a valuable reference for researchers and design engineers working on signal processing and coding for magnetic recording channels. It may also be used as a graduate text for courses on turbo codes.

Edition details

• Publisher: Springer
• Publication date: 2000
• Language: English
• ISBN 10: 0792377176
• ISBN 13: 9780792377177
• Binding: Hardcover
• Number of pages: 172