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Author : Yunxiang Wu
Publisher :
ISBN 13 : 9780599921870
Total Pages : pages
Book Rating : 4.9/5 (218 download)
Download or read book Iterative Decoding for Magnetic Recording Channels written by Yunxiang Wu and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zining Wu
Publisher : Springer Science & Business Media
ISBN 13 : 146154565X
Total Pages : 165 pages
Book Rating : 4.4/5 (615 download)
Download or read book Coding and Iterative Detection for Magnetic Recording Channels written by Zining Wu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Author : Hongxin Song
Publisher :
ISBN 13 : 9780493509617
Total Pages : 133 pages
Book Rating : 4.5/5 (96 download)
Download or read book Applications of Iterative Decoding to Magnetic Recording Channels written by Hongxin Song and published by . This book was released on 2002 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : AbdelHakim Salem Alhussien
Publisher :
ISBN 13 :
Total Pages : 252 pages
Book Rating : 4.:/5 (952 download)
Download or read book Channel Matched Iterative Decoding for Magnetic Recording Systems written by AbdelHakim Salem Alhussien and published by . This book was released on 2009 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bane Vasic
Publisher : CRC Press
ISBN 13 : 0203490312
Total Pages : 742 pages
Book Rating : 4.2/5 (34 download)
Download or read book Coding and Signal Processing for Magnetic Recording Systems written by Bane Vasic and published by CRC Press. This book was released on 2004-11-09 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implementing new architectures and designs for the magnetic recording read channel have been pushed to the limits of modern integrated circuit manufacturing technology. This book reviews advanced coding and signal processing techniques and architectures for magnetic recording systems. Beginning with the basic principles, it examines read/write operations, data organization, head positioning, sensing, timing recovery, data detection, and error correction. It also provides an in-depth treatment of all recording channel subsystems inside a read channel and hard disk drive controller. The final section reviews new trends in coding, particularly emerging codes for recording channels.
Author : Travis Roger Oenning
Publisher :
ISBN 13 :
Total Pages : 290 pages
Book Rating : 4.:/5 (319 download)
Download or read book Channel Capacity and Coding for Magnetic Recording Channels with Media Noise written by Travis Roger Oenning and published by . This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John L. Fan
Publisher : Springer Science & Business Media
ISBN 13 : 1461515254
Total Pages : 268 pages
Book Rating : 4.4/5 (615 download)
Download or read book Constrained Coding and Soft Iterative Decoding written by John L. Fan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constrained Coding and Soft Iterative Decoding is the first work to combine the issues of constrained coding and soft iterative decoding (e.g., turbo and LDPC codes) from a unified point of view. Since constrained coding is widely used in magnetic and optical storage, it is necessary to use some special techniques (modified concatenation scheme or bit insertion) in order to apply soft iterative decoding. Recent breakthroughs in the design and decoding of error-control codes (ECCs) show significant potential for improving the performance of many communications systems. ECCs such as turbo codes and low-density parity check (LDPC) codes can be represented by graphs and decoded by passing probabilistic (a.k.a. `soft') messages along the edges of the graph. This message-passing algorithm yields powerful decoders whose performance can approach the theoretical limits on capacity. This exposition uses `normal graphs,' introduced by Forney, which extend in a natural manner to block diagram representations of the system and provide a simple unified framework for the decoding of ECCs, constrained codes, and channels with memory. Soft iterative decoding is illustrated by the application of turbo codes and LDPC codes to magnetic recording channels. For magnetic and optical storage, an issue arises in the use of constrained coding, which places restrictions on the sequences that can be transmitted through the channel; the use of constrained coding in combination with soft ECC decoders is addressed by the modified concatenation scheme also known as `reverse concatenation.' Moreover, a soft constraint decoder yields additional coding gain from the redundancy in the constraint, which may be of practical interest in the case of optical storage. In addition, this monograph presents several other research results (including the design of sliding-block lossless compression codes, and the decoding of array codes as LDPC codes). Constrained Coding and Soft Iterative Decoding will prove useful to students, researchers and professional engineers who are interested in understanding this new soft iterative decoding paradigm and applying it in communications and storage systems.
Author : Jiyang Yu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (9 download)
Download or read book Iterative Detection and Decoding for Two-dimensional Magnetic Recording Channels with Two-dimensional Intersymbol Interference written by Jiyang Yu and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zining Wu
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.:/5 (825 download)
Download or read book Coding, Iterative Detection and Timing Recovery for Magnetic Recording Channels written by Zining Wu and published by . This book was released on 1999 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Kuei-Che Cheng
Publisher :
ISBN 13 :
Total Pages : 476 pages
Book Rating : 4.:/5 (318 download)
Download or read book Algebraic Soft-decision Decoding Techniques for High-density Magnetic Recording written by Michael Kuei-Che Cheng and published by . This book was released on 2004 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Aravind Ratnakar Nayak
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (565 download)
Download or read book Iterative Timing Recovery for Magnetic Recording Channels with Low Signal-to-noise Ratio written by Aravind Ratnakar Nayak and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital communication systems invariably employ an underlying analog communication channel. At the transmitter, data is modulated to obtain an analog waveform which is input to the channel. At the receiver, the output of the channel needs to be mapped back into the discrete domain. To this effect, the continuous-time received waveform is sampled at instants chosen by the timing recovery block. Therefore, timing recovery is an essential component of digital communication systems. A widely used timing recovery method is based on a phase-locked loop (PLL), which updates its timing estimates based on a decision-directed device. Timing recovery performance is a strong function of the reliability of decisions, and hence, of the channel signal-to-noise ratio (SNR). Iteratively decodable error-control codes (ECCs) like turbo codes and LDPC codes allow operation at SNRs lower than ever before, thus exacerbating timing recovery. We propose iterative timing recovery, where the timing recovery block, the equalizer and the ECC decoder exchange information, giving the timing recovery block access to decisions that are much more reliable than the instantaneous ones. This provides significant SNR gains at a marginal complexity penalty over a conventional turbo equalizer where the equalizer and the ECC decoder exchange information. We also derive the Cramer-Rao bound, which is a lower bound on the estimation error variance of any timing estimator, and propose timing recovery methods that outperform the conventional PLL and achieve the Cramer-Rao bound in some cases. At low SNR, timing recovery suffers from cycle slips, where the receiver drops or adds one or more symbols, and consequently, almost always the ECC decoder fails to decode. Iterative timing recovery has the ability to corrects cycle slips. To reduce the number of iterations, we propose cycle slip detection and correction methods. With iterative timing recovery, the PLL with cycle slip detection and correction recovers most of the SNR loss of the conventional receiver that separates timing recovery and turbo equalization.
Author : G.C. Hadjipanayis
Publisher : Springer Science & Business Media
ISBN 13 : 9401006245
Total Pages : 610 pages
Book Rating : 4.4/5 (1 download)
Download or read book Magnetic Storage Systems Beyond 2000 written by G.C. Hadjipanayis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: An up-to-date and comprehensive review of magnetic storage systems, including particulate and rigid media, magnetic heads, tribology, signal processing spintronics, and other, future systems. A thorough theoretical discussion supplements the experimental and technical aspects. Each section commences with a tutorial paper, which is followed by technical discussions of current research in the area. Written at a level suitable for advanced graduate students.
Author : Erozan M. Kurtas
Publisher : CRC Press
ISBN 13 : 1420036491
Total Pages : 288 pages
Book Rating : 4.4/5 (2 download)
Download or read book Advanced Error Control Techniques for Data Storage Systems written by Erozan M. Kurtas and published by CRC Press. This book was released on 2018-10-03 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the massive amount of data produced and stored each year, reliable storage and retrieval of information is more crucial than ever. Robust coding and decoding techniques are critical for correcting errors and maintaining data integrity. Comprising chapters thoughtfully selected from the highly popular Coding and Signal Processing for Magnetic Recording Systems, Advanced Error Control Techniques for Data Storage Systems is a finely focused reference to the state-of-the-art error control and modulation techniques used in storage devices. The book begins with an introduction to error control codes, explaining the theory and basic concepts underlying the codes. Building on these concepts, the discussion turns to modulation codes, paying special attention to run-length limited sequences, followed by maximum transition run (MTR) and spectrum shaping codes. It examines the relationship between constrained codes and error control and correction systems from both code-design and architectural perspectives as well as techniques based on convolution codes. With a focus on increasing data density, the book also explores multi-track systems, soft decision decoding, and iteratively decodable codes such as Low-Density Parity-Check (LDPC) Codes, Turbo codes, and Turbo Product Codes. Advanced Error Control Techniques for Data Storage Systems offers a comprehensive collection of theory and techniques that is ideal for specialists working in the field of data storage systems.
Author : Steven Furnell
Publisher : Lulu.com
ISBN 13 : 1841021180
Total Pages : 187 pages
Book Rating : 4.8/5 (41 download)
Download or read book Advances in Network and Communications Engineering written by Steven Furnell and published by Lulu.com. This book was released on 2004-02-01 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Keattisak Sripimanwat
Publisher : Springer Science & Business Media
ISBN 13 : 140203685X
Total Pages : 393 pages
Book Rating : 4.4/5 (2 download)
Download or read book Turbo Code Applications written by Keattisak Sripimanwat and published by Springer Science & Business Media. This book was released on 2006-02-23 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turbo Code Applications: a journey from a paper to realization presents c- temporary applications of turbo codes in thirteen technical chapters. Each chapter focuses on a particular communication technology utilizing turbo codes, and they are written by experts who have been working in related th areas from around the world. This book is published to celebrate the 10 year anniversary of turbo codes invention by Claude Berrou Alain Glavieux and Punya Thitimajshima (1993-2003). As known for more than a decade, turbo code is the astonishing error control coding scheme which its perf- mance closes to the Shannon’s limit. It has been honored consequently as one of the seventeen great innovations during the ?rst ?fty years of information theory foundation. With the amazing performance compared to that of other existing codes, turbo codes have been adopted into many communication s- tems and incorporated with various modern industrial standards. Numerous research works have been reported from universities and advance companies worldwide. Evidently, it has successfully revolutionized the digital commu- cations. Turbo code and its successors have been applied in most communications startingfromthegroundorterrestrialsystemsofdatastorage,ADSLmodem, and ?ber optic communications. Subsequently, it moves up to the air channel applications by employing to wireless communication systems, and then ?ies up to the space by using in digital video broadcasting and satellite com- nications. Undoubtedly, with the excellent error correction potential, it has been selected to support data transmission in space exploring system as well.
Author : Thomas Victor Souvignier
Publisher :
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (318 download)
Download or read book Turbo Decoding for Partial Response Channels written by Thomas Victor Souvignier and published by . This book was released on 1999 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nitin Ashok Nangare
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (812 download)
Download or read book Non-iterative Joint Decoding and Signal Processing written by Nitin Ashok Nangare and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A non-iterative receiver is proposed to achieve near capacity performance on intersymbol interference (ISI) channels. There are two main ingredients in the proposed design. i) The use of a novel BCJR-DFE equalizer which produces optimal soft estimates of the inputs to the ISI channel given all the observations from the channel and L past symbols exactly, where L is the memory of the ISI channel. ii) The use of an encoder structure that ensures that L past symbols can be used in the DFE in an error free manner through the use of a capacity achieving code for a memoryless channel. Computational complexity of the proposed receiver structure is less than that of o̲n̲e̲ iteration of the turbo receiver. We also provide the proof showing that the proposed receiver achieves the i.i.d. capacity of any constrained input ISI channel. This DFE-based receiver has several advantages over an iterative (turbo) receiver, such as low complexity, the fact that codes that are optimized for memoryless channels can be used with channels with memory, and finally that the channel does not need to be known at the transmitter. The proposed coding scheme is universal in the sense that a single code of rate r; optimized for a memoryless channel, provides small error probability uniformly across all AWGN-ISI channels of i.i.d. capacity less than r. This general principle of a proposed non-iterative receiver also applies to other signal processing functions, such as timing recovery, pattern-dependent noise whitening, joint demodulation and decoding etc. This makes the proposed encoder and receiver structure a viable alternative to iterative signal processing. The results show significant complexity reduction and performance gain for the case of timing recovery and patter-dependent noise whitening for magnetic recording channels.
