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Author : Stephan Stiglmayr
Publisher :
ISBN 13 :
Total Pages : 85 pages
Book Rating : 4.:/5 (314 download)
Download or read book Signal Processing and Detection for Digital Magnetic Storage Systems written by Stephan Stiglmayr and published by . This book was released on 2004 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Achim Fahrner
Publisher :
ISBN 13 : 9783183758104
Total Pages : 138 pages
Book Rating : 4.7/5 (581 download)
Download or read book On Signal Processing and Coding for Digital Magnetic Storage Systems written by Achim Fahrner and published by . This book was released on 2005 with total page 138 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 :
Publisher :
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.:/5 (659 download)
Download or read book Detection and Decoding for Magnetic Storage Systems written by and published by . This book was released on 2009 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hard-disk storage industry is at a critical time as the current technologies are incapable of achieving densities beyond 500 Gb/in2, which will be reached in a few years. Many radically new storage architectures have been proposed, which along with advanced signal processing algorithms are expected to achieve much higher densities. In this dissertation, various signal processing algorithms are developed to improve the performance of current and next-generation magnetic storage systems. Low-density parity-check (LDPC) error correction codes are known to provide excellent performance in magnetic storage systems and are likely to replace or supplement currently used algebraic codes. Two methods are described to improve their performance in such systems. In the first method, the detector is modified to incorporate auxiliary LDPC parity checks. Using graph theoretical algorithms, a method to incorporate maximum number of such checks for a given complexity is provided. In the second method, a joint detection and decoding algorithm is developed that, unlike all other schemes, operates on the non-binary channel output symbols rather than input bits. Though sub-optimal, it is shown to provide the best known decoding performance for channels with memory more than 1, which are practically the most important. This dissertation also proposes a ternary magnetic recording system from a signal processing perspective. The advantage of this novel scheme is that it is capable of making magnetic transitions with two different but predetermined gradients. By developing optimal signal processing components like receivers, equalizers and detectors for this channel, the equivalence of this system to a two-track/two-head system is determined and its performance is analyzed. Consequently, it is shown that it is preferable to store information using this system, than to store using a binary system with inter-track interference. Finally, this dissertation provides a number of insights into the unique characteristics of heat-assisted magnetic recording (HAMR) and two-dimensional magnetic recording (TDMR) channels. For HAMR channels, the effects of laser spot on transition characteristics and non-linear transition shift are investigated. For TDMR channels, a suitable channel model is developed to investigate the two-dimensional nature of the noise.
Author : Paul Augustine Voois
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.:/5 (387 download)
Download or read book Two-dimensional Signal Processing for Magnetic Storage Systems written by Paul Augustine Voois and published by . This book was released on 1993 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Victor M. Hernandez
Publisher :
ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.:/5 (26 download)
Download or read book A Digital Signal Processing System Developed for the Optimal Use of High Density Magnetic Storage Media written by Victor M. Hernandez and published by . This book was released on 1977 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Zining Wu
Publisher : Springer
ISBN 13 : 9781461545668
Total Pages : 152 pages
Book Rating : 4.5/5 (456 download)
Download or read book Coding and Iterative Detection for Magnetic Recording Channels written by Zining Wu and published by Springer. This book was released on 2011-09-27 with total page 152 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 : Shan X. Wang
Publisher : Elsevier
ISBN 13 : 0080510612
Total Pages : 569 pages
Book Rating : 4.0/5 (85 download)
Download or read book Magnetic Information Storage Technology written by Shan X. Wang and published by Elsevier. This book was released on 1999-05-24 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text explains how hard disk drives operate, how billions of bytes of digital information are stored and accessed, and where the technology is going. In particular, the book emphasizes the most fundamental principles of magnetic information storage, including in-depth knowledge of both magnetics and signal processing methods. Magnetic Information Storage Technology contains many graphic illustrations and an introduction of alternative storage technologies, such as optic disk recording, holographic recording, semiconductor flash memory, and magnetic random access memory. - Provides the fundamentals of magnetic information storage and contrasts it with a comparison of alternative storage technologies - Addresses the subject at the materials, device and system levels - Addresses the needs of the multi-billion-dollar-a year magnetic recording and information storage industry - Emphasizes both theoretical and experimental concepts - Condenses current knowledge on magnetic information storage technology into one self-contained volume - Suitable for undergraduate and graduate students, as well as seasoned researchers, engineers and professionals in data and information storage fields
Author : Anantha Raman Krishnan
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (78 download)
Download or read book Signal Processing for Two-Dimensional Magnetic Recording written by Anantha Raman Krishnan and published by . This book was released on 2011 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: With magnetic storage devices already achieving storage densities of up to 400 Gigabits per square inch (Gb/in2), the state of the art is rapidly approaching theoretical limits (dictated by thermal stability concerns). Hence, there is an eort in the industry to develop alternative magnetic storage technologies. Two-dimensional magnetic recording (TDMR) is one such candidate technology. In contrast to other technologies(e.g. heat-assisted magnetic recording [1], bit-patterned media [2]) which rely on signicant changes being made to the recording medium, TDMR relies on the use of traditional recording media, while relying on signal processing to make improvements in the recording density. Though advantageous due to the fact that no drastic re-engineering of media is required, there are signicant challenges that need to be addressed in order to make TDMR a viable candidate for next-generation recordingsystems. The main challenges involved in TDMR arise due to (i) the small bit-area, along with an aggressive write/read process, which leads to a large amount of noise, and (ii) the two-dimensional nature of the recording process { so far not encountered in today's systems. Thus, a gamut of 2D signal processing algorithms need be developed for the compensation of errors occurring due to the aggressive write/read processes. In this dissertation, we present some of the work done with regard to the signal processing tasks involved in TDMR. In particular, we describe our work on (i) channel modelling, (ii) detection strategies, and (iii) error-correction coding strategies targetted at TDMR.
Author : J.W.M Bergmans
Publisher : Springer Science & Business Media
ISBN 13 : 1475724713
Total Pages : 648 pages
Book Rating : 4.4/5 (757 download)
Download or read book Digital Baseband Transmission and Recording written by J.W.M Bergmans and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital Baseband Transmission and Recording provides an integral, in-depth and up-to-date overview of the signal processing techniques that are at the heart of digital baseband transmission and recording systems. The coverage ranges from fundamentals to applications in such areas as digital subscriber loops and magnetic and optical storage. Much of the material presented here has never before appeared in book form. The main features of Digital Baseband Transmission and Recording include: a survey of digital subscriber lines and digital magnetic and optical storage; a review of fundamental transmission and reception limits; an encyclopedic introduction to baseband modulation codes; development of a rich palette of equalization techniques; a coherent treatment of Viterbi detection and many near-optimum detection schemes; an overview of adaptive reception techniques that encompasses adaptive gain and slope control, adaptive detection, and novel forms of zero-forcing adaptation; an in-depth review of timing recovery and PLLs, with an extensive catalog of timing-recovery schemes. . Featuring around 450 figures, 200 examples, 350 problems and exercises, and 750 references, Digital Baseband Transmission and Recording is an essential reference source to engineers and researchers active in telecommunications and digital recording. It will also be useful for advanced courses in digital communications.
Author : Sharon Aviran
Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.:/5 (734 download)
Download or read book Constrained Coding and Signal Processing for Data Storage Systems written by Sharon Aviran and published by . This book was released on 2006 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constrained codes for digital storage systems are studied. A method for improving signal detection in digital magnetic recording systems is also investigated. The bit stuffing algorithm is a technique for coding constrained sequences by the insertion of bits into an arbitrary data sequence. This approach was previously introduced and applied to the family of $(d, k)$ constraints. Results show that the maximum average rate of the bit stuffing code achieves the Shannon capacity when $k=d+1$ or $k=\infty$, and fails to achieve capacity for all other $(d, k)$ pairs. A modification to the bit stuffing algorithm is proposed that is based on the addition of controlled bit flipping. It is shown that the modified scheme achieves improved average rates over bit stuffing for most $(d, k)$ constraints. All $(d, k)$ constraints for which this scheme produces codes with an average rate equal to the Shannon capacity are determined. A general framework for the construction of $(d, k)$-constrained codes from variable-length source codes is presented. Optimal variable-length codes under the general framework are investigated. The construction of constrained codes from variable-length source codes for encoding unconstrained sequences of independent but biased (as opposed to equiprobable) bits is also considered. It is shown that one can use the Tunstall source coding algorithm to generate optimal codes for a partial class of $(d, k)$ constraints. Bit-stuffing schemes which encode arbitrary inputs into two-dimensional (2-D) constrained arrays are presented. The class of 2-D $(d, \infty)$ constraints as well as the `no isolated bits' constraint are considered. The proposed schemes are based on interleaving biased bits with multiple biases into a 2-D array, while stuffing extra bits when necessary. The performance of the suggested schemes is studied through simulations. A method for joint detection and decoding of coded transmission over magnetic recording channels is considered. The standard framework of turbo equalization is modified to account for the colored noise present in high-density magnetic recording systems. The modified scheme incorporates a noise prediction algorithm, which iteratively and selectively whitens the noise, while utilizing the information produced by the turbo equalization scheme. Simulation results demonstrate the performance improvements obtained by the proposed scheme.
Author : G.C. Hadjipanayis
Publisher : Springer
ISBN 13 : 9781402001185
Total Pages : 497 pages
Book Rating : 4.0/5 (11 download)
Download or read book Magnetic Storage Systems Beyond 2000 written by G.C. Hadjipanayis and published by Springer. This book was released on 2001-12-31 with total page 497 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 : Jaekyun Moon
Publisher : Springer Science & Business Media
ISBN 13 : 1461535646
Total Pages : 170 pages
Book Rating : 4.4/5 (615 download)
Download or read book Sequence Detection for High-Density Storage Channels written by Jaekyun Moon and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic data storage can be viewed as a data communication system. This is not a sUlprising view, considering that data storage is essentially the transfer of data between different times. The past decade has indeed seen rapidly growing interest in applying improved coding and detection techniques to magnetic data storage, a traditional approach to enhance performance of communication channels. Since its inception in the 1930's, the magnetic recording industry has achieved impressive progress in data capacity. This has been made possible mainly by innovations and advances in heads and media design. However, as the demand for higher storage capacity continues in the modem information era, a need arises to explore other possibilities to help meet the ever-growing demand. Advanced coding and detection are one such possibility, providing an efficient, cost-effective means to increase data capacity. In fact, with the advent of modem Ie technology which has enabled real-time implementation of increasingly complex signal processing algorithms, advanced coding and detection are rapidly becoming a major issue in the development of improved data storage products. While there have been remarkable advances in recent years in the areas of both coding and detection for data storage, this book focuses only on data detection, or the processing of readback waveforms to reproduce stored data, in conjunction with the traditional modulation coding method called run length-limited or (d,k) coding.
Author : Cory Samuel Modlin
Publisher :
ISBN 13 :
Total Pages : 228 pages
Book Rating : 4.:/5 (815 download)
Download or read book Modeling, Detection, and Adaptive Signal Processing for Magnetic Disk Recording written by Cory Samuel Modlin and published by . This book was released on 1996 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hazem Zayed
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)
Download or read book Adaptive Signal Processing and Efficient Sequence Detection for Digital Magnetic Recording Channels written by Hazem Zayed and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hamid Reza Shafiee
Publisher :
ISBN 13 :
Total Pages : 240 pages
Book Rating : 4.:/5 (319 download)
Download or read book Signal Processing for High-density Magnetic Recording Channels written by Hamid Reza Shafiee and published by . This book was released on 1994 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles Eric MacDonald
Publisher : Ann Arbor, Mich. : University Microfilms International
ISBN 13 :
Total Pages : 402 pages
Book Rating : 4.:/5 (318 download)
Download or read book High Bit Rate Signal Processing Techniques and Characterization for Digital Storage Systems written by Charles Eric MacDonald and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1995 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
