Channel Capacity and Coding for Magnetic Recording Channels with Media Noise

دانشگاه آزاد اسلامی اصفهان(خوراسگان)

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" Channel Capacity and Coding for Magnetic Recording Channels with Media Noise "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	151584
Doc. No	:	ET23376
Main Entry	:	Travis Roger Oenning
Title Proper	:	Channel Capacity and Coding for Magnetic Recording Channels with Media Noise
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	A major noise component in high-density digital magnetic recording channels is data-dependent medium noise. A model for the digital magnetic recording channel that incorporatesdatadependent noise is presented. The model allows for convenient simulation and analysis incomparing various signal processing and coding strategies while still fairly accurately reflectingthe actual channel and maintaining a relationship with physical parameters of the channel.Due to their recently shown remarkable performance, iterative decoding of turbo and low-density parity-check (LDPC) codes are receiving considerable attention. The application of LDPCcodes to the magnetic recording channel is considered in detail here. Results show that because ofa more severe code rate penalty in the magnetic recording channel the coding gain of LDPCcodes is not as large as that which has been seen for other communication channels. It is shown,however, that rather remarkable coding gains an possible in the presence of data-dependenttransition noise, especially when used in conjunction with an appropriately optimized detector.Compared with most other communication channels, data storage channels require anexceptionally high level of reliability; an issue that must be addressed when considering alternatedetection and coding strategies. In fact, error characterization results using sector.....-....,....-...,..tested for theQ1 PC1 bus cardBoth these projects mere sofixare des elopment efforts tonards contributing to dlfferentaspects of Roboucs and lZ1echatronics projects m the Controls and Roboucs Group..
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL46615.pdf
Title and statement of responsibility and	:	Channel Capacity and Coding for Magnetic Recording Channels with Media Noise [Thesis]