DocumentCode :
702554
Title :
Signal processing for two dimensional magnetic recording using Voronoi model averaged statistics
Author :
Mehrnoush, Morteza ; Belzer, Benjamin J. ; Sivakumar, Krishnamoorthy ; Wood, Roger
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Washington State Univ., Pullman, WA, USA
fYear :
2015
fDate :
18-20 March 2015
Firstpage :
1
Lastpage :
6
Abstract :
This paper considers a signal processing system for two-dimensional magnetic recording (TDMR) employing a random Voronoi grain model. The channel model also includes two-dimensional intersymbol interference (2D-ISI) and additive white Gaussian noise. The system uses a 2D-ISI BCJR detector and irregular repeat-accumulate (IRA) code decoder in a turbo-equalization approach. In order to transfer soft information to the IRA decoder a mapping function based on the 2D-ISI detector soft information statistics is used. Simulations employing the perturbed-bit-centers Voronoi grain model proposed in a previous paper by Hwang et al. show that the proposed system achieves a 6.5% increase in user bits/grain (U/G) and an 11.7 dB SNR gain compared to Hwang et al. Simulation results also indicate that our random Voronoi model is harder to equalize than the Hwang Voronoi model. For the random Voronoi model considered in this paper, the proposed system achieves a density of 0.4422 U/G, corresponding to an areal density of about 8.8 Terabits/in2 on typical magnetic hard disks; this is nearly an order of magnitude better than the best commercially available systems.
Keywords :
AWGN channels; computational geometry; intersymbol interference; magnetic recording; signal processing; statistical analysis; turbo codes; IRA decoder; Voronoi model averaged statistics; additive white Gaussian noise; channel model; irregular repeat-accumulate code decoder; perturbed-bit-centers Voronoi grain model; signal processing; turbo-equalization approach; two dimensional magnetic recording; two-dimensional intersymbol interference; Bit error rate; Decoding; Detectors; Equalizers; Magnetic recording; Magnetic resonance imaging; Signal to noise ratio; Two dimensional magnetic recording; Voronoi model; turbo-equalization; two-dimensional intersymbol interference;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Sciences and Systems (CISS), 2015 49th Annual Conference on
Conference_Location :
Baltimore, MD
Type :
conf
DOI :
10.1109/CISS.2015.7086819
Filename :
7086819
Link To Document :
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