A study of SNR and BER in Heat Assisted Magnetic Recording (HAMR)

Y. Jiao, Y. Wang, R. H. Victora

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

As Perpendicular Magnetic Recording (PMR) technology reaches its areal density limit, Heat-Assisted Magnetic Recording (HAMR) [1] becomes one of the most promising candidates for the next generation recording technology that could allow continued areal density growth up to 4 Tb/in2. However, as the areal density increases, it will bring many challenges to the recording system, such as increased non-linear bit shift and transition noise, and could lower the SNR. In this work, we focused on the factors that could affect the signal-to-noise ratio (SNR) and hence bit error rate (BER) of the HAMR system: we try to determine which one is more important. We then studied SNR vs BER by processing the readback signal with a 1D minimum mean square error (MMSE) equalizer and an improved Viterbi detector[2][3].

Original languageEnglish (US)
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479973224
DOIs
StatePublished - Jul 14 2015
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: May 11 2015May 15 2015

Publication series

Name2015 IEEE International Magnetics Conference, INTERMAG 2015

Other

Other2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period5/11/155/15/15

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