Effect of Bandpass Filters for TA Suppression in Perpendicular Recording System
| Paper File | Download Paper File | | Appear In | ECTI Transaction EEC (ECTI Transaction EEC) | | Publication Date | 01/02/2010 - 28/02/2010 | | Volume | 8 | | Pages | 93 - 98 | | No | 1 | | Author 1 | Santi Koonkarnkhai | | Author 2 | Piya Kovintavewat | | Author 3 | Phongsak Keeratiwintakorn |
Abstract
Thermal asperities (TAs) cause a crucial problem
in magnetic recording systems because they can dis-
tort the readback signal to the extent of causing pos-
sible sector read failure. This problem becomes even
more severe in perpendicular recording channels be-
cause these channels contain a d.c. component. This
paper presents a novel TA suppression method by use
of a bandpass ¯lter to mitigate the TA e®ect. We also
investigate the e®ect of di®erent bandpass ¯lters for
TA suppression. Results indicate that the proposed
TA suppression method using a bandpass ¯lter poly-
nomial G(D) = (1+D)2(1¡D) yields lower bit-error
rate than the existing ones at the expense of increased
complexity, and is also robust to large peak TA am-
plitudes. |
