Title :
Experimental performance comparison of FDTS/DF detectors: 8/9 (0,k) vs. 4/5 MTR codes
Author :
Keirn, Zachary A. ; McCarthy, Steven G.
Author_Institution :
Maxtor Corp., Longmont, CO, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
The performance of an FDTS/DF detector is compared using two different RLL coding techniques. The new Maximum Transition Run (MTR) codes have been proposed for use with FDTS/DF detectors because of demonstrated coding gains. This work compares the performance of an 8/9 (0,4/4) code to a 4/5 MTR code using actual MR head signals captured from a spinstand. The coding gain is evaluated in the presence of real write process non-linearity that exists at high linear densities. The error rate performance is compared at User Bit Densities (UBD) ranging from 2.2 to 2.9. A technique similar to Sequenced Amplitude Margin is used to assess error rate performance for the FDTS/DF detector. Final results are also compared to PR4 and RAM-DFE detectors
Keywords :
coding errors; decision feedback equalisers; magnetic heads; magnetic recording; magnetoresistive devices; maximum likelihood detection; runlength codes; 4/5 MTR codes; 8/9 (0,4/4) code; 8/9 (0,k) code; FDTS/DF detectors; MR head signals; PR4 detectors; RAM-DFE detectors; RLL coding techniques; coding gains; error rate performance; fixed delay tree search with decision feedback; high linear densities; magnetoresistive head; maximum transition run codes; nonlinear transition shift; sequenced amplitude margin; spinstand; user bit densities; write process nonlinearity; Convolutional codes; Delay; Detectors; Error analysis; Feedback; Magnetic heads; Magnetic recording; Magnetic separation; Maximum likelihood detection; Oscilloscopes;
Journal_Title :
Magnetics, IEEE Transactions on
