Multitrack detection for shingled magnetic recording
(SMR) using a two-head array system is considered. The
channel suffers from intersymbol interference (ISI) in the downtrack
direction and intertrack interference (ITI) in the crosstrack
direction. We propose a practical multihead/multitrack detector
that provides a low-complexity approach to adaptive estimation of
time-varying ITI. The performance of the proposed detection algorithm
is analyzed in terms of its minimum distance parameter,
and simulation results show that the proposed detector offers a
performance advantage in settings where complexity constraints
limit the maximum-likelihood two-track detector to use a static
ITI estimate.