TY - GEN
T1 - Timing recovery for two-dimensional modulation codes
AU - Ma, Alan K.
AU - Marcellin, Michael W.
N1 - Funding Information: *This work was supported by InternationalB usiness Machines Cor- poration, The University of Arizona Foundation, and The University of Arizona Office of the Vice President for Research. Publisher Copyright: © 1992 IEEE.
PY - 1992
Y1 - 1992
N2 - Two-dimensional modulation codes were recently introduced as a method to increase data storage densities. These codes are a generalization of the usual run-length-limited (d, k) codes and provide for increased storage density by relaxing the k-constraint and encoding multiple tracks in parallel. The use of these codes requires that timing information be derived from multiple tracks read in parallel. This paper introduces a timing recovery circuit for use by systems that employ two dimensional modulation codes. The circuit generalizes the familiar square-and-filter approach. Computer simulations are used to determine the performance of this circuit in terms of peak-to-peak jitter vs. signal to noise ratio at various pulse densities. Another circuit introduced in this paper is used to remove relative time-shift from adjacent tracks. This circuit is necessary for proper operation of the timing recovery circuit in systems with removable media.
AB - Two-dimensional modulation codes were recently introduced as a method to increase data storage densities. These codes are a generalization of the usual run-length-limited (d, k) codes and provide for increased storage density by relaxing the k-constraint and encoding multiple tracks in parallel. The use of these codes requires that timing information be derived from multiple tracks read in parallel. This paper introduces a timing recovery circuit for use by systems that employ two dimensional modulation codes. The circuit generalizes the familiar square-and-filter approach. Computer simulations are used to determine the performance of this circuit in terms of peak-to-peak jitter vs. signal to noise ratio at various pulse densities. Another circuit introduced in this paper is used to remove relative time-shift from adjacent tracks. This circuit is necessary for proper operation of the timing recovery circuit in systems with removable media.
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U2 - 10.1109/ICC.1992.268105
DO - 10.1109/ICC.1992.268105
M3 - Conference contribution
T3 - IEEE International Conference on Communications
SP - 1361
EP - 1365
BT - 1992 International Conference on Communications
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1992 IEEE International Conference on Communications: Discovering a New World of Communications, SUPERCOMM/ICC 1992
Y2 - 14 June 1992 through 18 June 1992
ER -