IPTeL Tracking ID: ES-DESE-2016-098
The invention relates to method of time recovery in communication system, particularly using hardware for two-dimensional magnetic recording systems.
BACKGROUND
To sustain continued growth in the capacity of hard disk drives, significant efforts have been put on storage techniques like Heat-Assisted Magnetic Recording (HAMR) and Bit-Patterned media (BPM). The major drawbacks of these techniques lie in the need for radical changes to
conventional media. The two-dimensional magnetic recording (TDMR) scheme is an exciting new option for ultra-high storage densities. But, TDMR channels come with a price of 2-D Inter Symbol Interference (ISI) and noise. Therefore, signal processing becomes significantly
more complex in comparison to that of traditional 1-D recording. This calls for novel multidimensional signal processing techniques for each of the corresponding processes associated with 1-D storage channels. Timing recovery is one such necessary process in TDMR systems.
While several states of the art solutions exist for 1-D magnetic recording systems, no such solutions are available for the TDMR paradigm.
TECHNOLOGY
The present invention provides a reliable and efficient apparatus and method for enhancing read performance in a two-dimensional magnetic recording system (TDMR). It proposes a complete digital implementation of a time recovery scheme based on an interpolation filter approach. The invention also demonstrates a hardware prototype which is believed to be first architectural solution to time recovery problem in TDMR systems.