Western Digital Technologies Assigned Two Patents

Data storage device demodulating servo stripes using matched filter
Western Digital Technologies, Inc., San Jose, CA, has been assigned a patent (11488626) developed by Yamamoto, Satoshi, San Jose, CA, Burton, Derrick E., Ladera Ranch, CA, and Kobayashi, Masahito, Ibaraki, Japan, for a “data storage device demodulating servo stripes using matched filter.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A data storage device is disclosed comprising at least one head configured to access a magnetic tape comprising a plurality of servo frames each comprising an A servo burst, a B servo burst, a C servo burst, and a D servo burst. The A servo burst in a first servo frame is read using the head to generate a first read signal which is sampled to generate first signal samples. A first matched filter matched to the A servo burst filters the first signal samples to generate first filtered samples within a first burst window, and the first burst window is updated based on the first filtered samples. The first filtered samples within the first burst window are processed to generate a position error signal (PES), and a position of the head is controlled relative to the magnetic tape based on the PES.”

The patent application was filed on 2021-07-28 (17/387609).

Storage device demodulating servo stripes using matched filter
Western Digital Technologies, Inc., San Jose, CA, has been assigned a patent (11488625) developed by Yamamoto, Satoshi, San Jose, CA, Burton, Derrick E., Ladera Ranch, CA, and Kobayashi, Masahito, Ibaraki, Japan, for a “data storage device demodulating servo stripes using matched filter.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A data storage device is disclosed comprising at least one head configured to access a magnetic tape comprising a plurality of servo frames each comprising a plurality of servo bursts. A first servo burst is read using the head to generate a read signal which is sampled to generate signal samples. A first matched filter matched to the first servo burst is used to generate filtered samples in response to the signal samples, and at least part of the filtered samples are interpolated to generate interpolated samples. The interpolated samples are processed to generate a position error signal (PES), and a position of the head relative to the magnetic tape is controlled based on the PES.”

The patent application was filed on 2021-07-28 (17/387563).