J
John C. Johnson
Researcher at Motorola
Publications - 8
Citations - 368
John C. Johnson is an academic researcher from Motorola. The author has contributed to research in topics: Filter (signal processing) & Wireless network. The author has an hindex of 5, co-authored 8 publications receiving 368 citations.
Papers
More filters
Patent
Wearable display device, corresponding systems, and method for presenting output on the same
TL;DR: In a wearable electronic device, a flexible housing can be configured to enfold about an appendage of a user, such as a user's wrist, and a display can be disposed along a major face of the flexible housing.
Patent
Power control circuitry for a tdma radio frequency transmitter
TL;DR: In this paper, a TDMA cellular telephone (600) includes power control circuitry (100) comprised of variable gain stage (104), mixer (106), bandpass filter (109), RF amplifier (110), and directional coupler (112), and two detectors (116 and 117), four A/D converters (118, 119, 121 and 123), digital controller (120), and D/A converter (126) in a feedback path.
Patent
Method and apparatus of increasing speech intelligibility in noisy environments
Jianming J. Song,John C. Johnson +1 more
TL;DR: In this paper, a method for enhancing the intelligibility of speech emitted into a noisy environment was proposed, where a set of high pass filter gains were combined with the formant enhancement gain factors yielding combined gains which were clipped (518), scaled (520) according to a total SNR, normalized (526), smoothed across time (530), and frequency (532) and used to reconstruct an audio signal.
Patent
Methods and apparatuses for operating a display in an electronic device
TL;DR: In this paper, a flexible housing can be configured to enfold about an appendage of a user, such as a user's wrist, and a display can be disposed along a major face of the flexible housing.
Patent
Selective Infrared Filtering for Imaging-Based User Authentication and Visible Light Imaging
TL;DR: In this paper, the authors propose a controller to reconfigure the electrochromic filter from the first filter state to the second filter state responsive to a user authentication event, in order to process an image captured by the imaging sensor.