Wherenet Corporation

Zebra Enterprise Solutions Corp.

Douglas C Bowman

Ronald J Hash

John Alan Eisenberg

Huong M Hang

Patrick Steven Piemonte

Donald K Belcher

Wolf Kienzle

Shaun D Budhram

Daniel De Rocha Rosario

Vyacheslav Leizerovich

Madhurani R Sapre

Implementations described and claimed herein provide systems and methods for interaction between a user and a machine. In one implementation, a system is provided that receives an input from a user of a mobile machine which indicates or describes an object in the world. In one example, the user may gesture to the object which is detected by a visual sensor. In another example, the user may verbally describe the object which is detected by an audio sensor. The system receiving the input may then determine which object near the location of the user that the user is indicating. Such a determination may include utilizing known objects near the geographic location of the user or the autonomous or mobile machine.

Systems and methods for relative representation of spatial objects and disambiguation in an interface

A communications system, such as part of a real-time location system, includes a transmitter that can be part of a location processor, tag emission reader or tag interrogator that generates a frequency shift key (FSK) modulated wireless communication signal representative of digital data and transmits the communications signal over a wireless communications channel. A receiver such as incorporated within a tag transceiver used in the real-time location system receives the FSK modulated communication signal. The receiver includes a circuit for calculating the magnitude of low and high tones of the FSK modulated communication signal and a threshold for amplitude shift keyed (ASK) channel data and FSK channel data to derive the digital data even in the presence of on-tone jammers in the communications channel.

Receiver for object locating and tracking systems and related methods

The unwanted influence a noise-source environment upon a modulated (e.g., FSK-encoded) magnetic field-based communication system is diminished by a non-modulated AC magnetic field communication scheme that uses a demodulatorless magnetic field detector. When installed in a tag to be tracked by a geolocation system, the demodulatorless detector responds when the tag comes within a prescribed proximity of the field generator producing the non-modulated AC magnetic field. The received signal is downconverted to baseband and processed to detect a valid AC magnetic field tone and indicate whether the tag is within a prescribed proximity of the AC magnetic field source.

Ultra-sensitive magnetic field receiver capable of operating in high noise environments

A communication system provides robust, short range radio communications between battery operated devices by using ON-OFF-KEYED (OOK) modulation and either frequency shift keyed (FSK) modulation or pulse position/width modulation (PPM/PWM), in combination with a prescribed communications protocol. The system transmitter requires no local oscillator and is only active during actual communication, so that its current drain is not a significant factor in total battery life. Also, the receiver is active for only a small fraction of time. The need for large, complex and expensive filters is minimized by using a single IF band-pass filter in active form or passively in the form of a low cost ceramic filter such as those used in inexpensive transistor radios. The digital transmitter and receiver portions of the system are implemented by low cost, and ultra low power CMOS logic.

Combined OOK-FSK/PPM modulation and communication protocol scheme providing low cost, low power consumption short range radio link

A non-propagating magnetic field-based communication system transmits and receives digital data within a limited coverage area environment. The system includes a compact transmitter unit, such as that contained in an 'tracking' tag affixed to an object, and a digital detector/demodulator unit. In order to generate and FSK-modulate a non-propagating magnetic field in accordance with modulation signals representative of the digital data, the transmitter unit contains a magnetic field coil and one or more capacitors controllably switched in circuit with the coil in accordance with the data, so as to change the resonant frequency of an inductor-capacitor transmitter resonant circuit. The receiver unit includes a magnetic field-sensing coil in circuit with a capacitor, to form a receiver resonant circuit that resonates at a frequency between the FSK frequencies modulated by the transmitter unit. A digital receiver/demodulator detects whether received frequencies are valid FSK frequencies and derives digital data using differences between valid detected FSK frequencies.

Growing community of inventors

Capitola, CA, United States of America

Douglas C Bowman