Martin Martin Junkar

US Patent:

7253767, Aug 7, 2007

Filed:

Sep 1, 2005

Appl. No.:

11/217693

Inventors:

Martin Junkar - San Mateo CA, US

International Classification:

G01S 1/00
H03L 1/00

US Classification:

34235702, 331175

Abstract:

A GPS receiver comprises a crystal oscillator with a manufacturer's characteristic curve, a GPS radio, a TCO temperature sensor, and a GPS receiver software. The crystal oscillator serves as a local reference oscillator for the GPS radio. The GPS receiver software instructs the GPS radio to search radio spectrum for GPS satellite transmissions. Once the combination locks onto a minimum number of GPS satellites and produces a user position fix, the precise crystal oscillator frequency can be measured and associated with a temperature reading from the TCO to software-compensate the local oscillator in later cold-start frequency searches. A “flat” SCXO model is piecemeal upgraded with individual calibrations as they are collected over the life of the GPS receiver. During manufacturing of the GPS receiver such flat-SCXO model begins as a device characteristic curve supplied by the crystal manufacturer.

US Patent:

20030158663, Aug 21, 2003

Filed:

Feb 19, 2002

Appl. No.:

10/079252

Inventors:

Christopher Rypinski - San Francisco CA, US
Martin Junkar - San Mateo CA, US

International Classification:

G01C021/00

US Classification:

701/213000, 342/357060

Abstract:

A reference station system comprises a plurality of GPS reference stations that are distributed in different parts of the world to be able to simultaneously gather a complete set of satellite vehicle ephemeredes. Each reference station is associated with a network server connected to the Internet. Each network server posts ephemeredes, NAV-data, and other useful information for clients derived from its corresponding reference station. All such network servers inject their information in all the other servers in the system Each server validates and authenticates any injected data. Each client is also qualified as a subscriber before being able to access the complete ephemeredes database and other GPS system information.

US Patent:

20150089176, Mar 26, 2015

Filed:

Sep 26, 2013

Appl. No.:

14/037648

Inventors:

Martin Junkar - San Jose CA, US
Jun Su - San Jose CA, US
Minnie Ho - Los Altos CA, US
Mathew Bevilacqua - Santa Clara CA, US

International Classification:

G06F 5/10
G06F 12/08

US Classification:

711165

Abstract:

In one embodiment an controller comprises logic, at least partially including hardware logic, configured to logic, at least partially including hardware logic, configured to receive location data from a location measurement apparatus, buffer the location data in a local memory, and release the location data from the local memory to a remote processor in response to one or more trigger conditions. Other embodiments may be described.

US Patent:

20150045064, Feb 12, 2015

Filed:

Dec 28, 2012

Appl. No.:

13/976237

Inventors:

Martin Junkar - Santa Clara CA, US
Jun Su - San Jose CA, US
Minnie Ho - Los Altos CA, US
Ke Ding - Shanghai, CN

International Classification:

H04W 4/02

US Classification:

4554563

Abstract:

In one embodiment a controller comprises logic configured to receive, in the controller, a geofencing definition and input from at least one location information device, update a location of the controller using one or more location parameters from one or more location information devices, and generate a notification signal when the location of the controller indicates that the controller has crossed a threshold. Other embodiments may be described.

US Patent:

20140269193, Sep 18, 2014

Filed:

Mar 13, 2013

Appl. No.:

13/801304

Inventors:

Martin JUNKAR - San Jose CA, US
Lei YANG - Hillsboro OR, US
Xue YANG - Arcadia CA, US

International Classification:

G01S 15/06

US Classification:

367 99

Abstract:

Wireless location identification systems, methods, and devices include a wireless device configured to transmit at least one sonic signal operating on at least one acoustic frequency and to receive at least one echo signal indicative of the at least one sonic signal being reflected by objects in a current location, an audio module configured to measure the received at least one echo signal and process the at least one echo signal to extract attributes of the echo signal and generate at least one echo profile characteristic; and logic configured to compare the at least one profile characteristic with previously-stored sonic characteristics that are correlated with pre-identified locations. The current location is then identified as a pre-identified location correlated to the previously-stored sonic characteristics that match the at least one profile characteristic.

US Patent:

20140249771, Sep 4, 2014

Filed:

Mar 1, 2013

Appl. No.:

13/782472

Inventors:

XUE YANG - Arcadia CA, US
LEI YANG - Hillsboro OR, US
MARTIN JUNKAR - San Jose CA, US
UTTAM K. SENGUPTA - Portland OR, US

International Classification:

G01B 7/00

US Classification:

702150

Abstract:

The present disclosure relates to computer-implemented systems and methods for location estimation using a mobile device. An example method may include receiving, at a device, one or more signature measurements associated with an indoor environment. Additionally, the device may be associated with a user. The method may also include receiving, at the device, one or more motion tracking measurements to measure relative motion associated with the device and the user. Furthermore, the method may include associating the one or more signature measurements with one or more virtual landmarks identified within the indoor environment. The method may further include determining a location of the user based on the one or more signature measurements, the one or more motion tracking measurements, and the one or more virtual landmarks.