Yujie X Zhang

US Patent:

20080032650, Feb 7, 2008

Filed:

Jun 8, 2007

Appl. No.:

11/760454

Inventors:

Yujie Zhang - Gardena CA, US
Charles Morton - Redondo beach CA, US

International Classification:

H04B 1/18

US Classification:

455185100

Abstract:

“xrBlue” adapter is a integrated Bluetooth-FM adapter that plugs into a car cigarette lighter socket, enabling in-car cable-free hands-free Bluetooth for every kind of Bluetooth-enabled devices including cell phone, MP3 player, iPod, navigation system etc. The “xrBlue” adapter comprises of five components: Bluetooth module to automatically detect and establish communication with the Bluetooth enabled apparatus; FM module for configuring to tune to the car radio FM channel and play via the car stereo system; power module to plug-in the car cigarette lighter socket; optional power plug-in extension socket to provide the power pass-through for additional electronic device; optional retractable wired microphone or Bluetooth microphone. The “xrBlue” adapter differentiates from previous art in that: this unique integrated Bluetooth-FM design synergy communication, entertainment, and navigation into all-in-one Bluetooth solution; this device does not rely on out-of-date cassette tape player and is ready to use by simply starting the car with the device inserted into the car cigarette lighter socket; there is no worry of battery life since it is directly plug-in the cigarette lighter socket for constant supply of power.

US Patent:

20170269222, Sep 21, 2017

Filed:

Sep 6, 2016

Appl. No.:

15/257092

Inventors:

- Moline IL, US
Sonia U. Kuntz - Redondo Beach CA, US
Yujie Zhang - Torrance CA, US
Yiqun Chen - Torrance CA, US

International Classification:

G01S 19/41
G01S 19/07
G01S 19/44

Abstract:

A wide-lane ambiguity and a respective satellite wide-lane bias are determined for the collected phase measurements for each satellite for assistance in narrow-lane ambiguity resolution. Satellite correction data is determined for each satellite in an orbit solution based on the collected raw phase and code measurements and determined orbital narrow-lane ambiguity and respective orbital satellite narrow-lane bias. A slow satellite clock correction is determined based on the satellite orbital correction data, the collected raw phase and code measurements, and clock narrow-lane ambiguity and respective satellite narrow-lane bias. A low latency clock module or data processor determines lower-latency satellite clock correction data or delta clock adjustment to the slow satellite clock based on freshly or recently updated measurements of the collected raw phase measurements that are more current than a plurality of previous measurements of the collected raw phase measurements used for the slow satellite clock correction to provide lower-latency clock correction data.

US Patent:

20170269225, Sep 21, 2017

Filed:

Mar 2, 2017

Appl. No.:

15/448474

Inventors:

- Moline IL, US
Yiqun Chen - Torrance CA, US
Yujie Zhang - Torrance CA, US

International Classification:

G01S 19/41
G01S 19/32
G01S 19/44
G01S 19/07

Abstract:

A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines wide-lane navigation solutions for the plurality of reference receivers. The system also determines clusters of single-difference (SD) wide-lane floating ambiguities. A satellite wide-lane bias value for each satellite of a plurality of satellites is initially determined in accordance with fractional portions of the SD wide-lane floating ambiguities in the clusters and over-range adjustment criteria. A set of navigation satellite corrections for each satellite, including the satellite wide-lane bias value for each satellite, is generated and transmitted to navigation receivers for use in determining locations of the navigation receivers.

US Patent:

20170269226, Sep 21, 2017

Filed:

Mar 2, 2017

Appl. No.:

15/448481

Inventors:

- Moline IL, US
Sonia Kuntz - Torrance CA, US
Yiqun Chen - Torrance CA, US
Yujie Zhang - Torrance CA, US

International Classification:

G01S 19/41
G01S 19/07
G01S 19/32

Abstract:

A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines narrow-lane navigation solutions for the plurality of reference receivers. The system also determines, in accordance with the narrow-lane navigation solutions, at a first update rate, an orbit correction for each satellite of a plurality of satellites; at a second update rate, a clock correction for each such satellite; and at a third update rate that is faster than the second update rate, an update to the clock correction for each such satellite. Further, the system generates navigation satellite corrections for each such satellite, including the orbit correction updated at the first update rate, and the clock correction that is updated at the third update rate.

US Patent:

20170269227, Sep 21, 2017

Filed:

Sep 26, 2016

Appl. No.:

15/276387

Inventors:

- Moline IL, US
Yujie Zhang - Torrance CA, US

International Classification:

G01S 19/44
G01S 19/30
G01S 19/29

Abstract:

Example methods disclosed herein include accessing carrier phase measurements and code measurements obtained for a plurality of satellite signals of a global navigation satellite system. Disclosed example methods also include determining an initial set of floating-point ambiguities based on the measurements, the initial set of floating-point ambiguities including inter-frequency bias (IFB). Disclosed example methods further include performing a least squares search process based on the initial set of floating-point ambiguities to determine a set of integer ambiguities and an estimate of the IFB. In some examples, an additional (e.g., wide-lane) filter is used to realize a combination of carrier phase and code IFB. In some examples, IFB estimation is further realized by determining a median of IFB estimates over a window time. In some examples, the resulting IFB estimate and the set of integer ambiguities are used to estimate a position of a receiver, determine a satellite correction signal, etc.