Yu Zhang

US Patent:

20220368388, Nov 17, 2022

Filed:

Mar 4, 2022

Appl. No.:

17/653641

Inventors:

- St. Michael, BB
Yu Zhang - Thousand Oaks CA, US
Shuimei Zhang - Oak Park CA, US
Xin Zhang - Agoura Hills CA, US

International Classification:

H04B 7/0456
H04B 17/11
H04B 17/21

Abstract:

This document describes techniques and systems for independent transmit and receive channel calibration for multiple-input multiple-output (MIMO) systems. Antenna responses are collected from each virtual channel of a MIMO system at an angle respective to an object. The transmit components and the receive components of the virtual channels are separated and organized into vectors (one for the transmit components and one for the receive components). Calibration values for elements of the vectors are computed and maintained in a transmit calibration matrix and a receive calibration matrix, respectively. Together, the transmit calibration matrix and the receive calibration matrix may include fewer elements than a calibration matrix for the virtual channels and, therefore, may require less memory and fewer computations to calibrate a MIMO system than using other calibration techniques. As such, described is a less expensive and less complex way to calibrate MIMO system by accurately approximating an ideal antenna array.

US Patent:

20220309758, Sep 29, 2022

Filed:

Mar 29, 2021

Appl. No.:

17/215418

Inventors:

Yu Zhang - Monterey Park CA, US

International Classification:

G06T 19/20
G06T 13/20
G06F 3/14

Abstract:

A transparent display device that can be mounted to existing computer cases with a window. Once the device is connected, software guides users to align the inside edges of their case to create a 3D effect inside the case. The software allows users to add their custom components so that the 3D effects can interact with those components. An example would be animated waves will appear to splash against a graphics card instead of moving through it. The software will also have a store allowing users to find and download additional animation, 3D effects, music visualizers, and customize their machine by combining all these elements.

US Patent:

20220260672, Aug 18, 2022

Filed:

Apr 27, 2021

Appl. No.:

17/242175

Inventors:

- St. Michael, BB
Zhengzheng Li - Agoura Hills CA, US
Yu Zhang - Thousand Oaks CA, US

International Classification:

G01S 7/02
G01S 13/58
G01S 13/931

Abstract:

The disclosure provides systems, apparatuses, and techniques for operating automotive MIMO radars in crowded multi-path environments to obtain reliable detections by linearly predicting whether a bistatic condition occurred. To avoid saturating computing resources processing bistatic detections, the described techniques enable a radar system to quickly identify and discard from the field-of-view radar detections that are likely a result of bistatic conditions. By ignoring unusable radar returns that are likely a result of bistatic conditions, an example radar system can focus on processing radar returns from static conditions, for example, in providing radar-based detections as output to an automotive system that is driving a vehicle in an autonomous or a semi-autonomous mode. In so doing, the example radar system provides a highly accurate static object detector that is sufficiently quick in detecting bistatic conditions for use in vehicle-safety systems as well as autonomous and semi-autonomous control.

US Patent:

20220236370, Jul 28, 2022

Filed:

Apr 21, 2021

Appl. No.:

17/236893

Inventors:

- St. Michael, BB
Xin Zhang - Agoura Hills CA, US
Yu Zhang - Thousand Oaks CA, US

International Classification:

G01S 7/03
G01S 13/42
H01Q 21/08
H01Q 21/06
H01Q 1/32

Abstract:

This document describes techniques and systems of a radar system with paired one-dimensional (1D) and two-dimensional (2D) antenna arrays. Even with fewer antenna elements than a traditional radar system, the paired arrays enable an example radar system to have a comparable angular resolution at a lower cost. For example, the 1D array includes antenna elements positioned in a first direction (e.g., azimuth direction) and spaced by a first distance and a second distance. The 2D array includes at least four other antenna elements positioned in the first direction and a second direction (e.g., elevation direction). The other antenna elements are spaced by a third distance in the second direction and by the sum of the first direction and the second direction in the first direction. A processor can associate, using shared angle estimates, angles in the first direction and the second direction for respective objects.

US Patent:

20230018183, Jan 19, 2023

Filed:

Oct 15, 2021

Appl. No.:

17/503212

Inventors:

- St. Michael, BB
Yu Zhang - Thousand Oaks CA, US
Edgar Ortiz - Newbury Park CA, US
Clinton Colby - Santa Rosa Valley CA, US

International Classification:

G01S 13/90
G06T 5/00
G06T 5/20
B60W 50/06

Abstract:

This document describes techniques for enabling de-aliased imaging for a synthetic aperture radar. Radar signals processed by a synthetic aperture radar (SAR) system may include false detections in the form of aliasing induced by grating lobes. The techniques described herein can reduce the adverse effects of grating lobes by obtaining an initial SAR image using a back-projection algorithm. Aliasing effects (e.g., false detections) in this initial image may be common due to the limitations of an SAR system moving at non-uniform speeds. A refined image is produced from the initial image by applying a de-aliasing filter to the initial image. The refined image may have reduced or eliminated false detections that attribute to aliasing effects, resulting in a better representation of the environment of the vehicle.

US Patent:

20210247507, Aug 12, 2021

Filed:

Feb 12, 2020

Appl. No.:

16/788394

Inventors:

- St. Michael, BB
Yu Zhang - Thousand Oaks CA, US
Xin Zhang - Calabasas CA, US

International Classification:

G01S 13/32
G01S 7/35

Abstract:

A two-step optimization method for scheduling transmissions in an MIMO (multi-input multi-output) includes determining a first phase code for each transmission according to a first equation, placing each first phase code in a set of first phase codes, and determining a cost function of the set of first phase codes, determining a second phase code for each transmission according to a second equation, determining an updated cost function corresponding to replacing each of the first phase codes with a corresponding one of the second phase codes, and determining which set of phase codes has a smaller cost function.

US Patent:

20140279741, Sep 18, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/840763

Inventors:

INTERNATIONAL BUSINESS MACHINES CORPORATION - , US
Deepak S. Turaga - Hawthorne NY, US
Yu Zhang - Los Angeles CA, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - ARMONK NY

International Classification:

G06N 99/00

US Classification:

706 12

Abstract:

A method of meta-learning includes receiving a prediction objective, extracting a plurality of subsets of data from a distributed dataset, generating a plurality of local predictions, wherein each local prediction is based on a different subset of the plurality of subsets of data and the prediction objective, combining the plurality of local predictions, and generating a final prediction based on the combined local predictions.