Lingkai Kong

US Patent:

20130241772, Sep 19, 2013

Filed:

Oct 31, 2011

Appl. No.:

13/988047

Inventors:

Lingkai Kong - Albany CA, US
Farshid Aryanfar - Sunnyvale CA, US

International Classification:

H01Q 3/26

US Classification:

342375, 342368

Abstract:

The disclosed embodiments generally relate to techniques for processing signals received from multiple antennas. More specifically, the disclosed embodiments relate to a system that uses an integrated phase-shifting-and-combining circuit to process signals received from multiple antenna elements. This circuit applies a specified phase shift to the input signals, and combines the phase-shifted input signals to produce an output signal. In some embodiments, the integrated phase-shifting-and-combining circuit uses a current-steering mechanism to perform the phase-shifting-and-combining operations. This current-steering mechanism operates by converting the input signals into associated currents, and then steering each of the associated currents through multiple pathways which have different delays. Next, the currents from the multiple pathways for the associated currents are combined to produce the output signal. During this process, while steering each of the associated currents through multiple pathways to achieve different phase shifts, complementary impedance changes through the multiple pathways cause the aggregate impedance at the output to remain substantially constant.

US Patent:

8593217, Nov 26, 2013

Filed:

Mar 2, 2012

Appl. No.:

13/411446

Inventors:

Lingkai Kong - El Cerrito CA, US

Assignee:

Xilinx, Inc. - San Jose CA

International Classification:

H03K 5/00

US Classification:

327554, 708819

Abstract:

A FIR filter component for a voltage mode driver includes a first node, a second node, and a first switching component comprising a first transistor having a first drain/source, a gate, and a second drain/source, and also a second transistor having a first drain/source, a gate, and a second drain/source. The FIR filter component also includes a first tunable resistor coupled between the first node and a first potential, and a second tunable resistor coupled between the second node and a second potential, wherein the FIR filter component is configured to generate a first output signal at the first output node.

US Patent:

20220206115, Jun 30, 2022

Filed:

Dec 29, 2020

Appl. No.:

17/137224

Inventors:

- Beijing, CN
Lingkai Kong - Palo Alto CA, US
Yue Lu - Mountain View CA, US
John K. Wu - Mountain View CA, US

International Classification:

G01S 7/484
G01S 17/10
G01S 17/931

Abstract:

In one example, an apparatus is provided. The apparatus is part of a Light Detection and Ranging (LiDAR) module and comprises a transmitter circuit, a receiver circuit, and a controller. The receiver circuit comprises a photodetector configured to convert a light signal into a photocurrent signal. The controller is configured to: transmit, using the transmitter circuit, a first light signal; receive, using the photodetector of the receiver circuit, a second light signal; determine whether the second light signal includes a scatter signal coupled from the transmitter circuit, and a reflected first light signal; and based on whether the second light signal includes the scatter signal and the reflected first light signal, determine a time-of-flight of the first light signal based on one of: a width of the second light signal, or a time difference between the transmission of the first light signal and the reception of the second light signal.

US Patent:

20230049679, Feb 16, 2023

Filed:

Aug 4, 2021

Appl. No.:

17/393755

Inventors:

- Beijing, CN
Yonghong Guo - Mountain View CA, US
Wenbin Zhu - Mountain View CA, US
Lingkai Kong - Mountain View CA, US

International Classification:

G01S 7/481
G01S 7/484
G01S 17/931
G01S 7/4911
G01S 7/4863

Abstract:

In some examples, an apparatus is provided. The apparatus comprises: an illuminator having an adjustable field of view (FOV), the FOV being adjusted based on setting a direction of propagation of light to illuminate the FOV; a light detector; and a controller configured to: control the illuminator to project the light along a first direction of propagation to illuminate a first FOV; control the illuminator to project the light along a second direction of propagation to illuminate a second FOV; detect, using the light detector, reflected light received from the first FOV and the second FOV to generate one or more detection outputs for a combined FOV including the first FOV and the second FOV; and perform at least one of a detection operation or a ranging operation of an object in the combined FOV based on the one or more detection outputs.

US Patent:

20230037359, Feb 9, 2023

Filed:

Oct 13, 2022

Appl. No.:

17/965757

Inventors:

- Beijing, CN
Lingkai Kong - Mountain View CA, US
Yonghong Guo - Mountain View CA, US
Wenbin Zhu - Mountain View CA, US

Assignee:

BEIJING VOYAGER TECHNOLOGY CO., LTD. - Beijing

International Classification:

G01S 7/486
G01S 7/481
G01S 7/48

Abstract:

Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes an acousto-optical (AO) beam deflecting unit configured to receive an input laser beam and a controller configured to cause an acoustic signal to be applied to the AO beam deflecting unit to deflect the input laser beam for a deflection angle and form an output laser beam towards a beam sensor. The deflection angle between the input and the output laser beams is nonzero.

US Patent:

20210405167, Dec 30, 2021

Filed:

Sep 11, 2021

Appl. No.:

17/472633

Inventors:

- Beijing, CN
Yue Lu - Mountain View CA, US
Lingkai Kong - Palo Alto CA, US
John Wu - Mountain View CA, US

International Classification:

G01S 7/497
G01S 17/02
G01S 7/487

Abstract:

Embodiments of the disclosure provide a system for analyzing noise data for light detection and ranging (LiDAR). The system includes a communication interface configured to sequentially receive noise data of the LiDAR in time windows, at least one storage device configured to store instructions, and at least one processor configured to execute the instructions to perform operations. Exemplary operations include determining an estimated noise value of a first time window using the noise data received in the first time window and determining an instant noise value of a second time window using the noise data received in the second time window. The second time window is immediately subsequent to the first time window. The operations also include determining an estimated noise value of the second time window by aggregating the estimated noise value of the first time window and the instant noise value of the second time window.

US Patent:

20210389434, Dec 16, 2021

Filed:

Jun 10, 2020

Appl. No.:

16/898430

Inventors:

- Beijing, CN
Lingkai Kong - Mountain View CA, US
Yonghong Guo - Mountain View CA, US
Wenbin Zhu - Mountain View CA, US

Assignee:

BEIJING VOYAGER TECHNOLOGY CO., LTD. - Beijing

International Classification:

G01S 7/487
G01S 7/499
G01S 7/4863

Abstract:

Embodiments of the disclosure provide a receiver in an optical sensing system for receiving a light beam. The receiver includes a first polarizer configured to pass the light beam of a first polarization. The receiver further includes an electro-optical layer coated with patterned transparent electrodes. An electric field is applied to a selected area of the electro-optical layer through the patterned transparent electrodes, and the electro-optical layer changes a portion of the light beam from the first polarization to a second polarization. The receiver also includes a second polarizer configured to selectively pass the portion of the light beam of the second polarization. The receiver additionally includes a detector configured to receive the portion of the light beam output from the second polarizer.

US Patent:

20210382141, Dec 9, 2021

Filed:

Jul 7, 2020

Appl. No.:

16/922465

Inventors:

- Beijing, CN
Lingkai Kong - Mountain View CA, US
Yonghong Guo - Mountain View CA, US
Wenbin Zhu - Mountain View CA, US

Assignee:

BEIJING VOYAGER TECHNOLOGY CO., LTD. - Beijing

International Classification:

G01S 7/481
G02B 26/08
G01S 17/931
G01S 17/89
G01S 7/484

Abstract:

Embodiments of the disclosure provide receivers for light detection and ranging (LiDAR). In an example, a receiver includes a beam reflecting unit having a plurality of digital micromirror devices (DMDs). The beam reflecting unit is configured to receive an input light beam returned from an object being scanned by the LiDAR, reflect a signal in the input light beam by at least one first DMD selectively switched to an “ON” state at an operation angle to form an output signal towards a detector, reflect a noise signal in the input light beam away from the detector by at least one second DMD selectively switched to an “OFF” state at a non-operation angle. The receiver also includes the detector configured to receive the output signal.