Baidu USA LLC

Future Wei Technologies, Inc.

Baidu.com Times Technology (Beijing) Co. Ltd.

Sap Ag

Huawei Technologies Co., Limited

Altera Corporation

Yan Cui

Tianyi Gao

Ali Heydari

Yu Sheng Bai

Charles J Ingalz

Zhiping Jiang

Yangjing Wen

Lenin K Subramanian

Jian Zhong

Quanwei Liu

Shuxian Chen

Fei Zhu

YuSheng Bai

Zhong Zhang

Yue Fang

Weiyu Wendy Lu

Qing Guo

Zhuo Yao

Xiaogang Sun

Narendra Penagulur

Eric Mahendra Kumar

Wei-Ren Peng

Manasa Sahini

Jeffrey T Watt

Xiao Andy Shen

Shuai Shao

Albert Ratnakumar

Hu Tang

Pavan Bayyapu

Zhihong Li

Zhiming Luo

Tianyu Zhou

Clarence Kan

Murali Krishnan

Narinder Singh

Queennie Suan Imm Lim

An Li

Xianguang Tan

Yanjun Zhu

Rowell Sotto

Anisha Dadhia

Yao Zhuo

Wei-ren Peng

An optical receiver that includes an input port configured to receive intensity modulated optical signal with multipath interference (MPI); a detector configured to convert the intensity modulated optical signal with multipath interference to an electrical signal; a high pass filter (HPF) configured to filter the electrical signal and suppress carrier-carrier beat noise induced by the MPI to produce a filtered electrical signal; and an output port configured to transmit the filtered electrical signal.

Apparatus and methods for mitigating multipath interference in fiber transmission system

An apparatus and method for transmitting information bits via an optical communication system, the apparatus including a distribution matcher (DM) configured to receive information bits and to generate shaped symbols relating to the information bits; a pre-deinterleaver (PDI) coupled to the DM and configured to apply a perturbation function q(n) to the shaped symbols to produce pre-deinterleaved symbols; an error reduction processor (ERP) coupled to the PDI and configured to receive computer instructions which, when executed, prompt the ERP to produce error reduction symbols from the pre-deinterleaved symbols, the error reduction symbols being perturbed from the pre-deinterleaved symbols by a perturbation function p(n), q(n) being an inverse of p(n); and a modulator coupled to the ERP and configured to convert the error reduction symbols into optical signals configured for transmission via an optical communication system.

Super-symbol signaling in optical communication systems

In one embodiment, a method for synchronizing sensor data of an autonomous driving vehicle includes determining, by a processing device of an inertial navigation system (INS), that global navigation satellite system (GNSS) data is unavailable and identifying an alternative source of time information. The method further includes retrieving time information from the alternative source and synchronizing sensor data with the time information from the alternative source of time information.

Time determination of an inertial navigation system in autonomous driving systems

In one embodiment, a method for calculating a location of an autonomous driving vehicle includes receiving new global navigation satellite system (GNSS) data. The method further includes identifying a first previously estimated location from a plurality of previously estimated locations with a timestamp that is closest to the timestamp of the new GNSS data and identifying a second previously estimated location from the plurality of previously estimated locations with a most recent timestamp. The method further includes calculating a difference between the first previously estimated location and the second previously estimated location, adjusting the new GNSS data based on the difference; and calculating a current estimated location of the ADV based on the adjusted GNSS data.

Latency compensation in inertial navigation system

In one embodiment, a system includes a global navigation satellite system (GNSS) receiver unit, a first inertial measurement unit (IMU) and a second IMU. The system may further include a first micro-controller unit (MCU) coupled to the first IMU and the GNSS receiver unit to receive data from the first IMU and the GNSS receiver unit and a second MCU coupled to the second IMU and the GNSS receiver unit to receive data from the second IMU and the GNSS receiver unit.

Dual inertial measurement units for inertial navigation system

A method comprising: receiving a multiplexed optical signal comprising optical channels for N wavelengths, N being a positive integer greater than or equal to two; and separating the multiplexed optical signal into a first multiplexed light and a second multiplexed light, each of the first multiplexed light and the second multiplexed light having the same polarization, and each of the first multiplexed light and the second multiplexed light having N wavelengths; separating the first multiplexed light into a plurality of first lights, each having a different wavelength; separating the second multiplexed light into a plurality of second lights simultaneous with separating the first multiplexed light into the first lights, each of the second lights having a different wavelength; and generating optical parameters for each optical channel in the N wavelengths using the first light and the second light for each wavelength.

Wavelength division multiplexed optical parameter detection receiver

A data center cooling system includes a housing to contain electronic racks of IT components operating therein, a coolant distribution unit (CDU) situated within the housing to control a liquid flow of a cooling liquid. One or more liquid cooling devices are disposed on the IT components to receive a first liquid from the CDU, to exchange or extract heat generated from the IT components, to transform the first liquid to a second liquid with a higher temperature, and to transmit the second liquid back to the CDU. The CDU is coupled to a heat transfer system to dissipate the exchanged heat to an external environment. The data center cooling system includes an airflow delivery system to generate a direct or indirect airflow to travel through the servers of the electronic racks to remove heat generated by the servers to the external environment eliminating chiller and IT fans.

Fan-less chiller-less liquid-air cooling for electronic racks of IT components in data centers

Fan-less chiller-less liquid-air cooling for electronic racks of it components in data centers

An electronic rack includes a heat removal liquid manifold, a number of server slots, and a number of server blades inserted therein. The liquid manifold distributes heat removal liquid from an external heat removal system to remove heat from the server blades. Each server blade includes a server tray to contain information technology (IT) components and a quick-release coupling assembly having a first liquid intake connector and a first liquid outlet connector coupled to a flexible hose to distribute the heat removal liquid to the IT components. The first liquid intake connector and the first liquid outlet connector are capable of extending outwardly external to the server tray to connect to, and disconnect from, a second liquid intake connector and a second liquid outlet connector mounted on the liquid manifold, respectively. The quick-release coupling assembly can self-retract and be secure to a block holder when disconnected.

Modular quick-release liquid heat removal coupling system for electronic racks

Probabilistic generation and decoding modulation symbols for use with optical communication. Codewords are generated using combinations of symbols from a modulation symbol alphabet, and each type of modulation symbol is sequentially generated using a hardware efficient combination generator that performs as a virtual lookup table (LUT). Likewise, decoding can be performed by sequentially identifying locations of individual modulation symbols within the received codeword.

Virtual lookup table for probabilistic constellation shaping

An apparatus comprising a polarization beam splitter optically coupled to a first light path and a second light path and configured to receive a CW light having a plurality of wavelengths, forward a first light beam of the CW light along the first light path, and forward a second light beam of the CW light along the second light path. A first multiplexer coupled to the first light path and configured to de-multiplex the first light beam into a first plurality of channels each corresponding to one of the plurality of wavelengths. A second multiplexer coupled to the second light path and configured to de-multiplex the second light beam into a second plurality of channels each corresponding to one of the plurality of wavelengths. A modulator coupled to the first multiplexer and the second multiplexer and configured to modulate the first plurality of channels and the second plurality of channels.

Wavelength division multiplexed polarization independent reflective modulators

A cooling module assembly includes a cold plate to be positioned adjacent to an exterior surface of a processor to receive heat radiated from the processor, and a cold plate mounting bracket attached to the cold plate to mount the cold plate onto the processor. The cold plate mounting bracket includes a first set of mounting slots to be aligned with a second set of mounting slots disposed on a processor mounting bracket that mounts the processor. Each of the mounting slots in the first set and the second set is configured in an asymmetric shape. The first and second sets of mounting slots allow a mounting pin to be inserted through in a first angle and to rotate from the first angle to a second angle after the insertion to interlock the cold plate with the exterior surface of the processor with proper mounting pressure loaded.

Cold plate assembly for server liquid cooling of electronic racks of a data center

An electronic rack includes computing nodes arranged in a stack. Each computing node includes electronics which are liquid cooled using liquid cold plates and air cooled using fans. The electronic rack further includes cooling fans, each corresponding to a computing node to provide air cooling to the computing node. The electronic rack further includes a pair of rack supply manifold and rack return manifold, and an air-to-liquid (A/L) heat exchanger. The rack supply manifold receives cooling liquid from a coolant distribution unit (CDU). The rack return manifold receives and returns warmer liquid carrying the heat back to the CDU. The A/L heat exchanger is connected to the rack liquid supply. The rack supply manifold receives the cooling liquid from the A/L heat exchanger, then to distribute the cooling liquid to each computing node to provide liquid cooling to processors.

Method for providing cooling to electronic racks using liquid cooling and air cooling

An electronic rack includes a back panel, a number of server slots, and a number of server blades inserted therein. The back panel includes a heat removal liquid manifold to provide heat removal liquid from an external heat removal system to remove heat from the server blades. Each server blade includes a server tray to contain an information technology (IT) component and a self-fitting coupling assembly having a first liquid intake connector and a first liquid outlet connector to self-align with a second liquid intake connector and a second liquid outlet connector mounted on the liquid manifold mounted on the back panel. The first liquid intake connector and the first liquid outlet connector are capable of moving around within a predetermined tolerance space with respect to the server tray.

Modular self-aligning liquid heat removal coupling system for electronic racks

An optimal controller is utilized minimize a total energy consumption of a CDU and cooling fans by optimizing a liquid pump speed of the CDU and fan speeds of the cooling fans collectively, while satisfying a set of constraints associated with liquid pump and the cooling fans. The total energy consumption includes a liquid pump energy cost and a fan energy cost. The optimal controller is to control the pump speed and fan speed at the same time to minimize the total energy cost, while keeping the processor's temperature below a predetermined reference temperature using an optimization function or model. The optimization model includes both the liquid and air cooling dynamics and converted the dynamics to a convex optimization problem. The optimization is performed to determine a set of pump speed and fan speeds such that the objective function reaches minimum, while the constraints are satisfied.

Optimal controller for hybrid liquid-air cooling system of electronic racks of a data center

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Sunnyvale, CA, United States of America

Yan Cui