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    Vehicle navigation system with dead reckoning
    51.
    发明授权
    Vehicle navigation system with dead reckoning 有权
    具有航位推算的车辆导航系统

    公开(公告)号：US08825397B2

    公开(公告)日：2014-09-02

    申请号：US13668381

    申请日：2012-11-05

    Applicant: Texas Instruments Incorporated

    Inventor： Sandeep Kasargod ,  Sandeep Rao ,  Karthik Ramasubramanian ,  Tarkesh Pande ,  Sriram Murali

    IPC: G01C21/12 ,  G01C21/16

    CPC classification number: G01C21/12 ,  G01C21/165 ,  G01S19/42 ,  G01S19/45

    Abstract: A vehicle navigation system includes a GNSS position engine (GPE) that uses GNSS satellite measurements to compute a first position and velocity of a vehicle and a first quality metric associated with the position and velocity. The system also includes a dead reckoning engine (DRE) that operates parallel with the GPE that computes a second position and velocity and a second quality metric associated with the dead reckoning. The GPE is configured to use the second position and velocity to detect a set of outliers in an incoming GNSS measurement; use the second position and velocity as an initial estimate of its position and velocity for a particular time instant, which is then refined by GNSS measurements received at that particular time instant; and to replace the first position and velocity with the second position and velocity.

    Abstract translation: 车辆导航系统包括使用GNSS卫星测量来计算车辆的第一位置和速度以及与位置和速度相关联的第一质量度量的GNSS位置引擎（GPE）。 该系统还包括与计算第二位置和速度的GPE并行运行的航位推算引擎（DRE），以及与推算相关联的第二质量度量。 GPE被配置为使用第二位置和速度来检测进入GNSS测量中的一组异常值; 使用第二位置和速度作为其在特定时间瞬间的位置和速度的初始估计，然后通过在该特定时刻接收的GNSS测量来改进; 并用第二位置和速度来替换第一位置和速度。

    High Performance Turbo DPSK
    52.
    发明申请
    High Performance Turbo DPSK 审中-公开
    高性能Turbo DPSK

    公开(公告)号：US20140064412A1

    公开(公告)日：2014-03-06

    申请号：US14015728

    申请日：2013-08-30

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Jing Lin ,  Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

    IPC: H04L27/22

    CPC classification number: H04L27/22 ,  H04L25/03171 ,  H04L25/03242 ,  H04L27/2071

    Abstract: A system includes a DPSK transmitter and a DPSK receiver. The DPSK transmitter is configured to encode a signal and transmit the encoded signal as a sequence of symbols. The DPSK receiver is configured to decode the sequence of symbols into bit values. The DPSK receiver further includes a first decoder which is configured to receive the sequence of the symbols, and to estimate extrinsic information for each symbol and forward the extrinsic information to a second decoder. Moreover, if magnitude of a LLR received form a second decoder is greater than a threshold, the first decoder is configured to determine a bit value of a received symbol, without considering neighboring symbols in the sequence of symbols. Still moreover, if the magnitude of the LLR received from the second decoder is not greater than the threshold, the first decoder is configured to continue to decode the received symbol and consider neighboring symbols in the sequence of symbols.

    Abstract translation: 系统包括DPSK发射机和DPSK接收机。 DPSK发送器被配置为对信号进行编码，并将编码信号作为符号序列发送。 DPSK接收器被配置为将符号序列解码为比特值。 DPSK接收机还包括第一解码器，其被配置为接收符号的序列，并估计每个符号的外在信息，并将外部信息转发到第二解码器。 此外，如果从第二解码器接收的LLR的大小大于阈值，则第一解码器被配置为确定接收符号的比特值，而不考虑符号序列中的相邻符号。 此外，如果从第二解码器接收的LLR的大小不大于阈值，则第一解码器被配置为继续解码接收的符号并考虑符号序列中的相邻符号。

    Robust mode for power line communications
    56.
    发明授权
    Robust mode for power line communications 有权

    公开(公告)号：US11824597B2

    公开(公告)日：2023-11-21

    申请号：US17333374

    申请日：2021-05-28

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

    IPC: H04B3/54

    CPC classification number: H04B3/542 ,  H04B2203/5433 ,  H04B2203/5466

    Abstract: Embodiments include methods of powerline communications using a preamble with band extension is provided. A method may include receiving a packet data unit PDU. Bit-level repetition is applied to at least a portion of the PDU to create a repeated portion. Interleaving is performed per a subchannel. Pilot tones are inserted in the interleaved portion. Each data tone is modulated with respect to a nearest one of the inserted pilot tones. The PDU is transmitted over a power line.

    Long preamble and duty cycle based coexistence mechanism for power line communication (PLC) networks
    57.
    发明授权
    Long preamble and duty cycle based coexistence mechanism for power line communication (PLC) networks 有权

    公开(公告)号：US11722174B2

    公开(公告)日：2023-08-08

    申请号：US17119831

    申请日：2020-12-11

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04B3/54

    CPC classification number: H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445

    Abstract: Embodiments of methods and systems for supporting coexistence of multiple technologies in a Power Line Communication (PLC) network are disclosed. A long coexistence preamble sequence may be transmitted by a device that has been forced to back off the PLC channel multiple times. The long coexistence sequence provides a way for the device to request channel access from devices on the channel using other technology. The device may transmit a data packet after transmitting the long coexistence preamble sequence. A network duty cycle time may also be defined as a maximum allowed duration for nodes of the same network to access the channel. When the network duty cycle time occurs, all nodes will back off the channel for a duty cycle extended inter frame space before transmitting again. The long coexistence preamble sequence and the network duty cycle time may be used together.

    Long preamble and duty cycle based coexistence mechanism for power line communication (PLC) networks
    59.
    发明授权
    Long preamble and duty cycle based coexistence mechanism for power line communication (PLC) networks 有权

    公开(公告)号：US10903874B2

    公开(公告)日：2021-01-26

    申请号：US16552911

    申请日：2019-08-27

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04B3/54

    Abstract: Embodiments of methods and systems for supporting coexistence of multiple technologies in a Power Line Communication (PLC) network are disclosed. A long coexistence preamble sequence may be transmitted by a device that has been forced to back off the PLC channel multiple times. The long coexistence sequence provides a way for the device to request channel access from devices on the channel using other technology. The device may transmit a data packet after transmitting the long coexistence preamble sequence. A network duty cycle time may also be defined as a maximum allowed duration for nodes of the same network to access the channel. When the network duty cycle time occurs, all nodes will back off the channel for a duty cycle extended inter frame space before transmitting again. The long coexistence preamble sequence and the network duty cycle time may be used together.

    Heart rate measurement and a photoplethysmograph (PPG) heart rate monitor
    60.
    发明授权
    Heart rate measurement and a photoplethysmograph (PPG) heart rate monitor 有权

    公开(公告)号：US10893815B2

    公开(公告)日：2021-01-19

    申请号：US16271246

    申请日：2019-02-08

    Applicant: Texas Instruments Incorporated

    Inventor： Tarkesh Pande ,  David Patrick Magee

    IPC: A61B5/024 ,  A61B5/00

    Abstract: A method for heart rate measurement in a photoplethysmograph (PPG) heart rate monitor device is provided that includes performing motion compensation on a PPG signal wherein a motion compensated PPG signal PPGaccX is generated with reference to an X-axis acceleration signal, a motion compensated PPG signal PPGaccY is generated with reference to a Y-axis acceleration signal, and a motion compensated PPG signal PPGaccZ is generated with reference to a Z-axis acceleration signal, combining PPGaccX, PPGaccY, and PPGaccZ to generate a final motion compensated PPG signal, wherein a first weight is applied PPGaccX, a second weight is applied to PPGaccY, and a third weight is applied to PPGaccZ, performing a single Fourier Transform (FT) on the final motion compensated PPG signal to generate a frequency domain PPG signal; and estimating a heart rate based on the frequency domain PPG signal.

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