公开(公告)号：US20230085257A1

公开(公告)日：2023-03-16

申请号：US18053403

申请日：2022-11-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54 ,  H04L12/413

Abstract: Systems and methods for setting a carrier-sensing mechanism in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used—one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets the carrier-sensing mechanism based on the preamble detection.

公开(公告)号：US11502951B2

公开(公告)日：2022-11-15

申请号：US16899757

申请日：2020-06-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Srinivas Lingam

IPC: H04L12/26 ,  H04L45/00 ,  H04L43/08 ,  H04L45/74 ,  H04L47/24 ,  H04L43/16

Abstract: A method of communicating a packet between a first node and a second node, the packet comprising a data payload and a portion of information preceding the data payload. The method comprises: (i) first, identifying a quality of a channel between the first node and the second node; (ii) second, in response to the quality of the channel, selecting a manner of communication of the information preceding the data payload; (iii) third, encoding the selected manner of communication in the portion of information preceding data payload; and (iv) fourth, transmitting the packet from the first node to the second node.

公开(公告)号：US11277170B2

公开(公告)日：2022-03-15

申请号：US16885821

申请日：2020-05-28

Applicant: Texas Instruments Incorporated

Inventor： Il Han Kim ,  Anand G. Dabak ,  Tarkesh Pande

IPC: H04B3/54

Abstract: In a powerline communications (PLC) network having a first node and at least a second node on a PLC channel utilizing a band including a plurality of tones, based on at least one channel quality indicator (CQI), the first node allocates for a tone map response payload only a single (1) power control bit for each of a plurality of subbands having two or more tones. The power control bit indicates a first power state or a second power state. The first node transmits a frame including the tone map response payload to the second node. The second node transmits a frame having boosted signal power for the tones in the subbands which have the first power state compared to a lower signal power for the tones in the subbands which have the second power state.

公开(公告)号：US20210288691A1

公开(公告)日：2021-09-16

申请号：US17333374

申请日：2021-05-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： II Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04B3/54

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.

公开(公告)号：US11082541B2

公开(公告)日：2021-08-03

申请号：US14979730

申请日：2015-12-28

Applicant: Texas Instruments Incorporated

Inventor： Anand G. Dabak ,  Badri N Varadarajan ,  Il Han Kim ,  Tarkesh Pande

IPC: H04B1/66 ,  H04B7/14 ,  H04L29/06 ,  H04B3/30 ,  H04B10/11 ,  H04B3/54 ,  H04B1/69

Abstract: Methods for building, transmitting, and receiving frame structures in power line communications (PLC) are described. Various techniques described herein provide a preamble design using one or more symbols. One or more preamble symbols may be interspersed within a header portion of a PLC frame to facilitate estimation of a frame boundary and/or sampling frequency offset, for example, in the presence of impulsive noise.

公开(公告)号：US11025301B2

公开(公告)日：2021-06-01

申请号：US16239732

申请日：2019-01-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04B3/54

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.

公开(公告)号：US10396852B2

公开(公告)日：2019-08-27

申请号：US15946041

申请日：2018-04-05

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.

公开(公告)号：US10334087B2

公开(公告)日：2019-06-25

申请号：US15894250

申请日：2018-02-12

Applicant: Texas Instruments Incorporated

Inventor： Gang Xu ,  Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Anand G Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Xiaolin Lu

IPC: H04L29/06 ,  H04B3/54

Abstract: In a disclosed embodiment, a method for communication in a network includes receiving, at a first device registered to the network, a physical layer (PHY) frame that includes a PHY header and a MAC header. The PHY frame may further include a MAC payload. The PHY header includes a destination address field. The method further includes comparing a network address of the first device to the destination address field to determine whether the destination address field stores a value having the same number of bits as the network address. When the comparison indicates that the value stored by the destination address field does not have the same number of bits as the network address, the method skips decoding the MAC header and the MAC payload.

公开(公告)号：US10321831B2

公开(公告)日：2019-06-18

申请号：US15237941

申请日：2016-08-16

Applicant: Texas Instruments Incorporated

Inventor： Tarkesh Pande ,  David Patrick Magee ,  Rajan Narasimha

IPC: A61B5/00 ,  A61B5/024

Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate or rate of another pulsed signal, in which rate hypotheses or states, are identified for a current time window according to digital sample values of the pulsed signal for a current sample time window, and a rate change value is computed for potential rate transitions between states of the current and previous time windows. Transition pair branch metric values are computed as a function of the rate change value and a frequency domain amplitude of the corresponding rate hypothesis for the current time window, and the pulsed signal rate estimate is determined according to a maximum path metric computed according to the branch metric value and a corresponding path metric value for the previous time window.

公开(公告)号：US20190167129A1

公开(公告)日：2019-06-06

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.