公开(公告)号：US20200374227A1

公开(公告)日：2020-11-26

申请号：US16899757

申请日：2020-06-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Srinivas Lingam

IPC: H04L12/721 ,  H04L12/26 ,  H04L12/741 ,  H04L12/833

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：US10720963B2

公开(公告)日：2020-07-21

申请号：US16160864

申请日：2018-10-15

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：US20190280736A1

公开(公告)日：2019-09-12

申请号：US16355180

申请日：2019-03-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Anand G. Dabak ,  II-Han Kim

IPC: H04B3/54

Abstract: Embodiments of the invention provide multiple cyclic prefix lengths for either both the data-payload and frame control header or only the data payload. Frame control header (FCH) and data symbols have an associated cyclic prefix. A table is transmitted in the FCH symbols, which includes a cyclic prefix field to identify the cyclic prefix length used in the data payload. A receiver may know the cyclic prefix length used in the FCH symbols in one embodiment. In other embodiments, the receiver does not know the FCH cyclic prefix length and, therefore, attempts to decode the FCH symbols using different possible cyclic prefix lengths until the FCH symbols are successfully decoded.

公开(公告)号：US20190173643A1

公开(公告)日：2019-06-06

申请号：US16268050

申请日：2019-02-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04L5/00 ,  H04W28/04 ,  H04W72/12 ,  H04L27/20 ,  H04B3/54 ,  H04L27/36

CPC classification number: H04L5/0048 ,  H04B3/54 ,  H04B2203/5408 ,  H04L27/20 ,  H04L27/36 ,  H04W28/04 ,  H04W72/1263

Abstract: A method of encoding a first bit and a second bit for transmission on a transmission band is provided. The method includes receiving a bit stream that includes the first and second bits, mapping the first bit into a first symbol, mapping the second bit into a second symbol, differentially encoding at least the first symbol and the second symbol, and causing the first and second symbols to be transmitted on a transmission band as part of a symbol stream.

公开(公告)号：US10135492B2

公开(公告)日：2018-11-20

申请号：US14072765

申请日：2013-11-05

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anuj Batra ,  Tarkesh Pande ,  Il Han Kim

IPC: H04B3/54 ,  H04L12/64

Abstract: In a method for communicating with a plurality of devices using different communication protocols, a signal is received at a transceiver device from a neighbor device via a physical layer of a communication media. At a first time the signal contains a header frame from a first device conforming to a first communication protocol and at another time the signal contains a header frame from a second device conforming to a second communication protocol. The transceiver determines which of the different communication protocols is being used by each of the plurality of devices. The transceiver may then process inbound payload data using the indentified protocol type. Data frames are transmitted to the first device using the first communication protocol and data frames are transmitted to the second device using the second communication protocol.

公开(公告)号：US09941929B2

公开(公告)日：2018-04-10

申请号：US14824506

申请日：2015-08-12

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.

公开(公告)号：US09787361B2

公开(公告)日：2017-10-10

申请号：US15227367

申请日：2016-08-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04L12/50 ,  H04B3/54

CPC classification number: H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416

Abstract: Embodiments of the invention provide multiple cyclic prefix lengths for either both the data-payload and frame control header or only the data payload. Frame control header (FCH) and data symbols have an associated cyclic prefix. A table is transmitted in the FCH symbols, which includes a cyclic prefix field to identify the cyclic prefix length used in the data payload. A receiver may know the cyclic prefix length used in the FCH symbols in one embodiment. In other embodiments, the receiver does not know the FCH cyclic prefix length and, therefore, attempts to decode the FCH symbols using different possible cyclic prefix lengths until the FCH symbols are successfully decoded.

公开(公告)号：US09774421B2

公开(公告)日：2017-09-26

申请号：US14925030

申请日：2015-10-28

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Tarkesh Pande ,  Ramanuja Vedantham

IPC: H04L1/00 ,  H04L12/801 ,  H04L1/08 ,  H03M13/09 ,  H04B3/54 ,  G06F11/10 ,  H03M13/15 ,  H04L1/16

CPC classification number: H04L1/005 ,  G06F11/1004 ,  H03M13/09 ,  H03M13/1515 ,  H04B3/542 ,  H04B3/544 ,  H04B2203/5408 ,  H04L1/0057 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/1607 ,  H04L47/10

Abstract: Embodiments of methods and systems are presented for handling PHY frames with multiple Reed-Solomon encoded blocks in PLC networks. A PHY frame is receive from a PLC device, the PHY frame comprising two or more Reed-Solomon encoded blocks. A first Reed-Solomon encoded block comprises a media access control (MAC) header. The first Reed-Solomon encoded block is decoded. An error-detection check is performed on the first decoded Reed-Solomon encoded block.

公开(公告)号：US20170143274A1

公开(公告)日：2017-05-25

申请号：US15203859

申请日：2016-07-07

Applicant: Texas Instruments Incorporated

Inventor： Tarkesh Pande ,  David Patrick Magee

IPC: A61B5/00 ,  A61B5/024

Abstract: Disclosed examples include heart rate monitor systems and methods to estimate a patient heart rate, in which a processor filters digital photoplethysmogram (PPG) sample values representing transmission or reflection of a light signal in the patient during a time window, performs motion compensation processing on the filtered values, computes a gain value for individual segments of the time window using the motion compensated values, applies the individual gain values to the motion compensated values of blocks associated with the corresponding segments, and determines a heart rate estimate value representing the patient heart rate according to the frequency content of the adjusted values.

公开(公告)号：US20170143218A1

公开(公告)日：2017-05-25

申请号：US15237941

申请日：2016-08-16

Applicant: Texas Instruments Incorporated

Inventor： Tarkesh Pande ,  David Patrick Magee ,  Rajan Narasimha

IPC: A61B5/024 ,  A61B5/00

CPC classification number: A61B5/02427 ,  A61B5/7225 ,  A61B5/7275 ,  A61B5/7278

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.