公开(公告)号：US12177323B2

公开(公告)日：2024-12-24

申请号：US18488551

申请日：2023-10-17

Applicant: Texas Instruments Incorporated

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

IPC: H04L69/22 ,  H04B3/30 ,  H04B3/54 ,  H04B10/11 ,  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：US20240014854A1

公开(公告)日：2024-01-11

申请号：US18470659

申请日：2023-09-20

Applicant: Texas Instruments Incorporated

Inventor： II 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.

公开(公告)号：US20230138448A1

公开(公告)日：2023-05-04

申请号：US18148024

申请日：2022-12-29

Applicant: Texas Instruments Incorporated

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

IPC: H04L69/22 ,  H04B3/30 ,  H04B10/11 ,  H04B3/54

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：US11496184B2

公开(公告)日：2022-11-08

申请号：US16852700

申请日：2020-04-20

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：US11024302B2

公开(公告)日：2021-06-01

申请号：US15706128

申请日：2017-09-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Lorin Paul Netsch ,  David Patrick Magee

IPC: G10L15/01 ,  G10L15/02 ,  G10L15/08 ,  G10L15/22

Abstract: Systems and methods are provided for an automated speech recognition system. A microphone records a keyword spoken by a user, and a front end divides the recorded keyword into a plurality of subunits, each containing a segment of recorded audio, and extracts a set of features from each of the plurality of subunits. A decoder assigns one of a plurality of content classes to each of the plurality of subunits according to at least the extracted set of features for each subunit. A quality evaluation component calculates a score representing a quality of the keyword from the content classes assigned to the plurality of subunits.

公开(公告)号：US11011155B2

公开(公告)日：2021-05-18

申请号：US16051607

申请日：2018-08-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Lorin Paul Netsch ,  David Patrick Magee

IPC: G06F17/00 ,  G10L15/02 ,  G10L15/14 ,  G06F16/31 ,  G10L15/08

Abstract: An example method includes: receiving a test phrase; comparing feature vectors of the test phrase to contents of a first database to generate a first score; comparing the feature vectors of the test phrase to contents of a second database to generate a second score; comparing feature vectors of the contents of the second database to the contents of the first database to generate a third score; comparing the feature vectors of the contents of the second database to a model of the test phrase to generate a fourth score; determining a first difference score based on a difference between the first and second scores; determining a second difference score based on a difference between the third and fourth scores; and generating a difference confidence score based on a lesser of the first and second difference scores.

公开(公告)号：US20200295802A1

公开(公告)日：2020-09-17

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：US10778482B2

公开(公告)日：2020-09-15

申请号：US16515248

申请日：2019-07-18

Applicant: Texas Instruments Incorporated

Inventor： Nikolaus Klemmer ,  Amneh Mohammed Akour ,  Abhijit Anant Patki ,  Timothy Patrick Pauletti ,  Tarkesh Pande

IPC: H04B1/16 ,  H04L27/14 ,  H04L27/06 ,  H04B1/69

Abstract: An integrated circuit includes a bit slicing circuit with a processing circuit. The processing circuit receives discrete frequency power estimates based on an S-FSK waveform received by an S-FSK receiver associated with the bit slicing circuit. The discrete frequency power estimates are representative of digital logic levels in a series of data frames modulated using S-FSK to form the S-FSK waveform. Each data frame including at least one word. Each word includes bit periods. The processing circuit receives SNR parameters that represent a dynamic SNR for the respective discrete frequency power estimates in relation to the series of data frames. The processing circuit selects a bit slicing technique from a set of available bit slicing techniques to generate data bit values for bit periods of the discrete frequency power estimates based on the SNR parameters. A method for performing bit slicing in an S-FSK receiver is also disclosed.

公开(公告)号：US10748557B2

公开(公告)日：2020-08-18

申请号：US16460651

申请日：2019-07-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ganesan Thiagarajan ,  Tarkesh Pande ,  David Patrick Magee

IPC: G10L15/00 ,  G10L25/84 ,  G10L25/21 ,  G10L25/09 ,  G10L25/78

Abstract: In described examples, a method for detecting voice activity includes: receiving a first input signal containing noise; sampling the first input signal to form noise samples; determining a first value corresponding to the noise samples; subsequently receiving a second input signal; sampling the second input signal to form second signal samples; determining a second value corresponding to the second signal samples; forming a ratio of the second value to the first value; comparing the ratio to a predetermined threshold value; and responsive to the comparing, indicating whether voice activity is detected in the second input signal.

公开(公告)号：US10729381B2

公开(公告)日：2020-08-04

申请号：US15192456

申请日：2016-06-24

Applicant: Texas Instruments Incorporated

Inventor： Tarkesh Pande ,  David Patrick Magee

IPC: A61B5/00 ,  A61B5/024

Abstract: A photoplethysmogram system includes a plurality of sensors, each sensor capable of providing a sensor signal, and an adaptive filter capable of receiving a first input signal and computing an output. The photoplethysmogram system is capable of operating the filter in sequential stages, such that at each different stage the first input signal is a different sensor signal.