公开(公告)号：US12120728B2

公开(公告)日：2024-10-15

申请号：US18324515

申请日：2023-05-26

Applicant: Texas Instruments Incorporated

Inventor： Bradford James Campbell ,  Ariton E. Xhafa ,  Anuj Batra

IPC: H04W72/56

CPC classification number: H04W72/56 ,  Y02D30/70

Abstract: A system and method for optimizing power consumption of energy harvesting nodes in a wireless sensor network. In one embodiment, a system includes a network coordinator. The network coordinator includes a wireless transceiver and a controller. The wireless transceiver is configured to provide access to the wireless sensor network. The controller is configured to determine whether a wireless device that is wirelessly communicating with the network coordinator is powered via energy harvesting. The controller is also configured to schedule, based on a determination that the wireless device is powered via energy harvesting, the wireless device to communicate via the wireless sensor network using a priority timeslot of a superframe of the wireless sensor network. The priority timeslot is a timeslot occurring in an initial portion of the superframe.

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：US10587380B2

公开(公告)日：2020-03-10

申请号：US16268050

申请日：2019-02-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

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

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：US20190140693A1

公开(公告)日：2019-05-09

申请号：US16239732

申请日：2019-01-04

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：US20190037379A1

公开(公告)日：2019-01-31

申请号：US16039412

申请日：2018-07-19

Applicant: Texas Instruments Incorporated

Inventor： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

IPC: H04W4/80 ,  H04W52/36 ,  H04L29/06 ,  H04L27/26 ,  H04L27/18 ,  H04W74/08 ,  H04W72/04 ,  H04L27/20

Abstract: In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment based on a constant symbol rate for BAN packet transmissions and based on M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK modulation. The PHY layer is configured to transmit and receive data in a frequency band selected from the group consisting of: 402-405 MHz, 420-450 MHz, 863-870 MHz, 902-928 MHz, 950-956 MHz, 2360-2400 MHz, and 2400-2483.5 MHz.

公开(公告)号：US10177814B2

公开(公告)日：2019-01-08

申请号：US14816671

申请日：2015-08-03

Applicant: Texas Instruments Incorporated

Inventor： Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04B3/00 ,  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：US09872130B2

公开(公告)日：2018-01-16

申请号：US15298829

申请日：2016-10-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anuj Batra ,  Timothy M. Schmidl ,  Srinath Hosur ,  June Chul Roh

IPC: H04J1/00 ,  H04W4/00 ,  H04L27/18 ,  H04L27/20 ,  H04L29/06 ,  H04L27/26 ,  H04W52/36

CPC classification number: H04W4/80 ,  H04L27/18 ,  H04L27/20 ,  H04L27/2675 ,  H04L69/22 ,  H04W52/36 ,  H04W52/367 ,  H04W72/0453 ,  H04W74/0816

Abstract: In at least some embodiments, a communication device includes a transceiver with a physical (PHY) layer. The PHY layer is configured for body area network (BAN) operations in a limited multipath environment using M-ary PSK, differential M-ary PSK or rotated differential M-ary PSK. Also, the PHY layer uses a constant symbol rate for BAN packet transmissions.

公开(公告)号：US20170366210A1

公开(公告)日：2017-12-21

申请号：US15690427

申请日：2017-08-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Anuj Batra ,  IL Han Kim

IPC: H04B1/10 ,  H04L5/00

CPC classification number: H04J11/0066 ,  H04L25/03821 ,  H04L27/2647

Abstract: An orthogonal frequency division multiplexing (OFDM) receiver includes detection logic, offset generation logic, tone erasure logic, and correction generation logic. The detection logic is configured to detect a signal containing a block of samples that includes a narrowband interferer from a communication channel. The offset generation logic is configured to align a frequency of the narrowband interferer to a center of a subcarrier frequency of the communication channel to produce an offset signal thereby introducing inter-carrier interference (ICI). The tone erasure logic is configured to remove the subcarrier frequency from the offset signal to produce an interferer erased offset signal. The correction generation logic is configured to remove the ICI to produce an interferer erased signal.

公开(公告)号：US20170317803A1

公开(公告)日：2017-11-02

申请号：US15651132

申请日：2017-07-17

Applicant: Texas Instruments Incorporated

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

IPC: H04L5/00 ,  H04L27/20 ,  H04B3/54 ,  H04W28/04 ,  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: mapping, via a mapping component, the first bit and the second bit into a first symbol; mapping, via the mapping component, the first bit and the second bit into a second symbol; dividing, via a dividing component, the transmission band into subcarriers; allocating, via an allocating component, the first symbol to a first subcarrier of the subcarriers; allocating, via the allocating component, the second symbol to a second subcarrier of the subcarriers; and differentially encoding, via a differential encoder, the first symbol and the second symbol.

公开(公告)号：US09692554B2

公开(公告)日：2017-06-27

申请号：US14885715

申请日：2015-10-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mehul Soman ,  Tarkesh Pande ,  Il Han Kim ,  Anuj Batra ,  Minghua Fu

IPC: H04L1/00 ,  H04B3/54 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04L1/0045 ,  H04B3/54 ,  H04L1/004 ,  H04L27/0002 ,  H04L27/2602

Abstract: A band of interest is divided into band segments. A scan frame is sent by a transmitter at a transmitting PLC node across each band segment. A receiver at a receiving node scans the band segments, listening for the scan frame. Upon detecting a scan frame, the receiving node measures the signal quality of each OFDM subcarrier modulated with symbols from the scan frame. The subcarrier signal quality values are stored in a table. Upon completion of the scan process, the table contains a signal quality value for each subcarrier within the band of interest. The table is then analyzed to find an operating band consisting of subcarriers with a highest average signal quality or a band that results in greater than a pre-determined minimum signal quality. The invented methods and embodiments may operate periodically to readjust the operating band configuration in the presence of electromagnetic interference including time-variant interference.