公开(公告)号：US20140112397A1

公开(公告)日：2014-04-24

申请号：US14056755

申请日：2013-10-17

Applicant: Texas Instruments Incorporated

Inventor： Anuj Batra ,  Tarkesh Pande ,  Il Han Kim

IPC: H04B3/54

CPC classification number: H04B3/542 ,  H04L27/2331 ,  H04L27/2613

Abstract: Embodiments of the invention provide a method for discriminating between two types of encoding schemes for the frame control header (FCH) used in G3-type narrow band OFDM communications. The two modes for encoding are Differential with respect to the previous Symbol (DS) and Differential with respect to the Preamble (DP). This mode is sometimes referred to as “coherent” mode

Abstract translation: 本发明的实施例提供了一种用于鉴别在G3型窄带OFDM通信中使用的帧控制报头（FCH）的两种类型的编码方案的方法。 编码的两种模式相对于先前的符号（DS）和差分相对于前导码（DP）是差分的。 这种模式有时被称为“相干”模式

公开(公告)号：US12009961B2

公开(公告)日：2024-06-11

申请号：US17142607

申请日：2021-01-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mostafa Sayed Ibrahim ,  Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04L27/26 ,  H04B3/54 ,  H04B7/0413 ,  H04L5/00 ,  H04L7/04 ,  H04W74/0816 ,  H04L1/1867

CPC classification number: H04L27/2656 ,  H04B3/54 ,  H04B3/542 ,  H04B3/546 ,  H04B7/0413 ,  H04L5/0023 ,  H04L7/042 ,  H04L27/26 ,  H04L27/2602 ,  H04L27/2603 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2663 ,  H04W74/0816 ,  H04L1/188

Abstract: A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A PLC device may include a delayed correlation detector and a cross-correlation detector operating in concert to facilitate preamble detection in one implementation.

公开(公告)号：US20210160119A1

公开(公告)日：2021-05-27

申请号：US17142607

申请日：2021-01-06

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mostafa Sayed Ibrahim ,  Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04L27/26 ,  H04B3/54 ,  H04L5/00 ,  H04B7/0413 ,  H04W74/08 ,  H04L7/04

Abstract: A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A PLC device may include a delayed correlation detector and a cross-correlation detector operating in concert to facilitate preamble detection in one implementation.

公开(公告)号：US10856124B2

公开(公告)日：2020-12-01

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 ,  H04L27/18 ,  H04L27/20 ,  H04L29/06 ,  H04L27/26 ,  H04W52/36 ,  H04W72/04 ,  H04W74/08

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：US10686914B2

公开(公告)日：2020-06-16

申请号：US14836443

申请日：2015-08-26

Applicant: Texas Instruments Incorporated

Inventor： Wonsoo Kim ,  Mehul Soman ,  Anuj Batra

IPC: H04L29/06 ,  H04L29/08 ,  H04B3/54

Abstract: A communication device in a network may receive a stream of frames from the network, in which each frame includes one or more beacon packets. A communication protocol being used by the network may be identified by tracking a preselected field within a sequence of beacon packets, in which the preselected field varies in a first known manner for a first protocol and in a second known manner for a second protocol. The communication device may then join to the network using the identified communication protocol to transmit and receive data.

公开(公告)号：US10680861B2

公开(公告)日：2020-06-09

申请号：US15899310

申请日：2018-02-19

Applicant: Texas Instruments Incorporated

Inventor： Timothy Mark Schmidl ,  Srinath Hosur ,  Anuj Batra

IPC: H04L27/00 ,  H04L27/26

Abstract: A method of communicating in a wireless network including a plurality of nodes having communications devices including a first node, wherein at least one node utilizes a first physical layer (PHY) modulation, and at least one other node utilizes a second PHY modulation different from the first PHY modulation. The first node receives a PHY frame transmitted by one of the plurality of nodes, and identifies a PHY modulation type selected from the first PHY modulation and the second PHY modulation used in the PHY frame or to be used in a subsequently to be received PHY frame or frame portion. The first node decodes the PHY frame or the subsequently to be received PHY frame or frame portion using the PHY modulation type identified in the identifying step.

公开(公告)号：US20190387531A1

公开(公告)日：2019-12-19

申请号：US16557002

申请日：2019-08-30

Applicant: Texas Instruments Incorporated

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

IPC: H04W72/10

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：US10405326B2

公开(公告)日：2019-09-03

申请号：US13951839

申请日：2013-07-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04W72/10

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：US10057745B2

公开(公告)日：2018-08-21

申请号：US15332138

申请日：2016-10-24

Applicant: Texas Instruments Incorporated

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

IPC: H04W4/30 ,  H04W4/80 ,  H04W4/00 ,  H04L27/26 ,  H04W72/04 ,  H04W52/36 ,  H04W74/08 ,  H04L27/20

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 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：US10034252B2

公开(公告)日：2018-07-24

申请号：US14025628

申请日：2013-09-12

Applicant: Texas Instruments Incorporated

Inventor： Timothy M. Schmidl ,  Anuj Batra ,  Srinath Hosur

IPC: H04W56/00 ,  H04L27/26 ,  H04W4/80

Abstract: A method includes receiving a first plurality of symbols comprising complex portions. The method further includes applying conjugate symmetry to the first plurality of symbols, producing a second plurality of symbols comprising no complex portions. The method further includes transforming the second plurality of symbols using an inverse fast Fourier transform, producing a third plurality of symbols. The method further includes interpolating the third plurality of symbols, generating a short training field comprising at least one real portion of the third plurality of symbols, generating a long training field comprising at least one real portion of the third plurality of symbols, and transmitting the short training field and long training field in a WPAN.