公开(公告)号：US20250088576A1

公开(公告)日：2025-03-13

申请号：US18952135

申请日：2024-11-19

Applicant: Texas Instruments Incorporated

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

IPC: H04L69/22 ,  H04B1/69 ,  H04B3/30 ,  H04B3/54 ,  H04B10/11

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：US20240048643A1

公开(公告)日：2024-02-08

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 ,  H04B10/11 ,  H04B3/54

CPC classification number: H04L69/22 ,  H04B3/30 ,  H04B10/11 ,  H04B3/542 ,  H04B3/54 ,  H04B2001/6912

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：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：US09871630B2

公开(公告)日：2018-01-16

申请号：US14557858

申请日：2014-12-02

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak ,  Badri N. Varadarajan ,  Il Han Kim ,  Xiaolin Lu

IPC: H04W72/04 ,  H04L5/00 ,  H04B3/54 ,  H04L25/02

CPC classification number: H04L5/0048 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5483 ,  H04B2203/5491 ,  H04L5/0044 ,  H04L5/0055 ,  H04L5/0078 ,  H04L5/0094 ,  H04L25/0272

Abstract: Systems and methods for designing, using, and/or implementing hybrid communication networks are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, one or more of the techniques disclosed herein may include methods to coordinate medium-to-low voltage (MV-LV) and low-to-low voltage (LV-LV) PLC networks when the MV-LV network operates in a frequency subband mode and the LV-LV network operates in wideband mode (i.e., hybrid communications). In some cases, MV routers and LV routers may have different profiles. For instance, MV-LV communications may be performed using MAC superframe structures, and first-level LV to lower-level LV communications may take place using a beacon mode. Lower layer LV nodes may communicate using non-beacon modes. Also, initial scanning procedures may encourage first-to-second-level LV device communications rather than MV-to-first-level LV connections.

公开(公告)号：US09831909B2

公开(公告)日：2017-11-28

申请号：US15066549

申请日：2016-03-10

Applicant: Texas Instruments Incorporated

Inventor： Timothy Mark Schmidl ,  Anand G. Dabak

IPC: H04B1/00 ,  H04B1/707 ,  H04B1/7085 ,  H04L5/00 ,  H04L27/22

CPC classification number: H04B1/707 ,  H04B1/7085 ,  H04L5/0048 ,  H04L27/22

Abstract: A method of operating a transmitter (FIGS. 3A and 5A) is disclosed. The method includes receiving a sequence of data bits (DATA), wherein each data bit has a respective sequence number. A first data bit of the sequence is spread (508) with a first spreading code (504) determined by the sequence number (502) of the first data bit. A second data bit of the sequence is spread (508) with an inverse of the first spreading code (506) determined by the sequence number (502) of the second data bit. The first and second data bits are modulated (510) and transmitted (516) to a remote receiver.

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：US09584186B2

公开(公告)日：2017-02-28

申请号：US15072946

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak

IPC: H04B3/54 ,  H04B3/30 ,  H04H20/42 ,  H04L5/00 ,  H04L25/02

CPC classification number: H04B3/544 ,  H04B3/30 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04H20/42 ,  H04L5/005 ,  H04L25/024

Abstract: A communications device for Multi-Tone Mask (MTM) mode communications at a first router on a powerline communications (PLC) channel in a PLC network including a subnetwork including at least said first router associated with a plurality of nodes, comprising. A memory which stores a broadcast transmission MTM (BT-MTM) communications algorithm. A modem with processor is coupled to the memory. The processor is programmed to implement said BT-MTM communications algorithm, said BT-MTM communications algorithm.

Abstract translation: 包括在包括至少包括与多个节点相关联的所述第一路由器的子网络的PLC网络中的电力线通信（PLC）通道上的第一路由器处的多音调掩模（MTM）模式通信的通信设备。 存储广播传输MTM（BT-MTM）通信算法的存储器。 具有处理器的调制解调器耦合到存储器。 该处理器被编程为实现所述BT-MTM通信算法，所述BT-MTM通信算法。

公开(公告)号：US09474035B2

公开(公告)日：2016-10-18

申请号：US15132895

申请日：2016-04-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Anand G. Dabak ,  Eko N. Onggosanusi ,  Aris Papasakellariou

IPC: H04W56/00 ,  H04L5/00 ,  H04J13/00 ,  H04W72/04

CPC classification number: H04W56/001 ,  H04J13/0059 ,  H04J13/0062 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2655 ,  H04W72/0413

Abstract: The present disclosure provides a base station transmitter, a user equipment transmitter and methods of operating the base station and user equipment transmitters. In one embodiment, the base station transmitter is for use with a cellular communication system and includes a synchronization unit configured to provide a randomly-generated constant amplitude zero autocorrelation (random-CAZAC) sequence corresponding to a downlink synchronization signal. Additionally, the base station transmitter also includes a transmit unit configured to transmit the downlink synchronization signal using the random-CAZAC sequence. In another embodiment, the user equipment transmitter is for use with a cellular communication system and includes a reference signal unit configured to provide a random-CAZAC sequence for an uplink reference signal corresponding to a one resource block allocation of the user equipment. The user equipment transmitter also includes a transmit unit configured to transmit the uplink reference signal using the random-CAZAC sequence.

公开(公告)号：US09379904B2

公开(公告)日：2016-06-28

申请号：US15001925

申请日：2016-01-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak

IPC: H04L12/413 ,  H04L29/06 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04L69/02

Abstract: Power Line Communications (PLC) device for enhanced carrier sense multiple access (CSMA) protocols are described. The PLC device includes a modem, an AC interface and a PLC engine. The engine is configured for transmitting PLC packets over a plurality of electrical wires using a particular channel. Transmitting a normal priority packet may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.

Abstract translation: 描述了用于增强载波侦听多路访问（CSMA）协议的电力线通信（PLC）设备。 PLC设备包括调制解调器，AC接口和PLC引擎。 发动机被配置为使用特定通道在多个电线上传输PLC分组。 发送正常优先级分组可以包括尝试在与竞争窗口（CW）中的随机生成的数字成比例的退避时间之后访问通信信道以发送帧，所述CW具有从先前的不同的传输中携带的初始值 帧。 附加地或替代地，本文描述的技术中的一些技术可以有助于扩展这些设备尝试发送分组的时间，由此例如使用添加减少乘数增加（ADMI）机制来减少冲突的概率。