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    Coexitstence primitives in power line communication networks
    81.
    发明申请
    Coexitstence primitives in power line communication networks 有权
    电力线通信网络中的并行原语

    公开(公告)号：US20130343404A1

    公开(公告)日：2013-12-26

    申请号：US13923097

    申请日：2013-06-20

    Applicant: Texas Instruments Incorporated

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04B3/54

    CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L12/413

    Abstract: Systems and methods for setting a Network Allocation Vector (NAV) 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 NAV to EIFS if a native preamble is detected. The MAC sets NAV to cEIFS if only a coexistence preamble is detected or if a non-native preamble is detected.

    Abstract translation: 公布了在PLC节点中设置网络分配向量（NAV）的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 如果检测到本机前导码，则MAC将NAV设置为EIFS。 如果仅检测到共存前导码或者是否检测到非本地前导码，则MAC将NAV设置为cEIFS。

    Network Throughput Using Multiple Reed-Solomon Blocks
    83.
    发明申请
    Network Throughput Using Multiple Reed-Solomon Blocks 有权
    使用多个Reed-Solomon块的网络吞吐量

    公开(公告)号：US20130254615A1

    公开(公告)日：2013-09-26

    申请号：US13848054

    申请日：2013-03-20

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Tarkesh Pande ,  Ramanuja Vedantham

    IPC: H04L12/70 ,  H04L1/08 ,  H03M13/09

    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 generating PHY frames with multiple Reed-Solomon encoded blocks in PLC networks. In one embodiment, a MAC layer divides a data frame from a higher level into data blocks. The MAC layer may add a MAC header and/or an error-detection code to each data block. The MAC layer then passes the data blocks to a PHY layer to be individually Reed-Solomon encoded and combined into a single PHY frame for transmission on a PLC network. In other embodiments, the MAC layer passes a single data frame to the PHY layer, which divides the MAC data frame into segments to be individually Reed-Solomon encoded. The individual Reed-Solomon encoded segments are combined into a single PHY frame for transmission on a PLC network.

    Abstract translation: 提出了用于在PLC网络中生成具有多个Reed-Solomon编码块的PHY帧的方法和系统的实施例。 在一个实施例中，MAC层将数据帧从较高级划分成数据块。 MAC层可以向每个数据块添加MAC报头和/或错误检测码。 然后，MAC层将数据块传送到PHY层，以单独进行Reed-Solomon编码并组合成单个PHY帧，以在PLC网络上传输。 在其他实施例中，MAC层将单个数据帧传递到PHY层，该PHY层将MAC数据帧划分成单独的Reed-Solomon编码的段。 单独的Reed-Solomon编码段被组合成单个PHY帧以在PLC网络上传输。

    Multi-Length Cyclic Prefix for OFDM Transmission in PLC Channels
    84.
    发明申请
    Multi-Length Cyclic Prefix for OFDM Transmission in PLC Channels 有权
    PLC通道中OFDM传输的多长度循环前缀

    公开(公告)号：US20130223457A1

    公开(公告)日：2013-08-29

    申请号：US13781452

    申请日：2013-02-28

    Applicant: TEXAS INSTRUMENTS INCORPORATED

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

    IPC: 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.

    Abstract translation: 本发明的实施例为数据有效载荷和帧控制报头或仅数据有效载荷提供多个循环前缀长度。 帧控制报头（FCH）和数据符号具有关联的循环前缀。 在FCH符号中发送表，其包括循环前缀字段以标识在数据有效载荷中使用的循环前缀长度。 在一个实施例中，接收机可以知道在FCH符号中使用的循环前缀长度。 在其他实施例中，接收机不知道FCH循环前缀长度，因此，尝试使用不同的可能循环前缀长度对FCH符号进行解码，直到FCH符号被成功解码。

    Sub-Band Power Scaling Reporting and Sub-Band Transmit Power Estimation
    85.
    发明申请
    Sub-Band Power Scaling Reporting and Sub-Band Transmit Power Estimation 审中-公开
    子带功率缩放报告和子带发射功率估计

    公开(公告)号：US20130101055A1

    公开(公告)日：2013-04-25

    申请号：US13656694

    申请日：2012-10-20

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Tarkesh Pande ,  Anand Dabak ,  Kumaran Vijayasankar ,  Ramanuja Venantham ,  Il Han Kim

    IPC: H04B3/54

    CPC classification number: H04B3/54 ,  H04B2203/5416 ,  H04L5/0094 ,  H04L27/04 ,  H04L27/18 ,  H04L27/2602 ,  H04L27/32

    Abstract: Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method performed by a PLC device, such as a PLC meter, may include selecting one or more transmit sub-bands on which to transmit frames, where the transmit sub-bands comprise groups of six carrier frequencies. The PLC device then generates a frame comprising a tone map that indicates which transmit sub-bands are used to carry data for the frame. The tone map using two bits per transmit sub-band to indicate a status of each transmit sub-band. The PLC device then transmits the frame on the selected transmit sub-bands using OFDM. A resolution bit and a mode bit may be used to provide additional information about the transmit sub-bands, such as an amount of power adjustment that has been applied to carrier frequencies and whether dummy bits are transmitted on unused carrier frequencies.

    Abstract translation: 描述了用于电力线通信（PLC）的路由协议的系统和方法。 在一些实施例中，由诸如PLC计量器之类的PLC设备执行的方法可以包括选择一个或多个在其上发射帧的发射子带，其中发射子带包括六个载波频率的组。 然后，PLC设备生成包括音调映射的帧，该音调映射指示哪些发送子带被用于携带用于该帧的数据。 每个发送子带使用两位的色调映射表示每个发送子带的状态。 然后，PLC设备使用OFDM在所选择的发送子带上发送帧。 可以使用分辨率位和模式位来提供关于发射子带的附加信息，例如已经应用于载波频率的功率调整量以及在未使用的载波频率上是否发送虚拟位。

    Long preamble and duty cycle based coexistence mechanism for power line communication (PLC) networks
    86.
    发明授权
    Long preamble and duty cycle based coexistence mechanism for power line communication (PLC) networks 有权

    公开(公告)号：US12132530B2

    公开(公告)日：2024-10-29

    申请号：US18333659

    申请日：2023-06-13

    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.

    Heart rate estimation apparatus with state sequence optimization
    88.
    发明授权
    Heart rate estimation apparatus with state sequence optimization 有权

    公开(公告)号：US12042257B2

    公开(公告)日：2024-07-23

    申请号：US17412580

    申请日：2021-08-26

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Tarkesh Pande ,  David Patrick Magee ,  Rajan Narasimha

    IPC: A61B5/02 ,  A61B5/00 ,  A61B5/024

    CPC classification number: A61B5/02427 ,  A61B5/02416 ,  A61B5/7225 ,  A61B5/7278 ,  A61B5/7275

    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.

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