公开(公告)号：US08995580B2

公开(公告)日：2015-03-31

申请号：US14289223

申请日：2014-05-28

Applicant: Texas Instruments Incorporated

Inventor： Badri N. Varadarajan ,  Anand Ganesh Dabak ,  Tarkesh Pande ,  Eko N. Onggosanusi

IPC: H04L27/06 ,  H04L27/26 ,  H04L23/02

CPC classification number: H04L5/0048 ,  H04B1/04 ,  H04L23/02 ,  H04L25/0202 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2649

Abstract: In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence.

Abstract translation: 在一个实施例中，发射机包括被配置为提供参考信号比特序列的二进制序列发生器单元，其中该序列是小区识别参数的不可分离的功能，对应于发射机的循环前缀模式和一个或多个时间指数 序列。 发射机还包括将参考信号比特序列变换为复参考信号的映射单元，以及配置成发送复基准信号的发射单元。 在另一实施例中，接收机包括被配置为接收复参考信号的接收单元和被配置为从复参考信号检测参考信号位序列的参考信号解码器单元，其中该序列是小区识别参数的不可分离的函数 ，对应于发射机的循环前缀模式和序列的一个或多个时间索引。

公开(公告)号：US20150071364A1

公开(公告)日：2015-03-12

申请号：US14458662

申请日：2014-08-13

Applicant: Texas Instruments Incorporated

Inventor： Anuj Batra ,  Tarkesh Pande ,  IL Han Kim ,  Robert Weibo Liang ,  Mehul Madhav Soman

IPC: H04B3/54 ,  H04L12/931

CPC classification number: H04B3/542 ,  H04B2203/5408

Abstract: In a method for transmitting frames of data across a physical media that has a selective frequency response, a packet of data bytes is received by a media access (MAC) layer of a communication protocol from a local application for transmission to a remote receiver. The packet of data bytes is padded to from a padded packet of data bytes having a predetermined frame length, wherein the predetermined frame length is a frame length that is predetermined to provide correct transmission of a frame of data across the physical media that has a selective frequency response. The padded packet of data bytes is encoded by a physical (PHY) layer of the communication protocol to form multiple tone symbols. The multi-tone symbols are then transmitted on the physical media to the remote receiver.

Abstract translation: 在用于在具有选择性频率响应的物理介质上发送数据帧的方法中，数据字节分组由来自本地应用的通信协议的媒体接入（MAC）层接收以传输到远程接收机。 从具有预定帧长度的填充数据字节分组中填充数据字节分组，其中预定帧长度是预定的帧长度，以提供整个物理帧的数据的正确传输，该物理帧具有选择性 频率响应。 填充的数据字节分组由通信协议的物理（PHY）层编码以形成多个音调符号。 然后，多音调符号在物理介质上传输到远程接收器。

公开(公告)号：US20150071306A1

公开(公告)日：2015-03-12

申请号：US14450046

申请日：2014-08-01

Applicant: Texas Instruments Incorporated

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

IPC: H04L12/911

CPC classification number: H04L47/826 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5425 ,  H04K1/04 ,  H04K1/06 ,  H04L1/0071 ,  H04L5/0007 ,  H04L27/2627 ,  H04L27/3472 ,  H04L27/366

Abstract: A method of encoding a set of L bits for transmission on a transmission band through a transmission medium is provided, wherein L is a positive integer that is greater than 1. The method includes: mapping, via a mapping component, the L bits into M symbols; dividing, via a first dividing component, the transmission band into sub-bands; allocating, via an allocating component, the M symbols to individual sub-bands, respectively, for transmission at a first time; and allocating, via the allocating component, the M symbols to different individual sub-bands, respectively, for transmission at a second time.

Abstract translation: 提供一种通过传输介质对传输带上的一组L比特进行编码的方法，其中L是大于1的正整数。该方法包括：经由映射分量将L比特映射成M 符号; 经由第一分割部件将传输频带划分成子带; 分别经由分配组件将M个符号分配给各个子带，以便在第一时间进行传输; 并且经由分配组件分别将M个符号分配给不同的各个子带，以便在第二时间进行传输。

公开(公告)号：US20150043596A1

公开(公告)日：2015-02-12

申请号：US14449981

申请日：2014-08-01

Applicant: Texas Instruments Incorporated

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

IPC: H04L5/00 ,  H04L27/36 ,  H04B3/54 ,  H04L27/20

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.

Abstract translation: 提供了一种在传输频带上对第一位和第二位进行编码以进行传输的方法。 该方法包括：经由映射组件将第一位和第二位映射成第一符号; 经由所述映射组件将所述第一位和所述第二位映射到第二符号中; 通过划分成分将传输频带划分成子载波; 经由分配组件将所述第一符号分配给所述子载波的第一子载波，经由所述分配组件将所述第二符号分配给所述子载波的第二子载波; 以及经由差分编码器对第一符号和第二符号进行差分编码。

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：US20130343403A1

公开(公告)日：2013-12-26

申请号：US13916879

申请日：2013-06-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L1/1887

Abstract: Embodiments of methods and systems for transmitting and receiving segmented frames in a Power Line Communication (PLC) network are disclosed. A transmitter sends a first segment using CSMA/CA based on the priority of frame. All the other segments are transmitted using the CFS slot. When an ACK is received, transmitter sends the next segment after CFS. When a NACK is received, the transmitter sends just the last segment after CFS. If no ACK/NACK is received, the transmitter sends the last segment using CSMA/CA. If a NO_EARLIER_SEGMENTS delimiter is received, the transmitter sends the frame starting from the first segment using CSMA/CA. A receiver may send the NO_EARLIER_SEGMENTS delimiter when no earlier segments are in a receive buffer for reassembly. If the receiver is expecting to continue the reassembly of another frame when a segment is received, the receiver may transmit a BUSY_REASSEMBLY delimiter.

Abstract translation: 公开了用于在电力线通信（PLC）网络中发送和接收分段帧的方法和系统的实施例。 发射机根据帧的优先级使用CSMA / CA发送第一段。 所有其他段都使用CFS槽进行传输。 当接收到ACK时，发送器在CFS之后发送下一个段。 当接收到NACK时，发射机仅在CFS之后发送最后一个段。 如果没有接收到ACK / NACK，则发送器使用CSMA / CA发送最后一个段。 如果接收到NO_EARLIER_SEGMENTS分隔符，则发送器使用CSMA / CA从第一个分段开始发送帧。 当接收缓冲区中没有先前的段用于重新组装时，接收器可以发送NO_EARLIER_SEGMENTS分隔符。 如果接收器期望在接收到段时继续重新组合另一帧，则接收机可以发送BUSY_REASSEMBLY分隔符。

公开(公告)号：US20130322554A1

公开(公告)日：2013-12-05

申请号：US13910125

申请日：2013-06-05

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.