公开(公告)号：US20170366230A1

公开(公告)日：2017-12-21

申请号：US15695983

申请日：2017-09-05

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.

公开(公告)号：US20170115388A1

公开(公告)日：2017-04-27

申请号：US15236650

申请日：2016-08-15

Applicant: Texas Instruments Incorporated

Inventor： Amardeep Sathyanarayana ,  David P. Magee ,  Anand G. Dabak ,  Srinath M. Ramaswamy

IPC: G01S15/32

CPC classification number: G01F1/667 ,  G01S15/104 ,  G01S15/107

Abstract: A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

公开(公告)号：US09438310B2

公开(公告)日：2016-09-06

申请号：US13781452

申请日：2013-02-28

Applicant: Texas Instruments Incorporated

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

IPC: H04L12/28 ,  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。

公开(公告)号：US20150373738A1

公开(公告)日：2015-12-24

申请号：US14840933

申请日：2015-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： ARIS PAPASAKELLARIOU ,  Timothy M. Schmidl ,  Eko N. Onggosanusi ,  Anand G. Dabak

IPC: H04W72/12 ,  H04W72/00 ,  H04L27/26 ,  H04L12/18

CPC classification number: H04W72/1289 ,  G06Q20/10 ,  G06Q30/00 ,  G06Q40/00 ,  H04L5/0048 ,  H04L5/0053 ,  H04L12/18 ,  H04L27/2601 ,  H04L27/2602 ,  H04N21/437 ,  H04N21/44209 ,  H04W52/322 ,  H04W72/005 ,  H04W72/1205 ,  H04W72/14

Abstract: Embodiments of the invention provide methods for maximizing the bandwidth utilization in the uplink of a communication system supporting time division multiplexing between unicast and multicast/broadcast communication modes during transmission time intervals in the downlink of a communication system. This is accomplished by multiplexing at least unicast control signaling for UL scheduling assignments in TTIs supporting the multicast/broadcast communication mode. Moreover, multiplexing of unicast control signaling can also be accomplished by splitting a symbol of the multicast/broadcast TTI into two shorter symbols with the first of these two shorter symbols carrying at least unicast control signaling and the second of these shorter symbols carrying multicast/broadcast signaling.

Abstract translation: 本发明的实施例提供了一种用于在通信系统的下行链路中的传输时间间隔期间最大化在单播和多播/广播通信模式之间支持时分复用的通信系统的上行链路中的带宽利用率的方法。 这通过在支持多播/广播通信模式的TTI中多路复用至少用于UL调度分配的单播控制信令来实现。 此外，单播控制信令的复用也可以通过将多播/广播TTI的符号分成两个较短的符号来实现，其中这两个较短的符号中的第一个携带至少单播控制信令，并且这些较短的符号中的第二个携带多播/广播 信令。

公开(公告)号：US20140146900A1

公开(公告)日：2014-05-29

申请号：US14169773

申请日：2014-01-31

Applicant: Texas Instruments Incorporated

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

IPC: H04B3/54

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

Abstract: Systems and 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 based on a chirp signal that yields a low peak-to-average power ratio (PAPR). According to some techniques, the preamble may be constructed with one or more different types and/or number of symbols configured to identify a PLC domain operating in close physical proximity to another PLC domain. According to other techniques, 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. According to yet other techniques, a PLC detector may be capable of receiving and decoding two or more types of PLC frames (e.g., using different PLC standards).

Abstract translation: 描述了在电力线通信（PLC）中构建，发送和接收帧结构的系统和方法。 本文描述的各种技术基于产生低峰值与平均功率比（PAPR）的啁啾信号提供使用一个或多个符号的前导码设计。 根据一些技术，可以使用一个或多个不同类型和/或符号数来构造前导码，该符号被配置为识别在与另一个PLC域紧密物理接近的操作的PLC域。 根据其他技术，一个或多个前导符号可以散布在PLC帧的报头部分内，以便于例如在存在脉冲噪声的情况下估计帧边界和/或采样频率偏移。 根据其他技术，PLC检测器可能能够接收和解码两个或更多类型的PLC帧（例如，使用不同的PLC标准）。