公开(公告)号：US09413423B1

公开(公告)日：2016-08-09

申请号：US14829615

申请日：2015-08-18

Applicant: Texas Instruments Incorporated

Inventor： Tarkesh Pande ,  Anuj Batra ,  IL Han Kim

IPC: H04B17/00 ,  H04B3/46 ,  H04B3/54 ,  H04L1/00

CPC classification number: H04B3/46 ,  H04B3/54 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/20

Abstract: A device coupled to a noisy channel having periodic impulse noise in a network may estimate an effective signal to noise ratio (SNR) by receiving a packet of symbols. The device may determined a number of bad symbols N(bad) ratio in the packet due to interference and a remaining plurality of good symbols in the packet. An SNR value may be computed based on only the plurality of good symbols in the packet of symbols to form an SNR(good) value. An SNR correction value (SNR(offset)) may be determined as a function of the N(bad) ratio and the SNR(good) value. An effective SNR value may then be calculated by adjusting the SNR(good) value according to SNR(offset).

Abstract translation: 耦合到在网络中具有周期性脉冲噪声的噪声信道的设备可以通过接收符号分组来估计有效的信噪比（SNR）。 设备可以确定由于干扰而导致的分组中的不良符号N（不良）比率的数量以及分组中剩余的多个好的符号。 可以仅基于符号分组中的多个良好符号来计算SNR值，以形成SNR（良好）值。 可以将SNR校正值（SNR（偏移））确定为N（差）比和SNR（良好）值的函数。 然后可以通过根据SNR（偏移）调整SNR（良好）值来计算有效SNR值。

公开(公告)号：US20170366210A1

公开(公告)日：2017-12-21

申请号：US15690427

申请日：2017-08-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Anuj Batra ,  IL Han Kim

IPC: H04B1/10 ,  H04L5/00

CPC classification number: H04J11/0066 ,  H04L25/03821 ,  H04L27/2647

Abstract: An orthogonal frequency division multiplexing (OFDM) receiver includes detection logic, offset generation logic, tone erasure logic, and correction generation logic. The detection logic is configured to detect a signal containing a block of samples that includes a narrowband interferer from a communication channel. The offset generation logic is configured to align a frequency of the narrowband interferer to a center of a subcarrier frequency of the communication channel to produce an offset signal thereby introducing inter-carrier interference (ICI). The tone erasure logic is configured to remove the subcarrier frequency from the offset signal to produce an interferer erased offset signal. The correction generation logic is configured to remove the ICI to produce an interferer erased signal.

公开(公告)号：US20160119027A1

公开(公告)日：2016-04-28

申请号：US14990471

申请日：2016-01-07

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  IL Han Kim

IPC: H04B3/54 ,  H04B3/46

CPC classification number: H04B3/54 ,  H04B3/46 ,  H04B3/542 ,  H04B2203/5495

Abstract: Apparatus (and related methods) for a power line communication network include a processor configured to receive beacons over a communication interface. The processor determines a link quality indicator (LQI) for each received beacon and ignores the beacons for at most a predetermined maximum number of beacon receptions when each LQI is below a threshold. The processor responds to a received beacon if the LQI for such received beacon exceeds the threshold or if a predetermined maximum number of beacons have been received with LQIs below the threshold.

Abstract translation: 用于电力线通信网络的装置（和相关方法）包括被配置为通过通信接口接收信标的处理器。 处理器为每个接收到的信标确定链路质量指示符（LQI），并且当每个LQI低于阈值时，忽略至多一个预定最大数量的信标接收的信标。 如果用于这种接收到的信标的LQI超过阈值，或者如果已经接收到具有低于阈值的LQI的预定最大数量的信标，则处理器响应于所接收的信标。

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。