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    SNR calculation in impulsive noise and erasure channels
    41.
    发明授权
    SNR calculation in impulsive noise and erasure channels 有权
    脉冲噪声和擦除通道中的SNR计算

    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。

    POWER LINE COMMUNICATION OPERATING FREQUENCY BAND SELECTION APPARATUS, SYSTEMS AND METHODS
    42.
    发明申请
    POWER LINE COMMUNICATION OPERATING FREQUENCY BAND SELECTION APPARATUS, SYSTEMS AND METHODS 有权
    电力线通信工作频段选择装置，系统和方法

    公开(公告)号：US20160127056A1

    公开(公告)日：2016-05-05

    申请号：US14885715

    申请日：2015-10-16

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Mehul Soman ,  Tarkesh Pande ,  Il Han Kim ,  Anuj Batra ,  Minghua Fu

    IPC: H04B17/336 ,  H04L1/00 ,  H04L27/00 ,  H04L27/26 ,  H04B3/54

    CPC classification number: H04L1/0045 ,  H04B3/54 ,  H04L1/004 ,  H04L27/0002 ,  H04L27/2602

    Abstract: A band of interest is divided into band segments. A scan frame is sent by a transmitter at a transmitting PLC node across each band segment. A receiver at a receiving node scans the band segments, listening for the scan frame. Upon detecting a scan frame, the receiving node measures the signal quality of each OFDM subcarrier modulated with symbols from the scan frame. The subcarrier signal quality values are stored in a table. Upon completion of the scan process, the table contains a signal quality value for each subcarrier within the band of interest. The table is then analyzed to find an operating band consisting of subcarriers with a highest average signal quality or a band that results in greater than a pre-determined minimum signal quality. The invented methods and embodiments may operate periodically to readjust the operating band configuration in the presence of electromagnetic interference including time-variant interference.

    Abstract translation: 感兴趣的乐队分为乐队段。 扫描帧由发射机在每个频段的发送PLC节点发送。 在接收节点处的接收机扫描带段，监听扫描帧。 在检测到扫描帧时，接收节点测量利用来自扫描帧的符号调制的每个OFDM副载波的信号质量。 子载波信号质量值存储在表中。 扫描过程完成后，该表包含感兴趣的频带内每个子载波的信号质量值。 然后分析表以找到由具有最高平均信号质量的子载波组成的操作频带或导致大于预定的最小信号质量的频带。 本发明的方法和实施例可以周期性地操作以在存在包括时变干扰的电磁干扰的情况下重新调整工作频带配置。

    PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS
    43.
    发明申请
    PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS 审中-公开

    公开(公告)号：US20160119094A1

    公开(公告)日：2016-04-28

    申请号：US14289264

    申请日：2014-05-28

    Applicant: Texas Instruments Incorporated

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

    IPC: H04L5/00 ,  H04L25/02 ,  H04B1/04

    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.

    Power Line Communication (PLC) Network Nodes Using Cipher Then Segment Security
    46.
    发明申请
    Power Line Communication (PLC) Network Nodes Using Cipher Then Segment Security 审中-公开
    电力线通信（PLC）网络节点使用密码然后段安全性

    公开(公告)号：US20150381355A1

    公开(公告)日：2015-12-31

    申请号：US14826342

    申请日：2015-08-14

    Applicant: Texas Instruments Incorporated

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04L9/08 ,  H04B3/54

    CPC classification number: H04L63/123 ,  G06F15/177 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04L9/0819 ,  H04L9/30 ,  H04L9/3242 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/0876 ,  H04L2209/24

    Abstract: Embodiments of the invention provide systems and methods for a cipher then segment approach in a Power Line Communication (PLC). A node or device generates frames to be transmitted to a destination node in the PLC network. A processor in the node is configured to generate a data payload comprising data to be sent to the destination node. The processor divides the data payload into two or more payload segments and encrypts the payload segments. The processor creates a frame for each of the encrypted payload segments, wherein each frame comprises a message integrity code. The processor creates a segment identifier for each frame using the message integrity code and an authentication key that is shared with the destination PLC node. The segment identifier is added to each frame.

    Abstract translation: 本发明的实施例提供了用于电力线通信（PLC）中的密码然后段方法的系统和方法。 节点或设备生成要发送到PLC网络中的目标节点的帧。 节点中的处理器被配置为生成包括要发送到目的地节点的数据的数据净荷。 处理器将数据有效载荷分成两个或多个有效载荷段，并加密有效载荷段。 处理器为每个加密的有效载荷段创建一个帧，其中每个帧包括消息完整性代码。 处理器使用消息完整性代码和与目标PLC节点共享的认证密钥为每个帧创建段标识符。 段标识符被添加到每个帧。

    Cyclic shift selection for MIMO narrowband power line communications
    47.
    发明授权
    Cyclic shift selection for MIMO narrowband power line communications 有权
    MIMO窄带电力线通信的循环移位选择

    公开(公告)号：US09184794B1

    公开(公告)日：2015-11-10

    申请号：US14583853

    申请日：2014-12-29

    Applicant: Texas Instruments Incorporated

    Inventor： Mostafa Sayed Ibrahim ,  Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

    IPC: H04B3/54 ,  H04L27/26

    CPC classification number: H04L27/2656 ,  H04B3/54 ,  H04B3/542 ,  H04B3/546 ,  H04B7/0413 ,  H04L1/188 ,  H04L5/0023 ,  H04L7/042 ,  H04L27/26 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2663 ,  H04W74/0816

    Abstract: A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A MIMO PLC transmitter device may selectively vary amounts of cyclic shift (CS) for different transmit phases based on whether an initial CS vector elicits an ACK signal back from a PLC receiver within a timeout period.

    Abstract translation: 一种PLC网络系统和方法，用于生成具有合适的前导码部分的MIMO帧的OFDM帧，其被配置为提供与传统PLC设备的向后兼容性，并且促进诸如帧检测和符号定时，信道估计和自动增益控制（AGC）的不同接收机任务，包括 在存在脉冲噪声和PLC网络的频率选择性通道的情况下进行鲁棒前同步码检测。 MIMO PLC发射机设备可以根据初始CS向量在超时时段内是否从PLC接收机返回ACK信号来选择性地改变针对不同发射阶段的循环移位量（CS）。

    PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS
    50.
    发明申请
    PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS 有权
    OFDM细胞系统的PSEUDORANDOM序列生成

    公开(公告)号：US20140270011A1

    公开(公告)日：2014-09-18

    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: H04L27/26

    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。

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