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    Time-domain windowing function
    112.
    发明授权
    Time-domain windowing function 有权
    时域窗口功能

    公开(公告)号：US09461861B2

    公开(公告)日：2016-10-04

    申请号：US14048411

    申请日：2013-10-08

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Anuj Batra ,  Timothy Mark Schmidl ,  Il Han Kim

    IPC: H04L25/49 ,  H04L27/26 ,  H04B3/54 ,  H04L25/03

    CPC classification number: H04L27/2634 ,  H04B3/542 ,  H04B2203/5433 ,  H04L25/03834

    Abstract: A smart utility network (SUN) device that includes an orthogonal frequency-division multiplexing (OFDM)-based transmitter. The OFDM-based transmitter including a signal processor to convert data from a frequency-domain to a time-domain using an inverse fast Fourier transform (IFFT) and configured to perform a time-domain windowing function based on a Hanning window on OFDM symbols.

    Abstract translation: 一种智能公用事业网络（SUN）装置，其包括基于正交频分复用（OFDM）的发射机。 基于OFDM的发射机包括信号处理器，用于使用逆快速傅里叶变换（IFFT）将数据从频域转换到时域，并被配置为基于OFDM符号上的汉宁窗执行时域加窗函数。

    Efficient encoding/decoding algorithm for MTS constrained MFSK communications
    113.
    发明授权
    Efficient encoding/decoding algorithm for MTS constrained MFSK communications 有权
    用于MTS约束MFSK通信的高效编码/解码算法

    公开(公告)号：US09455851B1

    公开(公告)日：2016-09-27

    申请号：US14969227

    申请日：2015-12-15

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Mehmet Ali Donmez ,  Anand Ganesh Dabak ,  Il Han Kim ,  Timothy Mark Schmidl

    IPC: H04B11/00 ,  H04L27/12 ,  H04L27/144

    CPC classification number: H04B11/00 ,  H04L27/122 ,  H04L27/144

    Abstract: A method of encoding a data signal is disclosed. The method includes selecting a set of M ultrasonic frequencies, wherein each of the M ultrasonic frequencies differs from an adjacent frequency by at least a first frequency spacing, and wherein M is a positive integer. The method further includes forming a trellis matrix and encoding the data signal with the trellis matrix to form a set of Q of the M ultrasonic frequencies, wherein Q is a positive integer less than M, and wherein a minimum frequency separation between any pair of the Q frequencies of the set is greater than the first frequency spacing.

    Abstract translation: 公开了一种对数据信号进行编码的方法。 该方法包括选择一组M个超声波频率，其中每个M个超声波频率与相邻频率不同至少第一频率间隔，并且其中M是正整数。 所述方法还包括形成网格矩阵并且用所述网格矩阵对所述数据信号进行编码，以形成所述M个超声波频率的Q的集合，其中Q是小于M的正整数，并且其中， 该组的Q频率大于第一频率间隔。

    POWER LINE COMMUNICATION OPERATING FREQUENCY BAND SELECTION APPARATUS, SYSTEMS AND METHODS
    114.
    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。

    Automatic gain control for power line communication
    117.
    发明授权
    Automatic gain control for power line communication 有权
    电力线通信自动增益控制

    公开(公告)号：US09203472B2

    公开(公告)日：2015-12-01

    申请号：US14510944

    申请日：2014-10-09

    Applicant: TEXAS INSTRUMENTS INCORPORATED

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

    IPC: H04B3/00 ,  H04L27/08 ,  H04B3/54

    CPC classification number: H04B3/54 ,  H04B2203/5425

    Abstract: A system includes an analog front end (AFE) unit to be coupled to a power line network, and a controller coupled to the AFE unit. More specifically, the AFE unit is to receive a packet signal from the power line network wherein, based on a first gain parameter, the AFE unit is to amplify the received packet signal. The controller is configured to calculate a root-mean-square (RMS) power of the amplified packet signal. Further, the AFE unit is to calculate a second gain parameter based on the calculated RMS power of the amplified packet signal and the first gain parameter, wherein the second gain parameter is to be used to amplify the received packet signal instead of the first gain parameter.

    Abstract translation: 系统包括要耦合到电力线网络的模拟前端（AFE）单元和耦合到AFE单元的控制器。 更具体地说，AFE单元将从电力线网络接收分组信号，其中基于第一增益参数，AFE单元将放大接收的分组信号。 控制器被配置为计算放大的分组信号的均方根（RMS）功率。 此外，AFE单元是基于所计算的放大的分组信号的RMS功率和第一增益参数来计算第二增益参数，其中第二增益参数将用于放大接收的分组信号而不是第一增益参数 。

    Cyclic shift selection for MIMO narrowband power line communications
    118.
    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）。

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