中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

2276 records (took 0.131 seconds)

    Systems and methods to mitigate phase noise
    73.
    发明授权
    Systems and methods to mitigate phase noise 有权
    降低相位噪声的系统和方法

    公开(公告)号：US09137065B2

    公开(公告)日：2015-09-15

    申请号：US14132637

    申请日：2013-12-18

    Applicant: QUALCOMM Incorporated

    Inventor： Maxim Gotman ,  Ziv Alina

    IPC: H04L27/156 ,  H04L1/00 ,  H04L1/20

    CPC classification number: H04L27/156 ,  H04L1/005 ,  H04L1/205

    Abstract: Methods, systems, and devices are described for mitigating phase noise. An output of a decoder is utilized to generate an estimation of a plurality of transmitted symbols. One or more phase errors of a plurality of received symbols are generated. The one or more phase errors are based at least in part on the estimation of the plurality of transmitted symbols. The one or more phase errors are generated by comparing angles between the plurality of received symbols and the estimation of the plurality of transmitted symbols. The output of the decoder used to generate the estimation is a plurality of a posteriori log-likelihood ratios (LLRs) of a plurality of transmitted bits. The estimation is generated by performing hard decision decoding on the output of the decoder and remodulating the hard decision decoding according to the modulation used by a transmitter on the plurality of transmitted bits.

    Abstract translation: 描述了减轻相位噪声的方法，系统和设备。 利用解码器的输出来生成多个发送符号的估计。 生成多个接收符号的一个或多个相位误差。 一个或多个相位误差至少部分地基于多个发射符号的估计。 通过比较多个接收符号之间的角度和多个发射符号的估计来产生一个或多个相位误差。 用于生成估计的解码器的输出是多个发送比特的多个后验对数似然比（LLR）。 通过对解码器的输出执行硬判决解码并根据发送器在多个发送位上使用的调制来重新调制硬判决解码来产生估计。

    System and method for acceleration effect correction using turbo-encoded data with cyclic redundancy check
    75.
    发明授权
    System and method for acceleration effect correction using turbo-encoded data with cyclic redundancy check 有权
    使用具有循环冗余校验的turbo编码数据进行加速度效应校正的系统和方法

    公开(公告)号：US09130595B1

    公开(公告)日：2015-09-08

    申请号：US14073950

    申请日：2013-11-07

    Applicant: The United States of America as represented by the Secretary of the Navy

    Inventor： Gregory K. Fleizach ,  Gary Lau

    IPC: H03M13/09 ,  H03M13/29 ,  H04L1/00

    CPC classification number: H04L1/005 ,  H03M13/09 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/0061 ,  H04L2027/0026

    Abstract: A method involves receiving at least one analog signal from a transmitter, converting the analog signal to digital waveform data representing the analog signal and storing the digital waveform data in a first memory storage area. The digital waveform data includes cyclic redundancy check (CRC) error-checking code and informational message data, and is modulated by an unknown frequency rate parameter. A chirp adjustment function is performed that includes multiplying the digital waveform data by a non-linear data array to correct for the unknown frequency rate parameter. An error-checking function is performed using the CRC error-checking code. If an error is found, the method involves iteratively performing the chirp adjustment function and the error-checking function. The method may be implemented in a receiver in a mobile communications system to correct for acceleration effects of the receiver.

    Abstract translation: 一种方法包括从发射机接收至少一个模拟信号，将模拟信号转换成表示模拟信号的数字波形数据，并将数字波形数据存储在第一存储器存储区域中。 数字波形数据包括循环冗余校验（CRC）错误检查码和信息消息数据，并且由未知的频率参数调制。 执行线性调频功能，其包括将数字波形数据乘以非线性数据阵列以校正未知频率参数。 使用CRC错误检查代码执行错误检查功能。 如果发现错误，该方法包括迭代执行啁啾调整功能和错误检查功能。 该方法可以在移动通信系统中的接收机中实现，以校正接收机的加速效应。

    Wireless communications device with multiple trellis decoders and related methods
    77.
    发明授权
    Wireless communications device with multiple trellis decoders and related methods 有权
    具有多个网格解码器和相关方法的无线通信设备

    公开(公告)号：US09112654B2

    公开(公告)日：2015-08-18

    申请号：US13210600

    申请日：2011-08-16

    Applicant: Joseph B. Shaver ,  John Wesley Nieto ,  Michael Patrick Snook

    Inventor： Joseph B. Shaver ,  John Wesley Nieto ,  Michael Patrick Snook

    IPC: H03M13/25 ,  H04L1/00 ,  H03M13/53

    CPC classification number: H04L1/0043 ,  H04L1/005 ,  H04L1/0054

    Abstract: A wireless communications device includes a receiver, and a decoder coupled downstream from the receiver. The decoder is configured to alternatively decode a first signal using a first trellis state transition map including first valid transitions, the first signal having a first modulation order, and second signals using second trellis state transition maps including respective second valid transitions defined from the first valid transitions. The second signals have respective modulation orders less than the first modulation order.

    Abstract translation: 无线通信设备包括接收机和耦合在接收机下游的解码器。 解码器被配置为使用包括第一有效转换的第一格状态转换映射来替换第一信号，第一有效转换，具有第一调制阶的第一信号和使用第二格状态转换映射的第二信号，所述第二格状态转换映射包括从第一有效转换定义的第二有效转换 转换 第二信号具有小于第一调制阶数的相应调制阶数。

    Likelihood weighting circuit
    78.
    发明授权
    Likelihood weighting circuit 有权
    似然加权电路

    公开(公告)号：US09100157B2

    公开(公告)日：2015-08-04

    申请号：US14532027

    申请日：2014-11-04

    Applicant: FUJITSU LIMITED

    Inventor： Masataka Umeda

    IPC: H04L27/06 ,  H04L1/00 ,  H04L27/26

    CPC classification number: H04L1/0054 ,  H04L1/005 ,  H04L27/2647

    Abstract: A likelihood weighting circuit includes a weighting part assigning a weight to a first soft-decision likelihood for a subcarrier in a received signal based on a power value of the received signal or a modulation error ratio of the subcarrier, a first variance calculator calculating a variance of the power value, a second variance calculator calculating a variance of the modulation error ratio, a likelihood measurement part measuring a distribution of a second soft-decision likelihood obtained by assigning the weight to the first soft-decision likelihood, a controller computing a first relaxing level of the power value and a second relaxing level of the modulation error ratio based on the respective variances, and a value of the second soft-decision likelihood, a first normalization processor normalizing the power value based on the first relaxing level, and a second normalization processor normalizing the modulation error ratio based on the second relaxing level.

    Abstract translation: 似然加权电路包括：加权部分，基于接收信号的功率值或子载波的调制误差比，将接收信号中的子载波的第一软判决似然度的加权分配给第一方差计算器，计算方差 功率值的第二方差计算器，计算调制误差比的方差的第二方差计算器，测量通过将权重分配给第一软判决似然率获得的第二软判决似然率的分布的似然度量部分，控制器计算第一 基于各个方差的功率值的松弛水平和调制误差比的第二放松水平，以及第二软判决可能性的值，基于第一放松水平对功率值进行归一化的第一归一化处理器，以及 第二归一化处理器基于第二放松水平对调制误差比进行归一化。

    Receiving Method, Apparatus, and System in Cooperative Communications
    80.
    发明申请
    Receiving Method, Apparatus, and System in Cooperative Communications 审中-公开
    接收方式，仪器和系统的合作通信

    公开(公告)号：US20150172002A1

    公开(公告)日：2015-06-18

    申请号：US14561220

    申请日：2014-12-05

    Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

    Inventor： Rongdao Yu ,  Sheng Liu

    IPC: H04L1/00

    CPC classification number: H04L1/0054 ,  H04L1/005 ,  H04L1/0066 ,  H04L1/0076 ,  H04L1/0077 ,  H04L2001/0097

    Abstract: The application provides a receiving method in cooperative communications. A signal-receiving node demodulates a first signal received from a local end to obtain a first log-likelihood ratio. The signal-receiving node further demodulates a second signal received from a relay node to obtain a second log-likelihood ratio. The second signal is a signal obtained by the relay node through network coding the first signal and a third signal received from a peer end. The signal-receiving node calculates a prior log-likelihood ratio according to the first log-likelihood ratio and the second log-likelihood ratio, and decodes the second signal by using the prior log-likelihood ratio to obtain the third signal.

    Abstract translation: 该应用程序提供了一种合作通信中的接收方法。 信号接收节点解调从本端接收到的第一信号以获得第一对数似然比。 信号接收节点进一步解调从中继节点接收的第二信号，以获得第二对数似然比。 第二信号是由中继节点通过对第一信号进行网络编码而获得的信号和从对端接收到的第三信号。 信号接收节点根据第一对数似然比和第二对数似然比计算先验对数似然比，并且通过使用先前的对数似然比对第二信号进行解码以获得第三信号。

Patent Agency Ranking