Decoding apparatus for digital communications and method for using the same
    11.
    发明授权
    Decoding apparatus for digital communications and method for using the same 有权
    数字通信用解码装置及其使用方法

    公开(公告)号:US08850294B1

    公开(公告)日:2014-09-30

    申请号:US11733003

    申请日:2007-04-09

    IPC分类号: H03M13/00 H03M13/03

    摘要: A decoding apparatus and method for estimating a reliability value by detecting uncorrected packet errors. The decoding apparatus includes a hard-decision unit and a reliability determination unit. The hard-decision unit performs hard-decision on a soft-input of a code. The reliability determination unit generates a reliability estimation value of the hard-decision result according to whether a packet error exists in the hard-decision result. The hard-decision unit performs hard-decision in response to the reliability estimation value.

    摘要翻译: 一种用于通过检测未校正的分组错误来估计可靠性值的解码装置和方法。 解码装置包括硬判决单元和可靠性确定单元。 硬判决单元对代码的软输入执行硬判决。 可靠性确定单元根据硬判决结果中是否存在分组错误来生成硬判决结果的可靠性估计值。 硬判决单元响应于可靠性估计值执行硬判决。

    Apparatus and Method for Generating Signatures of Acoustic Signal and Apparatus for Acoustic Signal Identification
    12.
    发明申请
    Apparatus and Method for Generating Signatures of Acoustic Signal and Apparatus for Acoustic Signal Identification 审中-公开
    声信号识别装置和方法,声信号识别装置

    公开(公告)号:US20140074469A1

    公开(公告)日:2014-03-13

    申请号:US14020844

    申请日:2013-09-08

    申请人: Sergey Zhidkov

    发明人: Sergey Zhidkov

    IPC分类号: G10L15/08

    CPC分类号: G10L15/08 G10L25/18 G10L25/54

    摘要: Method and apparatus for generating compact signatures of acoustic signal are disclosed. A method of generating acoustic signal signatures comprises the steps of dividing input signal into multiple frames, computing Fourier transform of each frame, computing difference between non-negative Fourier transform output values for the current frame and non-negative Fourier transform output values for one of previous frames, combining difference values into subgroups, accumulating difference values within a subgroup, combining accumulated subgroup values into groups, and finding an extreme value within each group.

    摘要翻译: 公开了用于产生声信号的紧凑签名的方法和装置。 一种产生声信号特征的方法包括以下步骤:将输入信号分成多个帧,计算每帧的傅里叶变换,计算当前帧的非负傅立叶变换输出值和非负傅里叶变换输出值之差 先前的帧,将差分值组合成子组,在子组内累积差值,将累加的子组值组合成组,并在每组中找到极值。

    Frequency detector and phase locked loop having the same
    13.
    发明授权
    Frequency detector and phase locked loop having the same 失效
    频率检测器和锁相环具有相同的功能

    公开(公告)号:US08331519B2

    公开(公告)日:2012-12-11

    申请号:US12430691

    申请日:2009-04-27

    IPC分类号: H04L7/00

    摘要: A frequency detector includes an error measurement unit measuring a time interval between zero-crossing points of an input signal that is modulated. An error conversion unit quantizes the measured time interval using one of modulation time intervals. An error calculation unit calculates a frequency error based upon a difference between the measured time interval and the quantized time interval. An error generation control unit controls whether to output the frequency error based upon the quantized time interval, the calculated frequency error, and a predetermined critical value.

    摘要翻译: 频率检测器包括测量被调制的输入信号的过零点之间的时间间隔的误差测量单元。 误差转换单元使用调制时间间隔之一量化测量的时间间隔。 误差计算单元基于测量的时间间隔和量化时间间隔之间的差来计算频率误差。 误差产生控制单元基于量化时​​间间隔,计算出的频率误差和预定临界值来控制是否输出频率误差。

    Apparatus and method for direct measurement of channel state for coded orthogonal frequency division multiplexing receiver
    14.
    发明申请
    Apparatus and method for direct measurement of channel state for coded orthogonal frequency division multiplexing receiver 有权
    用于直接测量编码正交频分复用接收机的信道状态的装置和方法

    公开(公告)号:US20050008084A1

    公开(公告)日:2005-01-13

    申请号:US10798946

    申请日:2004-03-12

    申请人: Sergey Zhidkov

    发明人: Sergey Zhidkov

    摘要: An apparatus and method for direct measurement of the channel state of a receiver, such as an OFDM (Orthogonal Frequency Division Multiplexing) receiver. The apparatus adapts a frequency selective channel using a squared Euclidean distance between a received signal value and a de-mapped value for measurement of the channel state and estimates the CSI (Channel State Information) which is also suitable for signal processing with co-channel interference. The estimated CSI may be used in a bit metric calculation of subsequent error correction decoders, such as a Viterbi decoder, to increase system SNR (Signal-to-Noise Ratio) gain. Because receiving equipment, such as digital televisions, receive clearer DVB-T (Terrestrial Digital Video Broadcasting) signals, clearer pictures with less distortion can be displayed, for example, on the digital television.

    摘要翻译: 用于直接测量诸如OFDM(正交频分复用)接收机的接收机的信道状态的装置和方法。 该装置使用接收信号值和解映射值之间的平方欧几里德距离来调整频率选择信道,以测量信道状态,并估计也适用于具有同信道干扰的信号处理的CSI(信道状态信息) 。 估计的CSI可以用于随后的纠错解码器(例如维特比解码器)的比特度量计算中,以增加系统SNR(信噪比)增益。 由于诸如数字电视机等接收设备能够收到更清晰的DVB-T(地面数字视频广播)信号,因此可以在数字电视机上显示更少的失真图像。

    Method and apparatus for providing information based on a location
    15.
    发明授权
    Method and apparatus for providing information based on a location 有权
    基于位置提供信息的方法和装置

    公开(公告)号:US09268006B2

    公开(公告)日:2016-02-23

    申请号:US13603960

    申请日:2012-09-05

    摘要: A method and apparatus for providing location information are provided. The method includes receiving data including reference sound information from at least one external device; receiving location information request data including sound information from the mobile device; detecting similar reference sound information to the sound information based on a comparison of the sound information to the reference sound information; determining location in formation of an external device that transmitted the similar reference sound information; and transmitting the determined location information to the mobile device.

    摘要翻译: 提供了一种用于提供位置信息的方法和装置。 该方法包括从至少一个外部设备接收包括参考声音信息的数据; 从移动设备接收包括声音信息的位置信息请求数据; 基于声音信息与参考声音信息的比较,检测与声音信息相似的参考声音信息; 确定形成发送相似参考声音信息的外部设备的位置; 以及将所确定的位置信息发送到所述移动设备。

    Method and apparatus for estimating channel state information
    16.
    发明授权
    Method and apparatus for estimating channel state information 有权
    用于估计信道状态信息的方法和装置

    公开(公告)号:US08116393B2

    公开(公告)日:2012-02-14

    申请号:US12017924

    申请日:2008-01-22

    IPC分类号: H04L27/28

    CPC分类号: H04L27/2647 H04B17/345

    摘要: An orthogonal frequency division multiplexing (OFDM) receiver includes a n average power calculation unit and an output unit. The average power calculation unit calculates and outputs a first average power of a null symbol section of each transmitted frame output from an OFDM transmitter and calculates and outputs second average powers of sub-carriers that correspond to each null symbol section. The output unit compares the first average power and the second average powers, to perform a reciprocal transformation on difference values of the first average power and each of the second average powers based on results of the comparisons, and to store and output reciprocally transformed values as channel state information.

    摘要翻译: 正交频分复用(OFDM)接收机包括n个平均功率计算单元和输出单元。 平均功率计算单元计算并输出从OFDM发送器输出的每个发送帧的零符号部分的第一平均功率,并计算并输出与每个空符号部分对应的子载波的第二平均功率。 输出单元比较第一平均功率和第二平均功率,以基于比较结果对第一平均功率和每个第二平均功率的差值进行倒数变换,并将相互变换的值存储和输出为 频道状态信息。

    Channel state determination method and channel state generator in receiver
    18.
    发明授权
    Channel state determination method and channel state generator in receiver 失效
    接收机中的信道状态确定方法和信道状态发生器

    公开(公告)号:US07715496B2

    公开(公告)日:2010-05-11

    申请号:US11017706

    申请日:2004-12-22

    IPC分类号: H04L27/06

    摘要: Exemplary embodiments of the present invention provide a receiver, a generator, an error-averager, and a determiner and methods for the same. In exemplary embodiments of the present invention, cyclical characteristics of a signal may be used to obtain an improved signal-to-noise ratio (SNR). Exemplary embodiments of the generator may generate a signal output from an equalizer and may transmit the signal to a decoder, which may calculate a metric. The signal may be proportional to the reliability of a symbol.

    摘要翻译: 本发明的示例性实施例提供接收机,发生器,误差平均器以及用于其的确定器及其方法。 在本发明的示例性实施例中,可以使用信号的循环特性来获得改善的信噪比(SNR)。 发生器的示例性实施例可以产生从均衡器输出的信号,并且可以将信号发送到解码器,解码器可以计算度量。 信号可能与符号的可靠性成正比。

    Frequency Detector and Phase Locked Loop Having the Same
    19.
    发明申请
    Frequency Detector and Phase Locked Loop Having the Same 失效
    频率检测器和相位锁相环

    公开(公告)号:US20090310730A1

    公开(公告)日:2009-12-17

    申请号:US12430691

    申请日:2009-04-27

    摘要: A frequency detector includes an error measurement unit measuring a time interval between zero-crossing points of an input signal that is modulated. An error conversion unit quantizes the measured time interval using one of modulation time intervals. An error calculation unit calculates a frequency error based upon a difference between the measured time interval and the quantized time interval. An error generation control unit controls whether to output the frequency error based upon the quantized time interval, the calculated frequency error, and a predetermined critical value.

    摘要翻译: 频率检测器包括测量被调制的输入信号的过零点之间的时间间隔的误差测量单元。 误差转换单元使用调制时间间隔之一量化测量的时间间隔。 误差计算单元基于测量的时间间隔和量化时间间隔之间的差来计算频率误差。 误差产生控制单元基于量化时​​间间隔,计算出的频率误差和预定临界值来控制是否输出频率误差。

    METHOD FOR INTER-CARRIER INTERFERENCE CANCELLATION AND EQUALIZATION METHOD, APPARATUS, AND OFDM RECEIVER USING THE METHOD
    20.
    发明申请
    METHOD FOR INTER-CARRIER INTERFERENCE CANCELLATION AND EQUALIZATION METHOD, APPARATUS, AND OFDM RECEIVER USING THE METHOD 有权
    使用该方法的用于帧间干扰消除和均衡方法,装置和OFDM接收机的方法

    公开(公告)号:US20090161779A1

    公开(公告)日:2009-06-25

    申请号:US12257723

    申请日:2008-10-24

    IPC分类号: H04L25/08 H04L27/28

    摘要: An inter-carrier interference ICI cancellation method of a kth sub-carrier of an orthogonal frequency division multiplexing OFDM receiving signal (k is a natural number greater than 1 and less than or equal to n, n is a number of sub-carriers) includes canceling an inter-carrier interference element produced by at least one sub-carrier among inter-carrier interference elements of the kth sub-carrier by a decision feedback equalization DFE method, and canceling another inter-carrier interference element produced by at least another sub-carrier among inter-carrier interference elements of the kth sub-carrier by a linear minimum mean square error equalization LMMSE method.

    摘要翻译: 正交频分复用OFDM接收信号(k是大于1且小于等于n的自然数,n是子载波数)的第k个子载波的载波间干扰ICI消除方法包括 通过判决反馈均衡DFE方法消除由第k个子载波的载波间干扰元素中的至少一个子载波产生的载波间干扰元素,并且消除由至少另一子载波产生的另一个载波间干扰元素, 载波在第k个子载波的载波间干扰元素中通过线性最小均方误差均衡LMMSE方法。