公开(公告)号：US07970067B1

公开(公告)日：2011-06-28

申请号：US11980342

申请日：2007-10-31

申请人： Tae Sung Kim ,  Sergey Zhidkov ,  Dong Hyun Kang ,  Kyu Man Lee

发明人： Tae Sung Kim ,  Sergey Zhidkov ,  Dong Hyun Kang ,  Kyu Man Lee

IPC分类号： H04K1/10

CPC分类号： H04L25/0204 ,  H04L25/0232 ,  H04L25/0236 ,  H04L2025/03414

摘要： An OFDM (orthogonal frequency division multiplexing) receiver is equalized by dividing each of a plurality of received OFDM symbols into a plurality of sub-symbols and outputting each of Fourier-converted signals corresponding to each of the sub-symbols, and estimating a channel response corresponding to each of the divided sub-symbols.

摘要翻译： OFDM（正交频分复用）接收机通过将多个接收的OFDM符号中的每一个划分为多个子符号并输出与每个子符号相对应的傅里叶变换信号，并估计信道响应 对应于每个划分的子符号。

公开(公告)号：US08850294B1

公开(公告)日：2014-09-30

申请号：US11733003

申请日：2007-04-09

申请人： Sergey Zhidkov ,  Do-jun Rhee

发明人： Sergey Zhidkov ,  Do-jun Rhee

IPC分类号： H03M13/00 ,  H03M13/03

CPC分类号： H03M13/3738 ,  H03M13/2936 ,  H03M13/2957 ,  H03M13/3776 ,  H03M13/618

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。

公开(公告)号：US08818273B2

公开(公告)日：2014-08-26

申请号：US12603955

申请日：2009-10-22

申请人： Hee-Won Jung ,  Seung-Gun Park ,  Jun-Ho Ko ,  Sang-Mook Lee ,  Gi-Sang Lee ,  Sergey Zhidkov

发明人： Hee-Won Jung ,  Seung-Gun Park ,  Jun-Ho Ko ,  Sang-Mook Lee ,  Gi-Sang Lee ,  Sergey Zhidkov

IPC分类号： H04B7/00

CPC分类号： H04L9/0861 ,  H04B1/02 ,  H04B11/00 ,  H04L2209/24 ,  H04W12/04

摘要： An apparatus and method for wireless communication using an acoustic signal in a system including a first device including a loudspeaker and a second device including a microphone. The first device generates wireless communication information, converts the wireless communication information to an acoustic signal, and transmits the acoustic signal to the second device using the loudspeaker. The second device receives the acoustic signal using the microphone, extracts the wireless communication information from the acoustic signal, generates an acknowledgment signal according to the extracted wireless communication information, and transmits the acknowledgment signal to the first device on a wireless communication channel.

摘要翻译： 一种在包括包括扬声器的第一装置和包括麦克风的第二装置的系统中使用声信号的无线通信装置和方法。 第一设备产生无线通信信息，将无线通信信息转换为声信号，并使用扬声器将声信号发送到第二设备。 第二装置使用麦克风接收声信号，从声信号中提取无线通信信息，根据所提取的无线通信信息生成确认信号，并在无线通信信道上将确认信号发送到第一设备。

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。

公开(公告)号：US08521518B2

公开(公告)日：2013-08-27

申请号：US12965295

申请日：2010-12-10

申请人： Hee-Won Jung ,  Jun-Ho Koh ,  Sang-Mook Lee ,  Gi-Sang Lee ,  Sergey Zhidkov

发明人： Hee-Won Jung ,  Jun-Ho Koh ,  Sang-Mook Lee ,  Gi-Sang Lee ,  Sergey Zhidkov

IPC分类号： G10L19/02

CPC分类号： G10L21/0232 ,  G10L19/018 ,  G10L19/02

摘要： An acoustic communication method and device are provided that filter an audio signal to attenuate a high frequency section of the audio signal. A residual signal is generated that corresponds to a difference between the audio signal and the filtered signal. A psychoacoustic mask is generated for the audio signal based on a predetermined psychoacoustic model. A psychoacoustic spectrum mask is generated by combining the residual signal with the psychoacoustic mask, an acoustic communication signal is generating by modulating digital data according to the acoustic signal spectrum mask, the acoustic communication signal is combined with the filtered signal, and radiating, by a speaker, the combined acoustic communication signal and the filtered signal in a form of sound waves.

摘要翻译： 提供一种声音通信方法和装置，其对音频信号进行滤波以衰减音频信号的高频部分。 产生对应于音频信号和滤波信号之间的差的残余信号。 基于预定的心理声学模型，为音频信号生成心理声学掩模。 通过将残留信号与心理声学掩模组合来产生心理声谱谱掩模，根据声信号谱掩模通过调制数字数据产生声通信信号，将声通信信号与滤波信号组合，并通过 扬声器，组合声通信信号和声波形式的滤波信号。

公开(公告)号：US08331519B2

公开(公告)日：2012-12-11

申请号：US12430691

申请日：2009-04-27

申请人： Sergey Zhidkov ,  Jun Ho Huh ,  Ki Seop Kwon

发明人： Sergey Zhidkov ,  Jun Ho Huh ,  Ki Seop Kwon

IPC分类号： H04L7/00

CPC分类号： G01R23/15 ,  G01R23/10 ,  H03L7/087 ,  H03L7/091 ,  H03L7/093 ,  H03L7/0998 ,  H04L7/0334 ,  H04L7/10

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。

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

IPC分类号： H04J11/00 ,  H04L25/03 ,  H04N7/015 ,  H04B1/69 ,  H04L27/28

CPC分类号： H04L25/03292 ,  H04L25/03184 ,  H04L2025/03414

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。

公开(公告)号：US09268006B2

公开(公告)日：2016-02-23

申请号：US13603960

申请日：2012-09-05

申请人： Kyong-ha Park ,  Hyun-su Hong ,  Sergey Zhidkov ,  Vladimir Chebaev

发明人： Kyong-ha Park ,  Hyun-su Hong ,  Sergey Zhidkov ,  Vladimir Chebaev

IPC分类号： H04M11/04 ,  H04M3/493 ,  H04W24/00 ,  G01S5/00 ,  G01S5/18

CPC分类号： G01S5/0036 ,  G01S5/18 ,  H04W4/029 ,  H04W4/043 ,  H04W4/08

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。

公开(公告)号：US08116393B2

公开(公告)日：2012-02-14

申请号：US12017924

申请日：2008-01-22

申请人： Hyun Bae Jeon ,  Sergey Zhidkov

发明人： Hyun Bae Jeon ,  Sergey Zhidkov

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。

公开(公告)号：US20110243212A1

公开(公告)日：2011-10-06

申请号：US13027710

申请日：2011-02-15

申请人： DoHan Kim ,  Beom Kon Kim ,  Sergey Zhidkov

发明人： DoHan Kim ,  Beom Kon Kim ,  Sergey Zhidkov

IPC分类号： H04L27/01

CPC分类号： H04L25/03057 ,  H04L25/03203 ,  H04L2025/03382 ,  H04L2025/03484 ,  H04L2025/03617 ,  H04L2025/037

摘要： A symbol sequence corresponding to a vestigial sideband (VSB) signal is divided into a plurality of sections, respective ones of which correspond to respective time periods. Individual ones of the sections are recursively adaptively equalized to produce respective equalized sections. A bit stream is constructed from the equalized sections.

摘要翻译： 对应于残留边带（VSB）信号的符号序列被划分为多个部分，其中各个对应于各个时间段。 这些部分中的各个部分被递归地自适应地均衡以产生相应的相等部分。 从均衡部分构建位流。