公开(公告)号：US07738600B2

公开(公告)日：2010-06-15

申请号：US11894102

申请日：2007-08-20

Applicant: Younggyun Kim ,  Jaekyun Moon

Inventor： Younggyun Kim ,  Jaekyun Moon

IPC: H04L27/00 ,  H03D3/24 ,  H04L7/00

CPC classification number: H04L27/2662 ,  H04L25/03159 ,  H04L27/2657 ,  H04L27/2676 ,  H04L2025/03414

Abstract: Digital communication signals that encode information in the phase may be susceptible to phase error from many sources. A device corrects for carrier and sampling phase errors, as well as additive phase noise. A digital phase locked loop simultaneously tracks the carrier phase error and the sampling phase error, and corrects the signal in the frequency domain. The device may use the sampling phase error to advance or delay the sampling window used to convert the signal from the time domain to the frequency domain.

Abstract translation: 在该阶段编码信息的数字通信信号可能容易受到许多来源的相位误差的影响。 设备校正载波和采样相位误差以及相位相位噪声。 数字锁相环同时跟踪载波相位误差和采样相位误差，并校正频域中的信号。 该装置可以使用采样相位误差推进或延迟用于将来自时域的信号转换到频域的采样窗口。

公开(公告)号：US07190748B2

公开(公告)日：2007-03-13

申请号：US10144445

申请日：2002-05-10

Applicant: Younggyun Kim ,  Jaekyun Moon

Inventor： Younggyun Kim ,  Jaekyun Moon

IPC: H04L27/08 ,  H04L1/02 ,  H04B7/10

CPC classification number: H04W28/18 ,  H04B7/0848 ,  H04B7/0854 ,  H04B7/0857 ,  H04L1/06 ,  H04L27/2657 ,  H04L27/2662 ,  H04L27/2675 ,  H04W56/00 ,  H04W84/12

Abstract: A digital front-end for a wireless communication system incorporates gain control, signal detection, frame synchronization and carrier frequency offset (CFO) estimation and correction features configured for use with multiple receive antennas. The digital front-end may be applied to a wireless communication system in which transmitted signals carry a repeated signal pattern, such as orthogonal frequency division multiplexing (OFDM) systems. An example of a repeated signal pattern is the preamble of a signal transmitted according to the IEEE 802.11a wireless local area network (WLAN) standard. The signal detection, frame synchronization, and CFO estimation techniques make use of signals received from multiple antenna paths to provide enhanced performance. The gain control feature may be configured to adjust the gain in steps. The frame synchronization technique may operate as a function of gain control, handling the input signal differently before and after gain adjustment.

Abstract translation: 用于无线通信系统的数字前端包括配置为与多个接收天线一起使用的增益控制，信号检测，帧同步和载波频率偏移（CFO）估计和校正特征。 数字前端可以应用于其中发送的信号携带重复信号模式的无线通信系统，例如正交频分复用（OFDM）系统。 重复信号模式的示例是根据IEEE 802.11a无线局域网（WLAN）标准发送的信号的前导码。 信号检测，帧同步和CFO估计技术利用从多个天线路径接收的信号来提供增强的性能。 增益控制功能可以被配置为逐步调整增益。 帧同步技术可以作为增益控制的功能来操作，在增益调整之前和之后处理输入信号不同。

公开(公告)号：US20060258304A1

公开(公告)日：2006-11-16

申请号：US11449068

申请日：2006-06-08

Applicant: Jaekyun Moon ,  Younggyun Kim ,  Barrett Brickner ,  Paul Edwards ,  Michael Butenhoff

Inventor： Jaekyun Moon ,  Younggyun Kim ,  Barrett Brickner ,  Paul Edwards ,  Michael Butenhoff

IPC: H04B1/02

CPC classification number: H04L1/0001 ,  H04B7/0811 ,  H04B7/0814 ,  H04L1/0015 ,  H04L1/206

Abstract: An apparatus for dynamic diversity signal reception based upon receiver-side link quality assessments includes two or more antennae. At least one switch is connected to the two or more antennae. A dynamic diversity controller is connected to the at least one switch. The dynamic diversity controller includes a link quality assessor to assess link quality and generate a link characterization value. A diversity configuration selector, responsive to the link characterization value, selectively activates the at least one switch to implement a dynamic diversity configuration. The link quality assessor includes a signal strength analyzer, a modem detector, and/or a MAC layer analyzer to assess the received signal and generate the link characterization value.

公开(公告)号：US07099267B2

公开(公告)日：2006-08-29

申请号：US10112916

申请日：2002-03-29

Applicant: Jaekyun Moon

Inventor： Jaekyun Moon

IPC: H04J11/00 ,  H04Q7/24

CPC classification number: H04L27/2647 ,  H04L5/0048 ,  H04L25/0228 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

Abstract: A technique for enhanced frequency domain equalization in an OFDM communication receiver enables derivation of a more accurate estimate of channel gain fluctuation by adding an additional frequency tone observation to the estimate. For example, the technique may involve estimation of an unknown, complex, channel-induced gain A based on observation of complex amplitude values for first and second preamble symbols transmitted in an OFDM frame, plus the complex amplitude value for a signal field in the OFDM frame. The enhanced frequency domain equalization technique may be especially useful in a network conforming to the IEEE 802.11a standard.

Abstract translation: 在OFDM通信接收机中用于增强频域均衡的技术使得能够通过向估计添加额外的频率调节观测值来导出信道增益波动的更准确的估计。 例如，该技术可以包括基于在OFDM帧中发送的第一和第二前导码符号的复振幅值的观测以及OFDM中的信号场的复振幅值来估计未知的，复杂的信道诱导增益A. 帧。 增强型频域均衡技术在符合IEEE 802.11a标准的网络中尤其有用。

公开(公告)号：US20060164263A1

公开(公告)日：2006-07-27

申请号：US11302381

申请日：2005-12-14

Applicant: Jihoon Park ,  Jaekyun Moon ,  Jun Lee

Inventor： Jihoon Park ,  Jaekyun Moon ,  Jun Lee

IPC: H03M7/00

CPC classification number: H03M5/145 ,  H03M13/09 ,  H03M13/31 ,  H03M13/6343

Abstract: A method and an apparatus for encoding and decoding a modulation code are provided. The method includes: adding an error detection bit(s) to source information; performing k-constraint coding by inserting an error pattern that can be detected using an error detection code into a data stream that violates a k-constraint for a run length limited (RLL) code in a data stream comprising the error detection bit(s) and the source information, and recording the data stream after being k-constraint coded onto a recording medium; and reading the data stream recorded onto the recording medium and determining whether an error is present in the data stream.

公开(公告)号：US08826096B2

公开(公告)日：2014-09-02

申请号：US13473800

申请日：2012-05-17

Applicant: Jaekyun Moon ,  Soonyoung Kang

Inventor： Jaekyun Moon ,  Soonyoung Kang

IPC: H03M13/00 ,  H03M13/03 ,  H04B3/46 ,  H04L5/12 ,  H04L27/06 ,  H03M13/11 ,  H03M13/37 ,  H03M13/29 ,  H04L1/00

CPC classification number: H03M13/1111 ,  H03M13/1102 ,  H03M13/1162 ,  H03M13/29 ,  H03M13/2957 ,  H03M13/2963 ,  H03M13/3715 ,  H03M13/3753 ,  H03M13/3761 ,  H03M13/616 ,  H04L1/0009 ,  H04L1/0061 ,  H04L1/0065

Abstract: Provided are a method of decoding an LDPC code for producing several different decoders using a parity-check matrix of the LDPC code, and an LDPC code system including the same. The system includes: an LDPC encoder outputting an LDPC codeword through a channel; a first LDPC decoder decoding the LDPC codeword received through the channel, and when the decoding has failed in a second LDPC decoder, decoding the LDPC codeword according to original parity check matrix of the LDPC codeword, using soft information newly generated after the decoding is ended in the second LDPC decoder; and the second LDPC decoder, when the decoding has failed in the first LDPC decoder, receiving the soft information on each bit from the first LDPC, and decoding the LDPC codeword according to a new parity-check matrix produced from the parity-check matrix of the LDPC codeword using the received soft information on each bit.

Abstract translation: 提供了一种使用LDPC码的奇偶校验矩阵来产生几个不同解码器的LDPC码以及包括该LDPC码的LDPC码系统的方法。 该系统包括：通过信道输出LDPC码字的LDPC编码器; 解码通过信道接收的LDPC码字的第一LDPC解码器，以及当在第二LDPC解码器中解码失败时，使用解码结束后新生成的软信息，根据LDPC码字的原始奇偶校验矩阵对LDPC码字进行解码 在第二LDPC解码器中; 以及所述第二LDPC解码器，当所述第一LDPC解码器中的解码失败时，从所述第一LDPC接收关于每个比特的软信息，并且根据从所述第一LDPC解码矩阵的奇偶校验矩阵产生的新的奇偶校验矩阵对所述LDPC码字进行解码 使用所接收的每个比特的软信息的LDPC码字。

公开(公告)号：US08386882B2

公开(公告)日：2013-02-26

申请号：US13543096

申请日：2012-07-06

Applicant: Jaekyun Moon ,  Hemant Thapar

Inventor： Jaekyun Moon ,  Hemant Thapar

IPC: H03M13/00

CPC classification number: H03M13/251 ,  G06F11/1012 ,  H03M13/152

Abstract: A signal is encoded by receiving input data. A first portion of the input data is encoded to obtain a first set of encoded data. At least some part of the input data is processed to determine which one of a plurality of subsets the input data corresponds to. In the event the input data corresponds to a first subset having a greater signal margin (SM) than a second subset, the first set of encoded data and a second portion of the input data are output. In the event the input data corresponds to the second subset, the second portion of the input data is encoded to obtain a second set of encoded data and the first set of encoded data and the second set of encoded data are output.

Abstract translation: 通过接收输入数据对信号进行编码。 编码输入数据的第一部分以获得第一组编码数据。 处理输入数据的至少一部分以确定输入数据对应于多个子集中的哪一个。 在输入数据对应于具有比第二子集更大的信号余量（SM）的第一子集的情况下，输出第一组编码数据和输入数据的第二部分。 在输入数据对应于第二子集的情况下，输入数据的第二部分被编码以获得第二组编码数据，并输出第一组编码数据和第二组编码数据。

公开(公告)号：US20120278680A1

公开(公告)日：2012-11-01

申请号：US13543096

申请日：2012-07-06

Applicant: Jaekyun Moon ,  Hemant Thapar

Inventor： Jaekyun Moon ,  Hemant Thapar

IPC: H03M13/29 ,  G06F11/10

CPC classification number: H03M13/251 ,  G06F11/1012 ,  H03M13/152

Abstract: A signal is encoded by receiving input data. A first portion of the input data is encoded to obtain a first set of encoded data. At least some part of the input data is processed to determine which one of a plurality of subsets the input data corresponds to. In the event the input data corresponds to a first subset having a greater signal margin (SM) than a second subset, the first set of encoded data and a second portion of the input data are output. In the event the input data corresponds to the second subset, the second portion of the input data is encoded to obtain a second set of encoded data and the first set of encoded data and the second set of encoded data are output.

Abstract translation: 通过接收输入数据对信号进行编码。 编码输入数据的第一部分以获得第一组编码数据。 处理输入数据的至少一部分以确定输入数据对应于多个子集中的哪一个。 在输入数据对应于具有比第二子集更大的信号余量（SM）的第一子集的情况下，输出第一组编码数据和输入数据的第二部分。 在输入数据对应于第二子集的情况下，输入数据的第二部分被编码以获得第二组编码数据，并输出第一组编码数据和第二组编码数据。

公开(公告)号：US07904794B2

公开(公告)日：2011-03-08

申请号：US12623540

申请日：2009-11-23

Applicant: Jihoon Park ,  Jaekyun Moon ,  Jun Lee

Inventor： Jihoon Park ,  Jaekyun Moon ,  Jun Lee

IPC: H03M13/00

CPC classification number: H03M13/033 ,  H03M13/09

Abstract: A method of constructing an effective generator polynomial for error correction by which a unique set of syndromes for each error event is produced is provided. The method includes preparing a set of dominant error events from the intersymbol interference characteristics of media; and generating a codeword from the data using a non-primitive generator polynomial that produces a unique syndrome set which completely specifies each dominant error event.

Abstract translation: 提供一种构建用于纠错的有效生成多项式的方法，通过该方法产生用于每个错误事件的一组唯一的综合征。 该方法包括从媒体的符号间干扰特性准备一组主要的误差事件; 以及使用产生完全指定每个主要错误事件的唯一校正子集的非原始生成多项式从数据生成码字。

公开(公告)号：US07890841B2

公开(公告)日：2011-02-15

申请号：US11598806

申请日：2006-11-14

Applicant: Jun Lee ,  Jihoon Park ,  Jaekyun Moon

Inventor： Jun Lee ,  Jihoon Park ,  Jaekyun Moon

IPC: H03M13/00

CPC classification number: G11B20/10009 ,  G11B20/10055 ,  G11B20/1833 ,  G11B2020/1836 ,  G11B2020/1863 ,  H03M13/41 ,  H04L1/0054 ,  H04L1/0064

Abstract: In an error correction method, a codeword is transmitted through a noisy communication channel and detected by a receiving device. An error detection code is then applied to the detected codeword to generate a syndrome. Where the syndrome is not all zero, the codeword is determined to contain some error. Accordingly, the method computes a set of potential error start positions for a plurality of error events based on a syndrome value corresponding to the syndrome. Next, a confidence value is computed for each of the plurality of error events at each of the potential error start positions in the refined set, and finally, a most likely error event in the detected codeword is corrected based on an error event and corresponding potential error start position having the highest confidence value.

Abstract translation: 在纠错方法中，通过噪声通信信道发送码字，并由接收装置进行检测。 然后将错误检测码应用于检测到的码字以产生综合征。 在不完全为零的情况下，确定码字包含一些错误。 因此，该方法基于与该综合征对应的综合征值计算多个错误事件的潜在错误开始位置的集合。 接下来，针对精细集合中的每个潜在错误开始位置处的多个错误事件中的每一个计算置信度值，最后，基于错误事件和相应的电位来校正检测到的码字中最可能的错误事件 误差开始位置具有最高的置信度值。