公开(公告)号：US08111770B1

公开(公告)日：2012-02-07

申请号：US11174423

申请日：2005-07-01

申请人： Jaekyun Moon ,  Hui Jin

发明人： Jaekyun Moon ,  Hui Jin

IPC分类号： H04L1/02

CPC分类号： H04L25/03318 ,  H04L25/03203

摘要： An electronic MIMO-OFDM carrier frequency recovery method is disclosed. The method includes receiving a wirelessly propagated time-domain signal observation, estimating a data-channel vector from a latest observation vector by correcting for a phase rotation effect based on an initial estimate or an up-to-date estimate of a phase rotation term, removing an effect associated with the data-channel vector from the latest observation vector using the estimated data-channel vector to obtain an up-to-date estimate of the phase rotation term; and repeating those prior acts iteratively to allow for production of FFT input samples that are free or nearly free of carrier frequency and phase error.

摘要翻译： 公开了一种电子MIMO-OFDM载波频率恢复方法。 该方法包括：接收无线传播的时域信号观测;基于最初估计或相位旋转项的最新估计，通过校正相位旋转效应，从最新观测向量估计数据信道向量; 使用估计数据信道向量从最新观测向量中去除与数据信道向量相关联的效应，以获得相位旋转项的最新估计; 并重复地重复这些先前的动作，以允许产生空闲或几乎没有载波频率和相位误差的FFT输入样本。

公开(公告)号：US08239728B1

公开(公告)日：2012-08-07

申请号：US12459016

申请日：2009-06-25

申请人： Jaekyun Moon ,  Hernant Thapar

发明人： Jaekyun Moon ,  Hernant Thapar

IPC分类号： H03M13/00

CPC分类号： H03M13/251 ,  G06F11/1012 ,  H03M13/152

摘要： 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.

摘要翻译： 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：US20100162087A1

公开(公告)日：2010-06-24

申请号：US12623540

申请日：2009-11-23

申请人： Jihoon PARK ,  Jaekyun Moon ,  Jun Lee

发明人： Jihoon PARK ,  Jaekyun Moon ,  Jun Lee

IPC分类号： H03M13/07 ,  G06F11/10

CPC分类号： H03M13/033 ,  H03M13/09

摘要： 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 can completely specify each dominant error event.

摘要翻译： 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; 以及使用产生可以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：US07738600B2

公开(公告)日：2010-06-15

申请号：US11894102

申请日：2007-08-20

申请人： Younggyun Kim ,  Jaekyun Moon

发明人： Younggyun Kim ,  Jaekyun Moon

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

CPC分类号： H04L27/2662 ,  H04L25/03159 ,  H04L27/2657 ,  H04L27/2676 ,  H04L2025/03414

摘要： 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.

摘要翻译： 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

申请人： Younggyun Kim ,  Jaekyun Moon

发明人： Younggyun Kim ,  Jaekyun Moon

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

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

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： H04B1/02

CPC分类号： H04L1/0001 ,  H04B7/0811 ,  H04B7/0814 ,  H04L1/0015 ,  H04L1/206

摘要： 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

申请人： Jaekyun Moon

发明人： Jaekyun Moon

IPC分类号： H04J11/00 ,  H04Q7/24

CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L25/0228 ,  H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

摘要： 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.

摘要翻译： 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

申请人： Jihoon Park ,  Jaekyun Moon ,  Jun Lee

发明人： Jihoon Park ,  Jaekyun Moon ,  Jun Lee

IPC分类号： H03M7/00

CPC分类号： H03M5/145 ,  H03M13/09 ,  H03M13/31 ,  H03M13/6343

摘要： 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：US08706792B1

公开(公告)日：2014-04-22

申请号：US12589633

申请日：2009-10-26

申请人： Jaekyun Moon

发明人： Jaekyun Moon

IPC分类号： G06F11/00 ,  H03M13/00

CPC分类号： H03M13/6583 ,  H03M13/112 ,  H03M13/1171 ,  H03M13/658

摘要： f(x(sk−1, sk))=A(sk−1)+B(sk) is calculated for nm2 pairs of consecutive state variables {sk−1, sk} using A(sk)=minsk−1,x{A(sk−1)+Γ(xk=x)} and B(sk)=minsk+1,x{B(sk+1)+Γ(xk+1=x, sk+1)}, where Γ(xk=x) is a metric associated with a branch xk=x connecting consecutive state variables sk−1 and sk. The nm lowest values are selected from the nm2 calculated values of f(x(sk−1, sk))=A(sk−1)+B(sk) and log likelihood ratios (LLRs) are set to those lowest f(x(sk−1, sk)) values. The nm values of x that correspond to the nm lowest values are determined.

摘要翻译： 对于nm2对的连续状态变量{sk-1，sk}，使用A（sk）= minsk-1，x（s）来计算f（x（sk-1，sk））= A（sk-1） {A（sk-1）+＆Ggr;（xk = x）}和B（sk）= minsk + 1，x {B（sk + 1）+＆Ggr;（xk + 1 = x，sk + 1）}， 其中＆Ggr;（xk = x）是与连接连续状态变量sk-1和sk的分支xk = x相关联的度量。 nm最小值选自f（x（sk-1，sk））= A（sk-1）+ B（sk）的nm2计算值，对数似然比（LLR）设置为最低f （sk-1，sk））值。 确定对应于nm最低值的x的nm值。

公开(公告)号：US07610019B2

公开(公告)日：2009-10-27

申请号：US11449068

申请日：2006-06-08

申请人： Jaekyun Moon ,  Younggyun Kim ,  Barrett J. Brickner ,  Paul C. Edwards ,  Michael E. Butenhoff

发明人： Jaekyun Moon ,  Younggyun Kim ,  Barrett J. Brickner ,  Paul C. Edwards ,  Michael E. Butenhoff

IPC分类号： H04B17/00

CPC分类号： H04L1/0001 ,  H04B7/0811 ,  H04B7/0814 ,  H04L1/0015 ,  H04L1/206

摘要： 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.

摘要翻译： 基于接收机侧链路质量评估的用于动态分集信号接收的装置包括两个或更多个天线。 至少一个开关连接到两个或更多个天线。 动态分集控制器连接到至少一个开关。 动态分集控制器包括链路质量评估者，以评估链路质量并生成链路特征值。 响应于链路特征值的分集配置选择器选择性地激活至少一个交换机以实现动态分集配置。 链路质量评估器包括信号强度分析器，调制解调器检测器和/或MAC层分析器，以评估所接收的信号并产生链路表征值。