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1. 发明授权

US07526050B2 CCK demodulation via symbol decision feedback equalizer 有权
标题翻译：通过符号判决反馈均衡器进行CCK解调
公开(公告)号：US07526050B2
公开(公告)日：2009-04-28
申请号：US10460766
申请日：2003-06-12
申请人： Younggyun Kim , Jaekyun Moon
发明人： Younggyun Kim , Jaekyun Moon
IPC分类号： H03D1/00
CPC分类号： H04B1/71057 , H04B1/7093 , H04B2201/709709 , H04J11/0033 , H04L23/02 , H04L25/03057 , H04L25/03267 , H04L2025/03375 , H04L2025/03503 , H04L2027/0042
摘要： Demodulation techniques for a wireless communication system make use of a decision feedback equalization (DFE) technique to mitigate the effects of multipath channel characteristics on receiver performance. The techniques may be particularly useful in the demodulation of complementary code keying (CCK) symbols. A demodulator that performs such techniques may include a time-variant or time-invariant matched filter, a feedback intersymbol interference (ISI) canceller, a transform unit, a phase rotation estimator and corrector, a pattern-dependent bias canceller, and a maximum picker for symbol decisions. The transform unit may include a bank of correlators, or alternatively a fast Walsh transform unit.
摘要翻译：无线通信系统的解调技术利用判决反馈均衡（DFE）技术来减轻多径信道特性对接收机性能的影响。这些技术在解码补码编码（CCK）符号中可能特别有用。执行这种技术的解调器可以包括时变或时间不变的匹配滤波器，反馈符号间干扰（ISI）消除器，变换单元，相位旋转估计器和校正器，模式相关偏移消除器和最大选择器用于符号决定。变换单元可以包括一组相关器，或者可以包括快速沃尔什变换单元。

2. 发明授权

US07610019B2 Apparatus and method for dynamic diversity based upon receiver-side assessment of link quality 有权
标题翻译：基于接收机侧链路质量评估的动态分集装置和方法
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。

3. 发明申请

US20070286268A1 Digital phase locked loop 有权
标题翻译：数字锁相环
公开(公告)号：US20070286268A1
公开(公告)日：2007-12-13
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： H04B3/46
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。

4. 发明授权

US07173990B2 Joint equalization, soft-demapping and phase error correction in wireless system with receive diversity 有权
标题翻译：具有接收分集的无线系统中的联合均衡，软解映射和相位误差校正
公开(公告)号：US07173990B2
公开(公告)日：2007-02-06
申请号：US10141628
申请日：2002-05-06
申请人： Younggyun Kim , Farshid R Rad , Barrett J Brickner , Jaekyun Moon
发明人： Younggyun Kim , Farshid R Rad , Barrett J Brickner , Jaekyun Moon
IPC分类号： H04L1/02 , H04L5/12
CPC分类号： H04B7/0848 , H04B7/0837 , H04L1/06 , H04L25/0204 , H04L25/03159 , H04L25/067 , H04L27/38 , H04L2025/03414 , H04L2025/0342 , H04L2025/03426 , H04L2027/003 , H04L2027/004 , H04L2027/0057
摘要： A wireless communication technique enables equalization, soft demapping and phase error estimation functions to be performed jointly based on multiple observations of a transmitted symbol in wireless communication systems employing receive diversity. Multiple observations of a symbol are obtained from multiple antenna paths in a wireless receiver. Equalization, soft demapping and phase error estimation functions can be integrated within shared hardware, rather than distributed among separate hardware blocks, promoting reduced size, complexity and cost in a wireless receiver.
摘要翻译：无线通信技术使得能够基于采用接收分集的无线通信系统中的传输符号的多个观察来共同执行均衡，软解映射和相位误差估计功能。从无线接收机中的多个天线路径获得符号的多个观察结果。均衡，软解映射和相位误差估计功能可以集成在共享硬件中，而不是分布在不同的硬件块之间，从而在无线接收机中促进尺寸减小，复杂度和成本的降低。

5. 发明授权

US07738600B2 Digital phase locked loop 有权
标题翻译：数字锁相环
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。

6. 发明授权

US07190748B2 Digital front-end for wireless communication system 有权
标题翻译：数字前端无线通信系统
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。

7. 发明申请

US20060258304A1 Apparatus and method for dynamic diversity based upon receiver-side assessment of link quality 有权
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.

8. 发明授权

US07272175B2 Digital phase locked loop 有权
标题翻译：数字锁相环
公开(公告)号：US07272175B2
公开(公告)日：2007-09-18
申请号：US10137986
申请日：2002-05-01
申请人： Younggyun Kim , Jaekyun Moon
发明人： Younggyun Kim , Jaekyun Moon
IPC分类号： H04L27/14
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. The invention 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 invention 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。本发明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。本发明可以使用采样相位误差来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。

9. 发明授权

US07146134B2 Apparatus and method for dynamic diversity based upon receiver-side assessment of link quality 有权
公开(公告)号：US07146134B2
公开(公告)日：2006-12-05
申请号：US10117456
申请日：2002-04-04
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.

10. 发明授权

US08706792B1 Low-complexity q-ary LDPC decoder 有权
标题翻译：低复杂度q-ary LDPC解码器
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。

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