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21. 发明授权

US08411805B1 Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems 有权
标题翻译：正交频分复用系统的信道和前导序列的联合估计
公开(公告)号：US08411805B1
公开(公告)日：2013-04-02
申请号：US12169986
申请日：2008-07-09
申请人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou
发明人： Jungwon Lee , Jihwan P. Choi , Hui-Ling Lou
IPC分类号： H04L27/06
CPC分类号： H04W24/02 , H04L25/0224 , H04L25/0244 , H04L27/2613 , H04L27/2656 , H04L27/2675 , H04L27/2695
摘要： A mobile station (MS) includes an estimation module, a filter module, and a filter selection module. The estimation module receives an input signal having subcarriers and generates first channel estimates based on the input signal. The subcarriers are selectively used by a base station (BS) to transmit preamble sequences when communicating with the MS. The filter module includes first and second filters. One of the first and second filters selectively filters the first channel estimates and generates second channel estimates. The filter selection module selects the one of the first and second filters based on a number of the subcarriers used to transmit the preamble sequences.
摘要翻译：移动台（MS）包括估计模块，滤波器模块和滤波器选择模块。估计模块接收具有子载波的输入信号，并且基于输入信号产生第一信道估计。当与MS通信时，子载波由基站（BS）选择性地使用来发送前导码序列。过滤器模块包括第一和第二过滤器。第一和第二滤波器之一选择性地滤波第一信道估计并产生第二信道估计。滤波器选择模块基于用于发送前导码序列的子载波的数量来选择第一和第二滤波器中的一个。

22. 发明授权

US08238367B1 Slot allocation, user grouping, and frame partition method for H-FDD systems 有权
标题翻译： H-FDD系统的插槽分配，用户分组和帧分区方法
公开(公告)号：US08238367B1
公开(公告)日：2012-08-07
申请号：US12388302
申请日：2009-02-18
申请人： Jihwan P. Choi , Jungwon Lee
发明人： Jihwan P. Choi , Jungwon Lee
IPC分类号： H04J3/16
CPC分类号： H04L5/16 , H04L5/0007 , H04L5/0037 , H04L5/0064
摘要： Communication between a base station and remote stations is partitioned into frames, each including subframes having a number of slots that are allocated based on data rates for each remote station. For communication in a half-duplex mode, multiple subframes are used, each separated by a frame partition, such that a first user group of remote stations can receive down-link data in a first subframe while another user group of remote stations can transmit up-link data during that same subframe. For the next subframe, the converse happens. Slot allocation is achieved in such a half-duplex system based on weighted down-link and up-link data rates and without first or simultaneously determining user group allocation or frame partition, which are instead determined in response to the determined slot allocations for each remote station, e.g., using a linear programming technique.
摘要翻译：基站和远程站之间的通信被划分为帧，每个帧包括基于每个远程站的数据速率分配的具有多个时隙的子帧。对于以半双工模式进行通信，使用多个子帧，每个子帧由帧分区隔开，使得远程站的第一用户组可以在第一子帧中接收下行链路数据，而另一用户组的远程站可以向上发送链接数据。对于下一个子帧，相反的发生。在基于加权下行链路和上行链路数据速率的这种半双工系统中实现时隙分配，并且没有首先或同时确定用户组分配或帧分区，而是响应于每个远程的确定的时隙分配来确定站，例如使用线性编程技术。

23. 发明授权

US08045636B1 Maximum-likelihood frame synchronization algorithms for OFDM systems 有权
标题翻译： OFDM系统的最大似然帧同步算法
公开(公告)号：US08045636B1
公开(公告)日：2011-10-25
申请号：US12057221
申请日：2008-03-27
申请人： Jungwon Lee , Qing Zhao , Jihwan P. Choi
发明人： Jungwon Lee , Qing Zhao , Jihwan P. Choi
IPC分类号： H04L5/12 , H04L23/02
CPC分类号： H04L27/2656 , H04L5/0048 , H04L27/2613 , H04L27/2675
摘要： Autocorrelation algorithms are employed in systems and methods to detect preamble symbols for frame synchronization in WiMAX (Worldwide Interoperability for Microwave Access) or OFDMA (Orthogonal Frequency Division Multiple Access) systems. An ML (“Maximum Likelihood”) estimator estimates segment index and frame timing information for an ideal signal scenario. When using the ML estimator, a received time domain signal is sampled. Groups of samples are formed, and the group is further divided into a plurality of portions. Then, an autocorrelation between time domain samples of each portion results in a maximum value which indicates the start of a preamble of the time domain signal. Frame synchronization can then be performed. In other transmission scenarios, the algorithm is modified to use modified estimators of the preamble symbol location. When using the modified estimators, less than all of the portions of samples are compared to one another to find a maximum value.
摘要翻译：在WiMAX（全球微波接入互操作性）或OFDMA（正交频分多址）系统中用于检测用于帧同步的前同码符的系统和方法中采用自相关算法。 ML（“最大似然”）估计器估计理想信号场景的片段索引和帧定时信息。当使用ML估计器时，对接收到的时域信号进行采样。形成一组样品，并将该组进一步分成多个部分。然后，每个部分的时域样本之间的自相关产生指示时域信号的前导码开始的最大值。然后可以执行帧同步。在其他传输场景中，修改算法以使用前导符号位置的修改估计器。当使用修改后的估计量时，将少于样本的全部部分相互比较以找到最大值。

24. 发明授权

US07961641B1 Initial ranging power control algorithm for WiMAX mobile stations 有权
标题翻译： WiMAX移动台初始测距功率控制算法
公开(公告)号：US07961641B1
公开(公告)日：2011-06-14
申请号：US12109320
申请日：2008-04-24
申请人： Jihwan P. Choi , Jiwon S. Han , Jungwon Lee
发明人： Jihwan P. Choi , Jiwon S. Han , Jungwon Lee
IPC分类号： H04J1/16
CPC分类号： H04W52/50 , H04W52/241 , H04W52/242
摘要： A device and method for connecting to a WiMAX network can determine an initial signal strength as a function of an uplink propagation path loss between a mobile device and a base station, a noise and interference level value for the base station, a normalized carrier-to-noise value for ranging, and an offset value. If a connection is not established at the initial signal strength, a signal can be retransmitted at a signal strength equal to the initial signal strength plus a step value, where the step value can be determined by designating a fixed number of steps to be used before reaching maximum transmission power.
摘要翻译：用于连接到WiMAX网络的设备和方法可以确定作为移动设备和基站之间的上行链路传播路径损耗的函数的初始信号强度，基站的噪声和干扰电平值，归一化载波到 -noise测量值和一个偏移值。如果在初始信号强度下没有建立连接，则可以以等于初始信号强度加上步进值的信号强度来重传信号，其中可以通过指定在之前使用的固定数量的步骤来确定步长值达到最大传输功率。

25. 发明授权

US09564980B2 Mobile telecommunication system with noise ratio estimation mechanism and method of operation thereof 有权
标题翻译：具有噪声比估计机构的移动通信系统及其操作方法
公开(公告)号：US09564980B2
公开(公告)日：2017-02-07
申请号：US13590567
申请日：2012-08-21
申请人： Insoo Hwang , Heejin Roh , Jungwon Lee , Inyup Kang
发明人： Insoo Hwang , Heejin Roh , Jungwon Lee , Inyup Kang
IPC分类号： H04W4/00 , H04B17/336 , H04B17/26 , H04B17/345
CPC分类号： H04B17/336 , H04B17/26 , H04B17/345
摘要： A method of operation of a mobile telecommunication system includes: measuring a received reference signal; removing a guard portion from the received reference signal; determining a noise variance estimate from both a noise region of the received reference signal and a noise sample in a signal region of the received reference signal, or calculating a dispersion power of a noise region of the received reference signal and determining the noise variance estimate based on at least a dispersion power; and calculating a signal to noise ratio from the noise variance estimate for adjusting a receiver device.
摘要翻译：移动电信系统的操作方法包括：测量接收的参考信号; 从所接收的参考信号中去除保护部分; 从接收到的参考信号的噪声区域和所接收的参考信号的信号区域中的噪声样本两者中确定噪声方差估计，或者计算所接收的参考信号的噪声区域的色散功率，并基于至少分散功率; 以及根据用于调整接收机设备的噪声方差估计来计算信噪比。

26. 发明授权

US08897406B2 Communication system with iterative detector and decoder and method of operation thereof 有权
标题翻译：具有迭代检测器和解码器的通信系统及其操作方法
公开(公告)号：US08897406B2
公开(公告)日：2014-11-25
申请号：US13460630
申请日：2012-04-30
申请人： Hyukjoon Kwon , Jungwon Lee , Inyup Kang
发明人： Hyukjoon Kwon , Jungwon Lee , Inyup Kang
IPC分类号： H04N1/10
CPC分类号： H04J11/004 , H04L25/067
摘要： A method of operation of a communication system includes: receiving an input signal having an input primary codeword and an input parallel codeword; calculating a primary codeword signal by removing a parallel soft information average of the input parallel codeword from the input signal; filtering a residual parallel interference of the input parallel codeword from the primary codeword signal with a primary whitening filter to generate a primary codeword estimation of the input primary codeword; and calculating a primary detected soft information for the primary codeword estimation for communicating with a device.
摘要翻译：一种通信系统的操作方法包括：接收具有输入主码字和输入并行码字的输入信号; 通过从输入信号去除输入并行码字的并行软信息平均来计算主码字信号; 将来自主码字信号的输入并行码字的残留并行干扰与主白化滤波器进行滤波，以产生输入主码字的主码字估计; 以及计算用于与所述设备进行通信的所述主码字估计的主检测软信息。

27. 发明授权

US08817643B1 Method and apparatus for monitoring a radio link in a communication system 有权
标题翻译：用于监视通信系统中的无线电链路的方法和装置
公开(公告)号：US08817643B1
公开(公告)日：2014-08-26
申请号：US13155985
申请日：2011-06-08
申请人： Yakun Sun , Jungwon Lee
发明人： Yakun Sun , Jungwon Lee
IPC分类号： H04W24/04
CPC分类号： H04W24/04 , H04W24/08
摘要： In a method for monitoring a radio link in a wireless communication system, a plurality of short term radio link quality values based on one or more measured channel matrices is determined. A long term radio link quality value is determined from the plurality of the short term radio link quality values. Additionally, radio link failure or recovery is indicated, when appropriate, based on the long term radio link quality value.
摘要翻译：在无线通信系统中监视无线电链路的方法中，确定基于一个或多个测量信道矩阵的多个短期无线电链路质量值。从多个短期无线电链路质量值确定长期无线电链路质量值。另外，根据长期的无线电链路质量值，在适当的情况下指示无线电链路故障或恢复。

28. 发明授权

US08718166B2 Maximal ratio combining of equalized symbols for MIMO systems with HARQ and/or repetition coding 有权
标题翻译：用于MIMO系统的均衡符号与HARQ和/或重复编码的最大比组合
公开(公告)号：US08718166B2
公开(公告)日：2014-05-06
申请号：US11834599
申请日：2007-08-06
申请人： Jungwon Lee , Woong Jun Jang , Hui-Ling Lou
发明人： Jungwon Lee , Woong Jun Jang , Hui-Ling Lou
IPC分类号： H04B7/02
CPC分类号： H04L27/01 , H04B7/0413 , H04B7/0697 , H04B7/0845 , H04B7/0857 , H04L1/08 , H04L1/1816 , H04L1/1845 , H04L2025/03426
摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors based on the same transmitted vector. The receiver linearizes each received signal vector using one or more zero-forcing, MMSE, or other suitable linear equalizers. The components of the equalized signal vectors may be combined using maximum-ratio combining to form the components of a combined equalized signal vector. The components of the combined equalized signal vector may then be decoded individually using a linear decoder.
摘要翻译：提供了用于对多输入多输出（MIMO）系统中的信号向量进行解码的系统和方法，其中接收机已经基于相同的传输向量接收了一个或多个信号向量。接收机使用一个或多个零强制，MMSE或其他合适的线性均衡器来线性化每个接收信号向量。可以使用最大比合并来组合均衡的信号向量的分量以形成组合的均衡信号向量的分量。然后可以使用线性解码器单独地解码组合的均衡信号向量的分量。

29. 发明授权

US08699601B1 Distance-level combining for MIMO systems with HARQ and/or repetition coding 有权
公开(公告)号：US08699601B1
公开(公告)日：2014-04-15
申请号：US11833827
申请日：2007-08-03
申请人： Jungwon Lee , Woong Jun Jang
发明人： Jungwon Lee , Woong Jun Jang
IPC分类号： H04B7/02
CPC分类号： H04B1/10 , H04B7/0413 , H04L1/0052 , H04L1/0054 , H04L1/08 , H04L1/1816 , H04L1/1845 , H04L25/067
摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from the same transmitted vector. For each received signal vector, the receiver evaluates a decoding metric using each possible value of the transmitted signal vector to produce a set of distances. The receiver then combines distances from across the received signal vectors to produce a combined distance associated with each possible value of the transmitted signal vector. Using the combined distances, the receiver may choose among the possible values of the transmit signal vector to determine the actual transmit signal vector.

30. 发明授权

US08665986B2 Communication system with modulation classifier and method of operation thereof 有权
标题翻译：具有调制分类器的通信系统及其操作方法
公开(公告)号：US08665986B2
公开(公告)日：2014-03-04
申请号：US13435309
申请日：2012-03-30
申请人： Dongwoon Bai , Jungwon Lee , Sungsoo Kim , Junghyun Bae , Jooyeol Yang , Inyup Kang
发明人： Dongwoon Bai , Jungwon Lee , Sungsoo Kim , Junghyun Bae , Jooyeol Yang , Inyup Kang
IPC分类号： H04B15/00
CPC分类号： H04L27/0012
摘要： A method of operation of a communication system includes: calculating a shift distance of a received signal having a distortion; calculating an approximate likelihood of the received signal matching a transmitted signal from the shift distance; determining a bias factor from the distortion; and selecting a determined modulation maximizing a combination of the approximate likelihood and the bias factor for communicating with a device.
摘要翻译：一种通信系统的操作方法包括：计算具有失真的接收信号的移位距离; 计算所述接收信号与所述移动距离匹配的发送信号的近似似然度; 从失真中确定偏差因子; 以及选择最大化用于与设备通信的近似似然性和偏差因子的组合的确定的调制。

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