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。

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。

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。

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。

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.

公开(公告)号：US08675755B1

公开(公告)日：2014-03-18

申请号：US12830100

申请日：2010-07-02

申请人： Jungwon Lee ,  Jihwan P. Choi

发明人： Jungwon Lee ,  Jihwan P. Choi

IPC分类号： H04L5/12

CPC分类号： H04L1/0048 ,  H04L1/0041 ,  H04L25/03248 ,  H04L27/3488 ,  H04L2001/0093

摘要： A received signal includes a plurality of user signals, the plurality of user signals including at least a first user signal and a second user signal. The first user signal corresponds to first user data that has been modulated independently of second user data corresponding to the second user signal. At least one of the first user signal or the second user signal is encoded with a finite state machine encoder independently of the other of the first user signal and the second user signal. The received signal is demodulated, wherein demodulating the received signal includes calculating distances between (i) each transmit symbol in the received signal and (ii) expected symbol values, wherein each expected symbol value corresponds to user data for multiple users including the first user and the second user. User data in the received signal including the first user data and the second user data is decoded based on the calculated distances.

摘要翻译： 接收到的信号包括多个用户信号，所述多个用户信号至少包括第一用户信号和第二用户信号。 第一用户信号对应于已经独立于对应于第二用户信号的第二用户数据被调制的第一用户数据。 第一用户信号或第二用户信号中的至少一个与独立于第一用户信号和第二用户信号中的另一个的有限状态机编码器一起编码。 所接收的信号被解调，其中解调接收的信号包括计算（i）接收信号中的每个发送符号与（ii）预期符号值之间的距离，其中每个期望符号值对应于包括第一用户的多个用户的用户数据， 第二个用户。 基于计算出的距离对包括第一用户数据和第二用户数据的接收信号中的用户数据进行解码。

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。

公开(公告)号：US08588347B1

公开(公告)日：2013-11-19

申请号：US13160971

申请日：2011-06-15

申请人： Vladan Petrovic ,  Yakun Sun ,  Jungwon Lee

发明人： Vladan Petrovic ,  Yakun Sun ,  Jungwon Lee

IPC分类号： H04L27/06

CPC分类号： H04L1/0052 ,  H04B7/0891 ,  H04L1/0046 ,  H04L1/0061 ,  H04L1/0067 ,  H04L1/0075 ,  H04L1/08 ,  H04L5/0053 ,  H04L5/0091 ,  H04L25/03891 ,  H04L27/06

摘要： Systems and methods for performing efficient blind decoding. A first plurality of decision metrics corresponding to a first repetition of periodic decoding information is stored. The first plurality of decision metrics is grouped into sequential portions. A plurality of combined versions of the sequential portions is stored into combining buffers arranged in sequence. Each combined version is associated with a different sequence of timing information. A first of the plurality of combined versions stored in a first of the combining buffers is combined with a second version of a second plurality of decision metrics that corresponds to a second repetition of the periodic decoding information. The second version is associated with timing information adjacent in the timing information sequence to the timing information associated with the first combined version. The data is decoded based on information in the combining buffers.

摘要翻译： 执行高效盲解码的系统和方法。 存储对应于周期性解码信息的第一次重复的第一多个决策度量。 第一多个决策度量被分组成顺序部分。 顺序部分的多个组合版本被存储到依次布置的组合缓冲器中。 每个组合版本与不同的定时信息序列相关联。 存储在组合缓冲器中的第一组合中的多个组合版本中的第一版本与对应于周期性解码信息的第二次重复的第二多个决策度量的第二版本组合。 第二版本与定时信息序列相邻的定时信息与与第一组合版本相关联的定时信息相关联。 基于组合缓冲器中的信息对数据进行解码。

公开(公告)号：US08582692B1

公开(公告)日：2013-11-12

申请号：US13613212

申请日：2012-09-13

申请人： Qing Zhao ,  Souvik Dihidar ,  Leilei Song ,  Jungwon Lee

发明人： Qing Zhao ,  Souvik Dihidar ,  Leilei Song ,  Jungwon Lee

IPC分类号： H04L25/06

CPC分类号： H04L27/2647 ,  H04L25/06

摘要： In accordance with the teachings described herein, systems and methods are provided for calibrating DC offset in a receiver. A DC calibration circuit may be used that is configured to remove DC offset from a digital multi-carrier modulated (MCM) signal that includes a sequence of MCM symbols. The DC calibration circuit may include an accumulator and a compensator. The accumulator may be used to determine an estimated DC offset of a current MCM symbol in the sequence of MCM symbols. The compensator may be used to remove the estimated DC offset from a next MCM symbol in the sequence of MCM symbols. The accumulator may also be used to receive a plurality of digital samples that comprise the current MCM symbol and to determine the estimated DC offset by calculating an average of the plurality of digital samples.

摘要翻译： 根据本文所述的教导，提供了用于校准接收机中的DC偏移的系统和方法。 可以使用DC校准电路，其被配置为从包括MCM符号序列的数字多载波调制（MCM）信号中去除DC偏移。 DC校准电路可以包括蓄电池和补偿器。 可以使用累加器来确定MCM符号序列中的当前MCM符号的估计DC偏移。 补偿器可以用于从MCM符号序列中的下一个MCM符号中去除估计的DC偏移。 累加器还可以用于接收包括当前MCM符号的多个数字样本，并且通过计算多个数字样本的平均值来确定估计的DC偏移。

公开(公告)号：US08571148B1

公开(公告)日：2013-10-29

申请号：US13568747

申请日：2012-08-07

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04L27/06

CPC分类号： H04L27/2655 ,  H04L27/2657 ,  H04L27/2675

摘要： A system including a control module and a correlation module. The control module receives signals, including subcarriers having frequencies in a frequency band, via a plurality of antennas, and divides the frequency band into sub-bands each including a plurality of the subcarriers. The correlation module generates sets of correlation values by correlating symbols in the sub-bands with a plurality of preamble sequences. A set of correlation values is generated for one of the plurality of antennas and is generated based on the preamble sequences. The control module generates sums by adding selected correlation values from the sets. The selected correlation values in a sum are generated respectively for the plurality of antennas and are generated based on one of the preamble sequences. The control module detects a preamble sequence in the signals by determining whether a largest one of the sums is greater than or equal to a predetermined threshold.

摘要翻译： 一种包括控制模块和相关模块的系统。 控制模块经由多个天线接收包括具有频带频率的子载波的信号，并将该频带划分成各自包括多个子载波的子带。 相关模块通过将子带中的符号与多个前同步码序列相关联来生成相关值集合。 为多个天线中的一个天线生成一组相关值，并且基于前导序列生成相关值。 控制模块通过从集合中添加所选的相关值来产生和。 对于多个天线分别产生和中的选择的相关值，并且基于前导码序列之一生成。 控制模块通过确定和中的最大值是否大于或等于预定阈值来检测信号中的前导码序列。