公开(公告)号：US08804691B1

公开(公告)日：2014-08-12

申请号：US12540758

申请日：2009-08-13

申请人： Qing Zhao ,  Chuxiang Li ,  Leilei Song ,  Jungwon Lee

发明人： Qing Zhao ,  Chuxiang Li ,  Leilei Song ,  Jungwon Lee

IPC分类号： H04L27/26 ,  H04W56/00 ,  H04W88/02

CPC分类号： H04L27/2659 ,  H04L27/2613 ,  H04L27/2672 ,  H04L27/2675 ,  H04L27/2684 ,  H04W56/00 ,  H04W88/02

摘要： Devices, methods, and other embodiments associated with phase based preamble detection are described. In one embodiment, an apparatus includes a wireless transceiver, an evaluation logic, and a configuration logic. The wireless transceiver receives a wireless signal from a wireless device. The wireless signal includes a preamble sequence. The evaluation logic evaluates the preamble sequence by comparing phases of the preamble sequence to phases of predefined preamble sequences to identify a matching preamble sequence. The comparison is done without using amplitude information. The configuration logic configures the wireless transceiver to synchronize wireless communications with the wireless device based, at least in part, on the matching preamble sequence.

摘要翻译： 描述了与基于相位的前导码检测相关联的设备，方法和其他实施例。 在一个实施例中，一种装置包括无线收发器，评估逻辑和配置逻辑。 无线收发器从无线设备接收无线信号。 无线信号包括前序序列。 评估逻辑通过将前导序列的相位与预定义的前导码序列的相位进行比较来评估前导序列，以识别匹配的前导码序列。 比较不使用振幅信息。 配置逻辑配置无线收发器以至少部分地基于匹配的前导码序列来与无线设备同步无线通信。

公开(公告)号：US08781020B1

公开(公告)日：2014-07-15

申请号：US13555919

申请日：2012-07-23

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC分类号： H04B7/02

CPC分类号： H04B7/0665

摘要： A channel estimation matrix H describing a forward channel in which a signal travels from a first communication device to a second communication device is determined at the second communication device. QR decomposition on the channel estimation matrix H is performed, at the second communication device, to derive a unitary matrix Q and an upper triangular matrix R, such that H=QR. Only a portion of the upper triangular matrix R is transmitted, from the second communication device to the first communication device, so that the first communication device can use the portion of the upper triangular matrix R to precode signals to be transmitted by the first communication device.

摘要翻译： 在第二通信设备处确定描述信号从第一通信设备行进到第二通信设备的前向信道的信道估计矩阵H。 在第二通信设备处执行在信道估计矩阵H上的QR分解以导出酉矩阵Q和上三角矩阵R，使得H = QR。 只有上层三角矩阵R的一部分从第二通信装置传送到第一通信装置，使得第一通信装置可以使用上三角矩阵R的部分来对第一通信装置发送的信号进行预编码 。

公开(公告)号：US08750418B2

公开(公告)日：2014-06-10

申请号：US12463017

申请日：2009-05-08

申请人： Jungwon Lee ,  Yakun Sun ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Yakun Sun ,  Hui-Ling Lou

IPC分类号： H04L27/00

CPC分类号： H04B7/024 ,  H04B7/0413 ,  H04L1/0042 ,  H04L1/0068 ,  H04L1/0643 ,  H04L1/1819

摘要： Techniques are provided for transmitting and receiving a mother code in an incremental redundancy hybrid automatic repeat-request protocol. A set of information bits corresponding to a message may be encoded and interleaved to produce the mother code. Each bit position of the mother code may be mapped to an output symbol, and each output symbol may be mapped to an antenna for transmission. One or more transmissions of symbols contained in the output symbols may be performed, where each transmission may include puncturing the mother code by selecting one or more symbols from the of output symbols, and transmitting each symbol in the one or more symbols on an antenna corresponding to that symbol. The mother code may be decoded, in part, by determining combinable bits contained within a set of received symbols, and computing one or more log-likelihood ratio values corresponding to each symbol in the set of received symbols.

摘要翻译： 提供了用于以增量冗余混合自动重复请求协议发送和接收母码的技术。 对应于消息的一组信息位可以被编码和交织以产生母码。 母码的每个比特位置可以被映射到输出符号，并且每个输出符号可以被映射到天线以进行传输。 可以执行输出符号中包含的符号的一个或多个传输，其中每个传输可以包括通过从输出符号中选择一个或多个符号来对母码进行穿刺，并且在天线上的一个或多个符号中发送每个符号 到那个符号。 可以部分地通过确定包含在一组接收到的符号内的可组合比特，以及计算与所接收的符号集合中的每个符号相对应的一个或多个对数似然比值来对母码进行解码。

公开(公告)号：US08718675B1

公开(公告)日：2014-05-06

申请号：US13165462

申请日：2011-06-21

申请人： Jihwan P. Choi ,  Jungwon Lee

发明人： Jihwan P. Choi ,  Jungwon Lee

IPC分类号： H04W24/00

CPC分类号： H04W4/02 ,  H04W64/00 ,  H04W68/005 ,  H04W68/02

摘要： Systems and techniques relating to wireless communications are described. A described technique includes generating a paging message for a wireless communication device, the paging message can include a positioning request; transmitting the paging message to the wireless communication device; and receiving, during a connection establishment process, a connection message from the wireless communication device. The connection message can include a positioning response that is responsive to the positioning request.

摘要翻译： 描述与无线通信相关的系统和技术。 所描述的技术包括为无线通信设备生成寻呼消息，寻呼消息可以包括定位请求; 将所述寻呼消息发送到所述无线通信设备; 以及在连接建立过程期间从所述无线通信设备接收连接消息。 连接消息可以包括响应于定位请求的定位响应。

公开(公告)号：US08687750B1

公开(公告)日：2014-04-01

申请号：US13159931

申请日：2011-06-14

申请人： Jungwon Lee ,  Jiwoong Choi ,  Yakun Sun

发明人： Jungwon Lee ,  Jiwoong Choi ,  Yakun Sun

IPC分类号： H03D1/04

CPC分类号： H04B1/10 ,  H04L25/03891 ,  H04L2025/03426

摘要： Systems, methods, and other embodiments associated with signal detection with an adjustable number of interfering signals. According to one embodiment an apparatus includes an interferer counter, a detection method selector, and a signal detector. The interferer counter is configured to identify a number of active interfering signals in a received signal. The detection method selector is configured to select a signal detection method based, at least in part, on the number of active interfering signals identified by the interferer counter. The signal detector is configured to process the received signal according to the signal detection method selected by the detection method selector to detect an intended signal in the received signal.

摘要翻译： 与可调节数量的干扰信号的信号检测相关的系统，方法和其它实施例。 根据一个实施例，一种装置包括干扰计数器，检测方法选择器和信号检测器。 干扰计数器被配置为识别接收信号中的多个有源干扰信号。 检测方法选择器被配置为至少部分地基于由干扰计数器识别的有源干扰信号的数量来选择信号检测方法。 信号检测器被配置为根据由检测方法选择器选择的信号检测方法处理接收信号，以检测接收信号中的预期信号。

公开(公告)号：US08665694B2

公开(公告)日：2014-03-04

申请号：US12189437

申请日：2008-08-11

申请人： Jungwon Lee ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Hui-Ling Lou

IPC分类号： H04J1/12

CPC分类号： H04L5/0048 ,  H04L5/0062 ,  H04L5/0073

摘要： Systems and methods are provided for transmitting information between an intended source and a receiver to minimize co-channel interference from at least one interfering source. Pilot subcarriers and data subcarriers may be broadcast from an intended source arid at least one interfering source. The pilot subcarriers may be shared across base stations or distributed among base stations in frequency, in time, or both. In addition, the frequency reuse factor of the pilot subcarriers may be different than the frequency reuse factor of the data subcarriers. A receiver receives a composite signal that corresponds with an intended signal from an intended source and an interfering signal from at least one interfering source. The portion of the received signal that corresponds to the intended signal may be recovered by the receiver based on the broadcast of the pilot subcarriers.

摘要翻译： 提供了系统和方法，用于在预期的源和接收机之间传输信息以最小化来自至少一个干扰源的同信道干扰。 导频子载波和数据子载波可以从预期的源和至少一个干扰源广播。 导频子载波可以在基站之间共享或者在频率，时间上或两者中分布在基站之间。 此外，导频子载波的频率重用因子可能不同于数据子载波的频率重用因子。 接收机接收来自预期源的预期信号和来自至少一个干扰源的干扰信号的复合信号。 对应于预期信号的接收信号的部分可以由接收机基于导频子载波的广播来恢复。

公开(公告)号：US08654910B1

公开(公告)日：2014-02-18

申请号：US13570750

申请日：2012-08-09

申请人： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

发明人： Jungwon Lee ,  Rohit U. Nabar ,  Hui-Ling Lou

IPC分类号： H03D1/04

CPC分类号： H04L25/0206 ,  H04L25/0228 ,  H04L25/03331

摘要： Apparatus and methods are provided for computing soft information at a receiver having a plurality of receive antennas. The receiver may be a mobile station or a base station, and can receive a signal vector that includes an intended signal from a first source as well as interfering signals from one or more other, interfering sources. The receiver can determine modulation information, such as the modulation scheme, used by each of the interfering sources. The mobile station can also estimate channel information, such as channel gain information, associated with each interfering source. Using the modulation and channel information, the receiver can compute soft information, such as a log-likelihood ratio. In some embodiments, the receiver can adaptively determine which interference sources and which receive antennas to use when computing the soft information.

摘要翻译： 提供了用于在具有多个接收天线的接收机处计算软信息的装置和方法。 接收机可以是移动站或基站，并且可以接收包括来自第一源的预期信号以及来自一个或多个其它干扰源的干扰信号的信号向量。 接收机可以确定由每个干扰源使用的调制方式，例如调制方案。 移动站还可以估计与每个干扰源相关联的信道信息，例如信道增益信息。 使用调制和信道信息，接收机可以计算软信息，例如对数似然比。 在一些实施例中，当计算软信息时，接收机可以自适应地确定哪些干扰源和哪些接收天线使用。

公开(公告)号：US08644262B1

公开(公告)日：2014-02-04

申请号：US13112009

申请日：2011-05-20

申请人： Yakun Sun ,  Adina Matache ,  Jungwon Lee

发明人： Yakun Sun ,  Adina Matache ,  Jungwon Lee

IPC分类号： H04W4/00

CPC分类号： H04B7/0456 ,  H04B7/0413 ,  H04B7/0632 ,  H04B7/066 ,  H04B7/0671 ,  H04B7/0673 ,  H04B7/0678 ,  H04B7/068 ,  H04B7/0691 ,  H04B17/336 ,  H04L1/0026 ,  H04L1/0029 ,  H04L1/0036 ,  H04L1/06 ,  H04L5/0023

摘要： Systems and methods are provided for determining a channel quality indicator (CQI) in a transmission system associated with a diversity transmission scheme. A plurality of independent diversity branches are identified in the diversity transmission scheme. Each one of the independent diversity branches may correspond to a different portion of the effective channel and may include any suitable combination of frequency, time, and/or spatial components of the effective channel or of any wired or wireless paths or combinations of the same. An effective Signal-to-Noise Ratio (SNR) value is computed for each one of the identified independent diversity branches. The computed effective SNR values are combined for the identified independent diversity branches to generate a CQI value.

摘要翻译： 提供了用于确定与分集传输方案相关联的传输系统中的信道质量指示符（CQI）的系统和方法。 在分集传输方案中识别出多个独立分集分支。 独立分集分支中的每一个可以对应于有效信道的不同部分，并且可以包括有效信道或任何有线或无线路径或其组合的频率，时间和/或空间分量的任何合适的组合。 为所识别的独立分集分支中的每一个计算有效的信噪比（SNR）值。 为所识别的独立分集分支组合计算出的有效SNR值以产生CQI值。

公开(公告)号：US08630379B1

公开(公告)日：2014-01-14

申请号：US13164111

申请日：2011-06-20

申请人： Yakun Sun ,  Jungwon Lee

发明人： Yakun Sun ,  Jungwon Lee

IPC分类号： H03D1/04

CPC分类号： H04B7/0456 ,  H04B1/10 ,  H04B7/0413 ,  H04J11/004 ,  H04L1/0048 ,  H04L25/03305

摘要： Systems and methods are provided for determining a successive interference cancellation (SIC) decoding ordering in a multiple input multiple output transmission (MIMO) system. Multiple decoding orderings for received codewords are identified. A performance objective, such as total throughput or total probability of decoding, is computed for each one of the orderings based on the position of the codewords in the ordering. A globally optimal ordering is found that maximizes the performance objective over the multiple decoding orderings.

摘要翻译： 提供了用于确定多输入多输出传输（MIMO）系统中的连续干扰消除（SIC）解码排序的系统和方法。 识别接收码字的多个解码顺序。 基于排序中的码字的位置，针对每个排序计算性能目标，例如总吞吐量或总解码概率。 发现全局最优排序，使多个解码顺序的性能目标最大化。

公开(公告)号：US08630371B1

公开(公告)日：2014-01-14

申请号：US13475191

申请日：2012-05-18

申请人： Jungwon Lee ,  Raj M. Misra ,  Adina Matache ,  Konstantinos Sarrigeorgidis

发明人： Jungwon Lee ,  Raj M. Misra ,  Adina Matache ,  Konstantinos Sarrigeorgidis

IPC分类号： H03K9/00

CPC分类号： H04L25/024 ,  H04L25/022 ,  H04L25/0228 ,  H04L27/2601 ,  H04L27/2657 ,  H04L2027/003 ,  H04L2027/0067 ,  H04L2027/0093

摘要： Systems and methods are provided for channel estimation using linear phase estimation. These systems and methods enable improved channel estimation by estimating a linear channel phase between received pilot subcarrier signals. The estimated linear phase can then be removed from the received pilot subcarrier signals. After the estimated linear phase is removed from the received pilot subcarrier signals, a channel response can be estimated. A final estimated channel response can be generated by multiplying the results of the linear channel estimation by the estimated linear phase.

摘要翻译： 提供了使用线性相位估计的信道估计的系统和方法。 这些系统和方法通过估计接收的导频副载波信号之间的线性信道相位来实现改进的信道估计。 然后可以从接收到的导频子载波信号中去除估计的线性相位。 在从接收到的导频子载波信号中去除估计的线性相位之后，可以估计信道响应。 可以通过将线性信道估计的结果乘以估计的线性相位来生成最终估计的信道响应。