公开(公告)号：US20080025443A1

公开(公告)日：2008-01-31

申请号：US11781200

申请日：2007-07-20

申请人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

发明人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

IPC分类号： H04B7/10

CPC分类号： H04B7/0857

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. The symbols of the received signal vectors are combined, forming a combined received signal vector that may be treated as a single received signal vector. The combined signal vector is then decoded using a maximum-likelihood decoder. In some embodiments, the combined received signal vector may be processed prior to decoding. Systems and methods are also provided for computing soft information from a combined signal vector based on a decoding metric. Computationally intensive calculations can be extracted from the critical path and implemented in preprocessors and/or postprocessors.

摘要翻译： 提供了用于对多输入多输出（MIMO）系统中的信号矢量进行解码的系统和方法，其中接收机已经从相同的传输矢量接收了一个或多个信号矢量。 组合接收信号矢量的符号，形成可被视为单个接收信号矢量的组合接收信号矢量。 然后使用最大似然解码器对组合的信号矢量进行解码。 在一些实施例中，组合的接收信号矢量可以在解码之前被处理。 还提供了用于基于解码度量从组合信号向量计算软信息的系统和方法。 可以从关键路径提取计算密集型计算，并在预处理器和/或后处理器中实现。

公开(公告)号：US09106295B1

公开(公告)日：2015-08-11

申请号：US13550298

申请日：2012-07-16

申请人： Hongyuan Zhang ,  Leilei Song ,  Rohit U. Nabar

发明人： Hongyuan Zhang ,  Leilei Song ,  Rohit U. Nabar

IPC分类号： H04B7/00 ,  H04B7/06 ,  H04L25/03

CPC分类号： H04B7/0626 ,  H04B7/0417 ,  H04B7/0478 ,  H04L25/03343 ,  H04L25/03949 ,  H04L2025/03426

摘要： An equalizer is applied to a signal to be transmitted via at least one multiple input, multiple output (MIMO) channel or received via at least one MIMO channel using a matrix equalizer computational device. Channel state information (CSI) is received, and the CSI is provided as an input to the matrix equalizer computational device when the matrix equalizer computational device is not needed for matrix equalization. One or more transmit beamsteering codewords are selected from a transmit beamsteering codebook based on output generated by the matrix equalizer computational device in response to the CSI input to the matrix equalizer computational device.

摘要翻译： 均衡器被应用于要经由至少一个多输入多输出（MIMO）信道发射的信号或者通过使用矩阵均衡器计算设备经由至少一个MIMO信道接收的信号。 当矩阵均衡器计算设备不需要用于矩阵均衡时，接收到信道状态信息（CSI），并且将CSI作为矩阵均衡器计算设备的输入提供。 响应于对矩阵均衡器计算装置的CSI输入，基于由矩阵均衡器计算装置产生的输出，从发射波束导向码本中选择一个或多个发射波束引导码字。

公开(公告)号：US08488698B1

公开(公告)日：2013-07-16

申请号：US13194093

申请日：2011-07-29

申请人： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

发明人： Qing Zhao ,  Jungwon Lee ,  Leilei Song ,  Songping Wu ,  Hui-Ling Lou

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L27/2656 ,  H04L27/2676

摘要： In a method for synchronizing a receiver to a synchronous signal, in a signal having been processed based on an automatic gain control (AGC) with a varying gain, a symbol is detected. An estimated beginning of a subsequent frame is determined based on the detected symbol. A gain of the AGC is fixed for a period during which the estimated start of the subsequent frame is processed by the AGC. A transform of the signal is analyzed to determine if the estimated start of the subsequent frame corresponds to an actual start of the subsequent frame. If the estimated start of the subsequent frame does not corresponds to the actual start of the subsequent frame, the gain of the AGC is allowed to resume varying and, a further symbol in the signal is detected, the signal having been processed based on the varying gain of the AGC.

摘要翻译： 在用于将接收机同步到同步信号的方法中，在基于具有变化增益的自动增益控制（AGC）处理的信号中，检测到符号。 基于检测到的符号确定后续帧的估计开始。 AGC的增益在AGC期间处理后续帧的估计开始的期间是固定的。 分析信号的变换以确定后续帧的估计开始是否对应于后续帧的实际开始。 如果后续帧的估计开始不对应于后续帧的实际开始，则允许AGC的增益恢复变化，并且检测到信号中的另外的符号，该信号已经根据变化 增益AGC。

公开(公告)号：US08279966B2

公开(公告)日：2012-10-02

申请号：US13236410

申请日：2011-09-19

申请人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

发明人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

IPC分类号： H04B7/02

CPC分类号： H04B7/0842 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/189 ,  H04L25/0204

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. The symbols of the received signal vectors are combined, forming a combined received signal vector that may be treated as a single received signal vector. The combined signal vector is then decoded using a maximum-likelihood decoder. In some embodiments, the combined received signal vector may be processed prior to decoding. Systems and methods are also provided for computing soft information from a combined signal vector based on a decoding metric. Computationally intensive calculations can be extracted from the critical path and implemented in preprocessors and/or postprocessors.

公开(公告)号：US08098774B1

公开(公告)日：2012-01-17

申请号：US12140022

申请日：2008-06-16

申请人： Konstantinos Sarrigeorgidis ,  Yanni Chen ,  Leilei Song ,  Kedar Shirali

发明人： Konstantinos Sarrigeorgidis ,  Yanni Chen ,  Leilei Song ,  Kedar Shirali

IPC分类号： H04L27/06 ,  H03M13/03

CPC分类号： H04L25/067 ,  H03M13/612 ,  H04L1/0045 ,  H04L25/03286 ,  H04L27/2647

摘要： Methods and apparatus are provided for performing LLR value computations in a pipeline. Portions of a metric used to compute LLR values are computed in one pipeline part. The portions correspond to all permutations of some received signal streams. The portions are combined with one permutation x2 of the received signal stream that was not included in the previous pipeline computation in a subsequent pipeline part to produce M values associated with a particular bit position. At each subsequent clock cycle, a different permutation of x2 is combined with the previously computed portions producing different M values. State values corresponding to different values of bit positions of the received stream are computed by finding the minimum among the M values, in each clock cycle, that affect a particular bit position. The state values are combined to compute the LLR values for the bit position in a final pipeline part.

摘要翻译： 提供了在流水线中执行LLR值计算的方法和装置。 用于计算LLR值的度量的部分在一个管道部分中计算。 这些部分对应于一些接收的信号流的所有排列。 这些部分与接收信号流的一个置换x2组合在一起，该置换x2未被包括在随后的流水线部分中的先前流水线计算中，以产生与特定位位置相关联的M个值。 在每个随后的时钟周期，x2的不同置换与先前计算的产生不同M值的部分组合。 通过在每个时钟周期内找到影响特定位位置的M个值中的最小值来计算对应于接收流的比特位置的不同值的状态值。 组合状态值以计算最终流水线部分中位位置的LLR值。

公开(公告)号：US08331475B1

公开(公告)日：2012-12-11

申请号：US12406587

申请日：2009-03-18

申请人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

发明人： Arul Durai Murugan Palanivelu ,  Leilei Song ,  Rohit U. Nabar ,  Jungwon Lee ,  Sayandev Mukherjee ,  Hui-Ling Lou

IPC分类号： H04B7/02 ,  H04L27/28

CPC分类号： H04B7/0413 ,  H04L25/03242 ,  H04L25/03961 ,  H04L25/067 ,  H04L2025/03414 ,  H04L2025/0342

摘要： Systems and methods for detecting data in a multiple input/multiple output signal. The method includes receiving a first signal associated with a first data value and a second signal associated with a second data value. A distance value between the received second signal and each possible second data value is calculated. Coordinates for a hypothetical first signal in light of a first possible second data value are calculated, and the first coordinate value is quantized to a nearest constellation point. A distance value between the received second signal and each possible second data value is calculated using the calculated constellation points. A determination is made of a log-likelihood ratio based on the determined distance values.

摘要翻译： 用于检测多输入/多输出信号中的数据的系统和方法。 该方法包括接收与第一数据值相关联的第一信号和与第二数据值相关联的第二信号。 计算接收到的第二信号与每个可能的第二数据值之间的距离值。 计算出根据第一可能的第二数据值的假设第一信号的坐标，并且将第一坐标值量化到最接近的星座点。 使用所计算的星座点来计算所接收的第二信号与每个可能的第二数据值之间的距离值。 基于确定的距离值来确定对数似然比。

公开(公告)号：US20120121005A1

公开(公告)日：2012-05-17

申请号：US13354527

申请日：2012-01-20

申请人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

发明人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

IPC分类号： H04L27/01

CPC分类号： H04L27/06 ,  H04B7/0885 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1845 ,  H04L27/01 ,  H04L2025/03426 ,  H04L2025/03713

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. The receiver combines the received vectors by vector concatenation The concatenated vector may then be decoded using, for example, maximum-likelihood decoding. In some embodiments, the combined signal vector is equalized before decoding.

摘要翻译： 提供了用于对多输入多输出（MIMO）系统中的信号矢量进行解码的系统和方法，其中接收机已经从相同的传输矢量接收了一个或多个信号矢量。 接收机通过矢量级联组合接收的矢量然后可以使用例如最大似然解码来对连接的矢量进行解码。 在一些实施例中，组合信号矢量在解码之前被均衡。

公开(公告)号：US08121209B2

公开(公告)日：2012-02-21

申请号：US11724882

申请日：2007-03-16

申请人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

发明人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

IPC分类号： H04L1/02

CPC分类号： H04L27/06 ,  H04B7/0885 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1845 ,  H04L27/01 ,  H04L2025/03426 ,  H04L2025/03713

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. The receiver combines the received vectors by vector concatenation The concatenated vector may then be decoded using, for example, maximum-likelihood decoding. In some embodiments, the combined signal vector is equalized before decoding.

公开(公告)号：US08027402B2

公开(公告)日：2011-09-27

申请号：US11781208

申请日：2007-07-20

申请人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

发明人： Jungwon Lee ,  Woong Jun Jang ,  Leilei Song

IPC分类号： H04B7/02

CPC分类号： H04B7/0842 ,  H04L1/1819 ,  H04L1/1845 ,  H04L1/189 ,  H04L25/0204

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. The symbols of the received signal vectors are combined, forming a combined received signal vector that may be treated as a single received signal vector. The combined signal vector is then decoded using a maximum-likelihood decoder. In some embodiments, the combined received signal vector may be processed prior to decoding. Systems and methods are also provided for computing soft information from a combined signal vector based on a decoding metric. Computationally intensive calculations can be extracted from the critical path and implemented in preprocessors and/or postprocessors.

摘要翻译： 提供了用于对多输入多输出（MIMO）系统中的信号矢量进行解码的系统和方法，其中接收机已经从相同的传输矢量接收了一个或多个信号矢量。 组合接收信号矢量的符号，形成可被视为单个接收信号矢量的组合接收信号矢量。 然后使用最大似然解码器对组合的信号矢量进行解码。 在一些实施例中，组合的接收信号矢量可以在解码之前被处理。 还提供了系统和方法，用于基于解码度量从组合信号向量计算软信息。 可以从关键路径提取计算密集型计算，并在预处理器和/或后处理器中实现。

公开(公告)号：US07610495B2

公开(公告)日：2009-10-27

申请号：US10874834

申请日：2004-06-23

申请人： Kameran Azadet ,  Leilei Song

发明人： Kameran Azadet ,  Leilei Song

IPC分类号： G06F1/00 ,  G06F1/26 ,  G06F1/32

CPC分类号： H04W52/0277 ,  Y02D70/142

摘要： A method and apparatus are disclosed for power management of an electronic device. The present invention reduces power consumption of an electronic device that communicates over a network by selecting a transmission mode with reduced power consumption as the battery level gets lower. A disclosed power management process monitors the battery level of an electronic device and selects a transmission mode (e.g., a transmission rate) with a lower power consumption when the battery power level reaches one or more predefined threshold levels.

摘要翻译： 公开了一种用于电子设备的电源管理的方法和装置。 本发明通过在电池电平降低时通过选择具有降低的功耗的传输模式来降低通过网络进行通信的电子设备的功耗。 公开的电源管理过程监视电子设备的电池电量，并且当电池功率电平达到一个或多个预定阈值电平时，选择具有较低功耗的传输模式（例如，传输速率）。