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1. 发明授权

US08582692B1 Systems and methods for calibrating digital baseband DC offset in an OFDM receiver 有权
标题翻译：用于在OFDM接收机中校准数字基带DC偏移的系统和方法
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。

2. 发明授权

US08411786B1 System and method of selecting a data detection technique for a multiple-input multiple-output (MIMO) system 有权
标题翻译：选择多输入多输出（MIMO）系统的数据检测技术的系统和方法
公开(公告)号：US08411786B1
公开(公告)日：2013-04-02
申请号：US13346476
申请日：2012-01-09
申请人： Leilei Song , Nabar U. Rohit , Hui-Ling Lou , Kedar Shirali
发明人： Leilei Song , Nabar U. Rohit , Hui-Ling Lou , Kedar Shirali
IPC分类号： H04B7/02
CPC分类号： H04L27/0008 , H04L1/0003 , H04L1/0009 , H04L1/0036 , H04L27/22 , H04L27/38
摘要： One or more communications parameters associated with a multiple input, multiple output (MIMO) signal transmitted by a transmitter are identified. The one or more communications parameters include one or more of (i) a number of receive antennas via which the MIMO signal is received, (ii) a number of spatial streams in the MIMO signal, and (iii) a signal to noise ratio (SNR) corresponding to the MIMO signal. A particular data detection technique of a plurality of data detection techniques employed by a receiver is selected in accordance with at least one of the one or more communications parameters.
摘要翻译：识别与由发射机发射的多输入多输出（MIMO）信号相关联的一个或多个通信参数。所述一个或多个通信参数包括以下中的一个或多个：（i）接收MIMO信号的多个接收天线，（ii）MIMO信号中的多个空间流，以及（iii）信噪比（ SNR）。根据一个或多个通信参数中的至少一个来选择由接收机采用的多个数据检测技术的特定数据检测技术。

3. 发明授权

US08019023B2 Low-complexity scalable architecture for concatenation-assisted symbol-level combining 有权
标题翻译：用于级联辅助符号级组合的低复杂性可扩展架构
公开(公告)号：US08019023B2
公开(公告)日：2011-09-13
申请号：US11839004
申请日：2007-08-15
申请人： Leilei Song , Jungwon Lee , Woong Jun Jang
发明人： Leilei Song , Jungwon Lee , Woong Jun Jang
IPC分类号： H04L27/06
CPC分类号： H04L25/03331 , H04L1/0047 , H04L1/08 , H04L1/1812 , H04L25/0204 , H04L25/0246 , H04L2025/0342 , H04L2025/03426
摘要： Systems and methods are provided for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where a receiver has received one or more signal vectors from the same transmitted vector. The receiver processes these received signal vectors one by one, and uses information from signal vectors that have already been processed to process the next signal vector. To process a current signal vector, the receiver concatenates the current signal vector with a previously processed signal vector. This concatenated signal vector is decoded using, for example, a maximum-likelihood (ML). To decode the concatenated signal vector, the ML decoder can use a concatenated channel matrix that includes a channel response matrix associated with the current signal vector and a processed version of previous channel response matrices.
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，其中接收机已经从相同的传输向量接收到一个或多个信号向量。接收机一个接一个地处理这些接收的信号矢量，并且使用已经被处理的信号矢量的信息来处理下一个信号矢量。为了处理当前信号向量，接收器将当前信号向量与先前处理的信号向量进行连接。使用例如最大似然（ML）对该级联信号矢量进行解码。为了解码级联信号向量，ML解码器可以使用包括与当前信号向量相关联的信道响应矩阵和先前信道响应矩阵的处理版本的级联信道矩阵。

4. 发明申请

US20080025443A1 SYMBOL-LEVEL COMBINING FOR MIMO SYSTEMS WITH HARQ AND/OR REPETITION CODING 有权
标题翻译：用于具有HARQ和/或重复编码的MIMO系统的符号级组合
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。

5. 发明授权

US07089485B2 Simple link protocol providing low overhead coding for LAN serial and WDM solutions 有权
标题翻译：简单的链路协议，为LAN串行和WDM解决方案提供低开销编码
公开(公告)号：US07089485B2
公开(公告)日：2006-08-08
申请号：US09776175
申请日：2001-02-02
申请人： Kamran Azadet , Leilei Song , Thomas E. Truman , Meng-Lin Yu
发明人： Kamran Azadet , Leilei Song , Thomas E. Truman , Meng-Lin Yu
IPC分类号： G06F11/00
CPC分类号： H04L1/0061 , H04J14/02 , H04L29/06 , H04L69/324
摘要： A data structure, method and protocol wherein synchronization data indicative of a data frame delineation point is inserted within an inter-packet gap (IPG) proximate a data frame during transmission. Optionally, a cyclical redundancy check (CRC) length indicative data, pointer data, and other data is inserted within the IPG to further insure appropriate delineation of data frames within a data stream.
摘要翻译：数据结构，方法和协议，其中指示数据帧描绘点的同步数据被插入在传输期间靠近数据帧的分组间间隔（IPG）内。可选地，在IPG内插入指示数据，指针数据和其他数据的循环冗余校验（CRC）长度，以进一步确保数据流内的数据帧的适当描述。

6. 发明授权

US08331475B1 Low complexity technique for log-likelihood ratio computation 有权
标题翻译：对数似然比计算的低复杂度技术
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。

7. 发明申请

US20120121005A1 CONCATENATION-ASSISTED SYMBOL-LEVEL COMBINING FOR MIMO SYSTEMS WITH HARQ AND/OR REPETITION CODING 有权
标题翻译：用于具有HARQ和/或重复编码的MIMO系统的协议辅助符号级组合
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。

8. 发明授权

US08121209B2 Concatenation-assisted symbol-level combining for MIMO systems with HARQ and/or repetition coding 有权
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.

9. 发明授权

US08027402B2 Symbol-level combining for multiple input multiple output (MIMO) systems with hybrid automatic repeat request (HARQ) and/or repetition coding 有权
标题翻译：具有混合自动重传请求（HARQ）和/或重复编码的多输入多输出（MIMO）系统的符号级组合
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。

10. 发明授权

US07610495B2 Method and apparatus for power management using transmission mode with reduced power 有权
标题翻译：使用功率降低的传输模式进行电源管理的方法和装置
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）。

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