会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Phase based preamble detection
    • 基于相位的前导码检测
    • US08804691B1
    • 2014-08-12
    • US12540758
    • 2009-08-13
    • Qing ZhaoChuxiang LiLeilei SongJungwon Lee
    • Qing ZhaoChuxiang LiLeilei SongJungwon Lee
    • H04L27/26H04W56/00H04W88/02
    • H04L27/2659H04L27/2613H04L27/2672H04L27/2675H04L27/2684H04W56/00H04W88/02
    • 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.
    • 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。
    • 2. 发明授权
    • Systems and methods for calibrating digital baseband DC offset in an OFDM receiver
    • 用于在OFDM接收机中校准数字基带DC偏移的系统和方法
    • US08582692B1
    • 2013-11-12
    • US13613212
    • 2012-09-13
    • Qing ZhaoSouvik DihidarLeilei SongJungwon Lee
    • Qing ZhaoSouvik DihidarLeilei SongJungwon Lee
    • H04L25/06
    • H04L27/2647H04L25/06
    • 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.
    • 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。
    • 3. 发明授权
    • Frame synchronization method and apparatus
    • 帧同步方法和装置
    • US08488698B1
    • 2013-07-16
    • US13194093
    • 2011-07-29
    • Qing ZhaoJungwon LeeLeilei SongSongping WuHui-Ling Lou
    • Qing ZhaoJungwon LeeLeilei SongSongping WuHui-Ling Lou
    • H04K1/10H04L27/28
    • H04L27/2656H04L27/2676
    • 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.
    • 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。
    • 4. 发明授权
    • Systems and methods for calibrating digital baseband DC offset in an OFDM receiver
    • 用于在OFDM接收机中校准数字基带DC偏移的系统和方法
    • US08279955B1
    • 2012-10-02
    • US12353391
    • 2009-01-14
    • Qing ZhaoSouvik DihidarLeilei SongJungwon Lee
    • Qing ZhaoSouvik DihidarLeilei SongJungwon Lee
    • H04K1/10
    • H04L27/2647H04L25/06
    • 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 receive 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.
    • 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,其被配置为接收包括MCM符号序列的数字多载波调制(MCM)信号。 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。
    • 5. 发明授权
    • Frame synchronization method and apparatus
    • 帧同步方法和装置
    • US07995666B1
    • 2011-08-09
    • US12899928
    • 2010-10-07
    • Qing ZhaoJungwon LeeLeilei SongSongping WuHui-Ling Lou
    • Qing ZhaoJungwon LeeLeilei SongSongping WuHui-Ling Lou
    • H04K1/10H04L27/28
    • H04L27/2656H04L27/2676
    • 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.
    • 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。
    • 6. 发明授权
    • Frame synchronization method and apparatus
    • 帧同步方法和装置
    • US07813436B1
    • 2010-10-12
    • US11851115
    • 2007-09-06
    • Qing ZhaoJungwon LeeLeilei SongSongping WuHui-Ling Lou
    • Qing ZhaoJungwon LeeLeilei SongSongping WuHui-Ling Lou
    • H04K1/10H04L27/28
    • H04L27/2656H04L27/2676
    • In a method for synchronizing a receiver to a synchronous signal, a plurality of potential symbols are detected in a signal, the signal having been processed based on automatic gain control (AGC) with a varying gain. Next frame potential symbols corresponding to potential symbols in the plurality of potential symbols are determined, the next frame potential symbols being in frames subsequent to the frames in which the corresponding potential symbols are located. A gain of the AGC is fixed for each corresponding symbol interval during which a next frame potential symbol is operated on by the AGC. In between next frame potential symbols, the AGC is allowed to vary. Next frame potential symbols are analyzed after a transform is calculated to determine if any correspond to a start of a frame.
    • 在将接收机同步到同步信号的方法中,在信号中检测多个电位符号,该信号已经基于具有变化增益的自动增益控制(AGC)来处理。 确定与多个电位符号中的电位符号相对应的下一帧电位符号,下一个电位符号位于相应电位符号位于的帧之后的帧中。 对于每个对应的符号间隔,AGC的增益是固定的,在该间隔期间,由AGC操作下一个帧电位符号。 在下一帧电势符号之间,允许AGC变化。 在计算变换之后分析下一​​帧电位符号,以确定是否有对应于帧的开始。
    • 7. 发明授权
    • Low-complexity scalable architecture for concatenation-assisted symbol-level combining
    • 用于级联辅助符号级组合的低复杂性可扩展架构
    • US08019023B2
    • 2011-09-13
    • US11839004
    • 2007-08-15
    • Leilei SongJungwon LeeWoong Jun Jang
    • Leilei SongJungwon LeeWoong Jun Jang
    • H04L27/06
    • H04L25/03331H04L1/0047H04L1/08H04L1/1812H04L25/0204H04L25/0246H04L2025/0342H04L2025/03426
    • 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.
    • 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。
    • 8. 发明申请
    • SYMBOL-LEVEL COMBINING FOR MIMO SYSTEMS WITH HARQ AND/OR REPETITION CODING
    • 用于具有HARQ和/或重复编码的MIMO系统的符号级组合
    • US20080025443A1
    • 2008-01-31
    • US11781200
    • 2007-07-20
    • Jungwon LeeWoong Jun JangLeilei Song
    • Jungwon LeeWoong Jun JangLeilei Song
    • H04B7/10
    • H04B7/0857
    • 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.
    • 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。