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    • 31. 发明申请
    • METHOD AND DEVICE FOR FILTERING CHANNEL ESTIMATION RESULT IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING
    • 正交频分多路复用过滤通道估计结果的方法与装置
    • US20110228884A1
    • 2011-09-22
    • US13132782
    • 2009-09-03
    • Ning QiuQiang LiLi ChenNanshan CaoTao ZhangYueyi You
    • Ning QiuQiang LiLi ChenNanshan CaoTao ZhangYueyi You
    • H04B1/10
    • H04L25/022H04L5/0048H04L25/0234H04L27/2647
    • The invention provides a method and device for filtering orthogonal frequency division multiplexing (OFDM) channel estimate result, to solve the problems in the prior art that for channel estimate result filtering the realization is complex or the performance is poor. By embodiments the following method is described: transforming time domain synchronous symbols received by the terminal equipment to frequency domain synchronous symbols; computing frequency domain impulse response sequences based on the frequency domain synchronous symbols; adjusting least mean square (LMS) adaptive filter coefficients based on the frequency domain impulse response sequences; obtaining coefficients of the data symbol channel estimate result frequency domain filter based on the coefficients obtained from said adjusting; filtering the OFDM channel estimate result by using the data symbol channel estimate result frequency domain filter. The corresponding device is disclosed by the embodiments. There is less computation, simpler realization and better filtering performance provided with the OFDM channel estimate result frequency domain filter obtained from the technical solution of the present invention.
    • 本发明提供了一种用于过滤正交频分复用(OFDM)信道估计结果的方法和装置,以解决现有技术中对于信道估计结果过滤的复杂或性能差的问题。 通过实施例描述了以下方法:将由终端设备接收的时域同步符号转换为频域同步符号; 基于频域同步符号计算频域脉冲响应序列; 基于频域脉冲响应序列调整最小均方(LMS)自适应滤波器系数; 基于从所述调整获得的系数,获得数据符号信道估计结果频域滤波器的系数; 通过使用数据符号信道估计结果频域滤波器对OFDM信道估计结果进行滤波。 相应的装置由实施例公开。 与从本发明的技术方案获得的OFDM信道估计结果频域滤波器相比,计算量少,实现更简单,滤波性能更好。
    • 32. 发明申请
    • DOUBLE TRANSFORMER BALUN FOR MAXIMUM POWER AMPLIFIER POWER
    • 双变压器BALUN用于最大功率放大器功率
    • US20110133835A1
    • 2011-06-09
    • US13031833
    • 2011-02-22
    • Jesus Alfonso CastanedaQiang LiAhmadreza (Reza) Rofougaran
    • Jesus Alfonso CastanedaQiang LiAhmadreza (Reza) Rofougaran
    • H03F1/00H01F27/30
    • H03H7/422H03F1/02H03F3/24H03F3/60H03F2200/06H03F2200/09H03F2200/294H03F2200/372H03F2200/534H03F2200/541Y10T29/49135
    • Double transformer balun for maximum PA (Power Amplifier) power. A novel approach is presented herein by which conversion from a differential signal to single-ended signal may be achieved using a double transformer balun design. The secondary coils of the double transformer balun also operate as a choke for the PA supply voltage. The secondary coils can operate as an RF (Radio Frequency) trap or choke to keep any AC (Alternating Current) signal components and to pass any DC (Direct Current) components. By using a double transformer balun design, relatively thinner tracks may be employed thereby ensuring a high degree of electromagnetic coupling efficiency and high performance. Also, these relatively thinner tracks consume a relatively small amount of space on the die. The double transformer balun design also includes a matching Z (impedance) block that is operable to match the Z of an antenna or line that the PA is driving.
    • 双变压器平衡 - 不平衡变压器,用于最大PA(功率放大器)功率。 本文提出了一种新颖的方法,其中可以使用双变压器平衡 - 不平衡变换器来实现从差分信号到单端信号的转换。 双变压器平衡不平衡变压器的次级线圈也作为PA电源电压的扼流圈。 次级线圈可以作为射频(射频)陷波器或扼流圈工作,以保持任何交流(交流)信号分量,并通过任何直流(直流)组件。 通过使用双变压器平衡 - 不平衡变压器设计,可以采用相对较薄的轨道,从而确保高度的电磁耦合效率和高性能。 此外,这些相对较薄的轨道在模具上消耗相对较小的空间。 双变压器平衡 - 不平衡变压器设计还包括匹配的Z(阻抗)块,其可操作以匹配PA驱动的天线或线路的Z。
    • 33. 发明授权
    • Frequent pattern array
    • 频繁图案阵列
    • US07953685B2
    • 2011-05-31
    • US11965379
    • 2007-12-27
    • Li LiuQiang Li
    • Li LiuQiang Li
    • G06F17/00G06N5/00
    • G06F17/30961
    • Machine readable media, methods, and computing devices are disclosed that mine a dataset using a frequent pattern array. One method of includes building a frequent pattern tree comprising a plurality of nodes to represent frequent transactions of a dataset that comprises one or more items. The method also includes transforming the frequent pattern tree to a frequent pattern array that comprises an item array and a plurality of node arrays, the item array comprising frequent transactions of the dataset and each node array to associate an item of the dataset with one or more frequent transactions of the item array. The method further includes identifying frequent transactions of the dataset based upon the frequent pattern array.
    • 公开了使用频繁模式阵列挖掘数据集的机器可读介质,方法和计算设备。 一种方法包括构建包括多个节点的频繁模式树,以表示包括一个或多个项目的数据集的频繁事务。 该方法还包括将频繁模式树变换为包括项目数组和多个节点数组的频繁模式数组,所述项目数组包括数据集和每个节点数组的频繁事务以将数据集的项目与一个或多个 项目数组的频繁事务。 该方法还包括基于频繁模式阵列识别数据集的频繁事务。
    • 40. 发明授权
    • Programmable amplitude compensation circuit
    • 可编程幅度补偿电路
    • US07586342B2
    • 2009-09-08
    • US12072437
    • 2008-02-26
    • Qiang LiRazieh Roufoogaran
    • Qiang LiRazieh Roufoogaran
    • H03B1/00
    • H03G3/001
    • According to one exemplary embodiment, an amplitude compensation circuit includes a first composite programmable buffer for receiving a first input signal with a first input amplitude. The amplitude compensation circuit further includes a second composite programmable buffer for receiving a second input signal with a second input amplitude. The amplitude compensation circuit also includes a feedback circuit coupled to respective outputs of the first and second composite programmable buffers. According to this embodiment, the feedback circuit compares a first output amplitude of the first composite programmable buffer with a reference voltage and a second output amplitude of the second composite programmable buffer with the reference voltage and provides first and second control signals for adjusting the respective gains of the first and second composite programmable buffers so as to reduce respective differences between the first and second output amplitudes and the reference voltage.
    • 根据一个示例性实施例,幅度补偿电路包括用于接收具有第一输入幅度的第一输入信号的第一复合可编程缓冲器。 幅度补偿电路还包括用于接收具有第二输入幅度的第二输入信号的第二复合可编程缓冲器。 振幅补偿电路还包括耦合到第一和第二复合可编程缓冲器的相应输出的反馈电路。 根据该实施例,反馈电路将第一复合可编程缓冲器的第一输出幅度与具有参考电压的第二复合可编程缓冲器的参考电压和第二输出幅度进行比较,并提供用于调整相应增益的第一和第二控制信号 的第一和第二复合可编程缓冲器,以便减小第一和第二输出幅度与参考电压之间的差异。