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282 条记录 (耗时 0.044 秒)

    OFDM signal demodulation method and device thereof
    141.
    发明申请
    OFDM signal demodulation method and device thereof 有权
    OFDM信号解调方法及其装置

    公开(公告)号：US20120114031A1

    公开(公告)日：2012-05-10

    申请号：US13259038

    申请日：2010-04-23

    申请人： Qiang Li ,  Ning Qiu ,  Nanshan Cao

    发明人： Qiang Li ,  Ning Qiu ,  Nanshan Cao

    IPC分类号： H04L27/06 ,  H04L27/01

    CPC分类号： H04L25/03159 ,  H04L25/0216 ,  H04L25/022 ,  H04L27/2607 ,  H04L27/2657 ,  H04L27/2665 ,  H04L27/2672 ,  H04L27/2676 ,  H04L27/2695 ,  H04L2025/03414

    摘要： The present invention discloses an OFDM signal demodulation method and device thereof. The method comprises: adding a pre-obtained timing offset estimation value of an OFDM signal demodulation device to the initial position of an OFDM symbol of a received signal to obtain a window deviation value of the OFDM symbol; adding a channel time delay extension to the window deviation value to obtain a combined prefix initial position; calculating the combined OFDM signal value starting from the prefix initial position; processing the Fast Fourier Transform (FFT) for the combined OFDM signal value to obtain a frequency domain data subcarrier signal; calculating the frequency domain original channel estimation value processing the channel estimation based on the original channel estimation value phase modification of the OFDM symbol according to the channel estimation compensation indication value; and processing equalization and detection for the frequency domain data subcarrier signal according to the channel estimation result. The present invention uses the cycle prefix of the received signals to promote the demodulation performance of the OFDM signal demodulation device.

    摘要翻译： 本发明公开了一种OFDM信号解调方法及其装置。 该方法包括：将预先获得的OFDM信号解调装置的定时偏移估计值加到接收信号的OFDM符号的初始位置，以获得OFDM符号的窗口偏移值; 向窗口偏差值增加一个通道时间延迟以获得组合的前缀初始位置; 从前缀初始位置开始计算组合的OFDM信号值; 处理用于组合的OFDM信号值的快速傅立叶变换（FFT）以获得频域数据子载波信号; 根据信道估计补偿指示值，根据OFDM符号的原始信道估计值相位修正来计算频域原始信道估计值处理信道估计值; 以及根据信道估计结果处理频域数据子载波信号的均衡和检测。 本发明使用接收信号的周期前缀来促进OFDM信号解调装置的解调性能。

    Differential varactor circuit for a voltage controlled oscillator
    144.
    发明授权
    Differential varactor circuit for a voltage controlled oscillator 有权
    用于压控振荡器的差分变容二极管电路

    公开(公告)号：US08098109B2

    公开(公告)日：2012-01-17

    申请号：US12460989

    申请日：2009-07-27

    申请人： Qiang Li ,  Shr-Lung Chen ,  Richard Chen

    发明人： Qiang Li ,  Shr-Lung Chen ,  Richard Chen

    IPC分类号： H03B1/00

    CPC分类号： H03B5/1228 ,  H03B5/1215 ,  H03B5/1253 ,  H03B5/1265

    摘要： According to one exemplary embodiment, a differential varactor circuit for a voltage controlled oscillator having two differential outputs includes a first varactor having first and second terminals and a second varactor having first and second terminals. In the differential varactor circuit, each of the first and second terminals of the first varactor and each of the first and second terminals of the second varactor are coupled to one of the two differential outputs of the voltage controlled oscillator, thereby allowing a size of each of the first and second varactors to be reduced so as to increase varactor quality factor. Each of the first and second terminals of the first varactor can be coupled to one of the two differential outputs by a capacitor, and each of the first and second terminals of the second varactor can be coupled to one of the two differential outputs by a capacitor.

    摘要翻译： 根据一个示例性实施例，用于具有两个差分输出的压控振荡器的差分变容二极管电路包括具有第一和第二端子的第一变容二极管和具有第一和第二端子的第二变容二极管。 在差分变容二极管电路中，第一变容二极管的第一和第二端子和第二变容二极管的第一和第二端子中的每一个耦合到压控振荡器的两个差分输出中的一个，从而允许每个 的第一和第二变容二极管被还原，以增加变容二极管品质因数。 第一变容二极管的第一和第二端子中的每一个可以通过电容器耦合到两个差分输出中的一个，并且第二变容二极管的第一和第二端子中的每一个可以通过电容器耦合到两个差分输出中的一个 。

    Double transformer balun for maximum power amplifier power
    145.
    发明授权
    Double transformer balun for maximum power amplifier power 有权
    双变压器平衡 - 不平衡变压器，用于最大功率放大器功率

    公开(公告)号：US08086263B2

    公开(公告)日：2011-12-27

    申请号：US13031833

    申请日：2011-02-22

    申请人： Jesus Alfonso Castaneda ,  Qiang Li ,  Ahmadreza (Reza) Rofougaran

    发明人： Jesus Alfonso Castaneda ,  Qiang Li ,  Ahmadreza (Reza) Rofougaran

    IPC分类号： H04M1/00 ,  H01F27/28

    CPC分类号： H03H7/422 ,  H03F1/02 ,  H03F3/24 ,  H03F3/60 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/534 ,  H03F2200/541 ,  Y10T29/49135

    摘要： 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.

    摘要翻译： 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。

    Balun signal transformer and method of forming
    147.
    发明授权
    Balun signal transformer and method of forming 有权
    平衡变压器信号变压器及其成型方法

    公开(公告)号：US07961063B2

    公开(公告)日：2011-06-14

    申请号：US12183755

    申请日：2008-07-31

    申请人： Lianjun Liu ,  Jonathan K. Abrokwah ,  Olin L. Hartin ,  Qiang Li

    发明人： Lianjun Liu ,  Jonathan K. Abrokwah ,  Olin L. Hartin ,  Qiang Li

    IPC分类号： H03H7/42 ,  H01P5/12

    CPC分类号： H03H7/42 ,  H01F19/08 ,  H01F2017/0046 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775

    摘要： A balanced-unbalanced (balun) signal transformer includes an unbalanced port, a balanced port coupled to the unbalanced port, the balanced port comprising a first terminal and a second terminal, a first capacitor coupled to the first terminal, a first inductor coupled to ground and the first capacitor, a second capacitor coupled to the second terminal, and a second inductor coupled to ground and the second capacitor. The transformer may also include a third capacitor coupled to a terminal of the unbalanced port; and a third inductor coupled to the third capacitor and the third terminal.

    摘要翻译： 平衡不平衡（balun）信号变压器包括不平衡端口，耦合到不平衡端口的平衡端口，平衡端口包括第一端子和第二端子，耦合到第一端子的第一电容器，耦合到地的第一电感器 并且第一电容器，耦合到第二端子的第二电容器和耦合到地的第二电感器和第二电容器。 变压器还可以包括耦合到不平衡端口的端子的第三电容器; 以及耦合到所述第三电容器和所述第三端子的第三电感器。

    Synthesis of High-Efficiency Thermoelectric Materials
    148.
    发明申请
    Synthesis of High-Efficiency Thermoelectric Materials 审中-公开
    高效热电材料的合成

    公开(公告)号：US20110120517A1

    公开(公告)日：2011-05-26

    申请号：US12945677

    申请日：2010-11-12

    申请人： Qiang Li

    发明人： Qiang Li

    IPC分类号： H01L35/28 ,  H01L35/12 ,  B22F1/00 ,  B22F3/10 ,  B22F3/12 ,  H01L35/34

    CPC分类号： H01L35/18 ,  B22D11/0611 ,  B22F3/14 ,  B22F9/08 ,  B22F2999/00 ,  C22C1/0491 ,  C22C12/00 ,  H01L35/34 ,  B22F3/10 ,  B22F2202/11

    摘要： A process for the fabrication of high efficiency thermoelectric materials using non-equilibrium synthesis routes is described. In one embodiment a molten alloy comprising a predetermined ratio of elements which will constitute the thermoelectric material is quenched at a cooling rate in excess of, for example, 105 or 106 K/s using a process such as melt spinning. The rapidly solidified particles are then placed into a mold having the desired size and shape. The particles in the mold are simultaneously compressed and sintered at elevated temperatures for a short duration using, for example, hot pressing or spark plasma sintering. The overall process provides improved microstructural control and greatly expands the accessible phase space, permitting the formation of dense, single-phase structures with nanosized grain boundaries and minimal or no impurity segregation. The process is especially advantageous for the formation of n- and p-type filled skutterudites which may be incorporated in thermoelectric devices.

    摘要翻译： 描述了使用非平衡合成路线制造高效热电材料的方法。 在一个实施方案中，将使用诸如熔融纺丝的方法以包括构成热电材料的预定比例的元素的熔融合金以超过例如105或106K / s的冷却速率淬火。 然后将快速凝固的颗粒放入具有所需尺寸和形状的模具中。 使用例如热压或放电等离子体烧结，将模具中的颗粒同时压缩并在高温下烧结短时间。 整个过程提供了改进的微结构控制，并且极大地扩展了可接近的相位空间，允许形成具有纳米晶界的致密的单相结构和最小的或没有杂质偏析。 该方法对于形成可并入热电装置的n型和p型填充方钴矿是特别有利的。

    Method and System for Mitigating the Effects of Pulling in Multiple Phase Locked Loops in Multi-Standard Systems
    149.
    发明申请
    Method and System for Mitigating the Effects of Pulling in Multiple Phase Locked Loops in Multi-Standard Systems 有权
    减轻多标准系统中多相锁定环的牵引效应的方法与系统

    公开(公告)号：US20110103526A1

    公开(公告)日：2011-05-05

    申请号：US13004675

    申请日：2011-01-11

    申请人： Qiang Li ,  Razieh Roufoogaran ,  Arya Behzad ,  Dandan Li ,  Hung-Ming Chien

    发明人： Qiang Li ,  Razieh Roufoogaran ,  Arya Behzad ,  Dandan Li ,  Hung-Ming Chien

    IPC分类号： H04L27/06

    CPC分类号： H04B1/406 ,  H03L7/18 ,  Y02D70/122 ,  Y02D70/124

    摘要： Certain aspects of a method and system for mitigating effects of pulling in multiple phase locked loops in multi-standard systems may include selecting an input frequency range of operation at a voltage controlled oscillator based on a particular wireless band of operation in a system that handles a first wireless communication protocol and a second wireless communication protocol. An image rejection mixer may be enabled to generate an output signal for the particular wireless band of operation based on mixing a plurality of received signals within a selected frequency range. An in-phase (I) component and a quadrature (Q) component of the generated output signal may be generated by utilizing a RC-CR quadrature network.

    摘要翻译： 用于减轻在多标准系统中拉动多个锁相环的影响的方法和系统的某些方面可包括基于处理一个或多个系统的系统中的特定无线工作频带来选择在压控振荡器处的输入频率范围 第一无线通信协议和第二无线通信协议。 可以使镜像抑制混频器能够基于在所选频率范围内混合多个接收信号来产生用于特定无线操作频带的输出信号。 可以通过利用RC-CR正交网络来产生所产生的输出信号的同相（I）分量和正交（Q）分量。

    Folding roof cover for vehicles
    150.
    发明申请
    Folding roof cover for vehicles 审中-公开
    车顶折叠屋顶

    公开(公告)号：US20110095561A1

    公开(公告)日：2011-04-28

    申请号：US12589388

    申请日：2009-10-23

    申请人： Xingkang Li ,  Qiang Li ,  Xingjian Li

    发明人： Xingkang Li ,  Qiang Li ,  Xingjian Li

    IPC分类号： B62D25/06

    CPC分类号： B60J11/04

    摘要： A center foam strip has a series of transverse fold lines separating the strip into panels which fold onto each other in an accordion pattern for storage. A soft fabric waterproof cover material is attached to the center foam strip to hang down the sides of the vehicle to be closed in the vehicle doors shading the side windows. The cover material and center foam strip are sewn together to conform to the shape of the top of a particular vehicle with the foam strip covering the roof, windshield, and rear window. The center foam strip and surrounding soft fabric are held in place by the trunk lid, doors, and windshield wipers.

    摘要翻译： 中心泡沫条具有一系列横向折叠线，将条带分离成彼此以手风琴图案相互折叠的面板，以便存放。 柔软的织物防水覆盖材料连接到中心泡沫条上，以将车辆侧面悬挂在车门上遮蔽侧窗。 覆盖材料和中心泡沫条被缝合在一起以符合特定车辆的顶部的形状，泡沫条覆盖屋顶，挡风玻璃和后窗。 中心泡沫条和周围的柔软织物通过行李箱盖，门和挡风玻璃刮水器固定在适当位置。