公开(公告)号：US20090325509A1

公开(公告)日：2009-12-31

申请号：US12163248

申请日：2008-06-27

申请人： Sven Mattisson ,  Paul Wilkinson Dent

发明人： Sven Mattisson ,  Paul Wilkinson Dent

IPC分类号： H04B1/40

CPC分类号： H04B1/525

摘要： Circuits and methods are disclosed for reducing interference from transmitter leakage in a radio transceiver. An exemplary method for reducing interference from transmitter leakage in a radio transceiver comprises downconverting, filtering, and sampling a radio frequency signal comprising a desired signal and a transmitter leakage signal to obtain a sampled signal of interest. The method further comprises generating a sampled distortion signal estimate that estimates one or more distortion products of the transmitter leakage signal, such as a squared amplitude obtained from a square-law device or corresponding digital function. Finally, the method comprises combining the sampled distortion signal estimate with the sampled signal of interest to obtain interference-reduced signal samples. In some embodiments, this may comprise correlating the sampled distortion signal estimate with the sampled signal of interest to determine a scaling factor, scaling the sampled distortion signal estimate with the scaling factor, and subtracting the scaled distortion signal estimate from the sampled signal of interest to obtain the interference-reduced signal samples.

摘要翻译： 公开了用于减少无线电收发器中发射机泄漏的干扰的电路和方法。 用于减少无线电收发机中的发射机泄漏的干扰的示例性方法包括对包括期望信号和发射机泄漏信号的射频信号进行下变频，滤波和采样，以获得感兴趣的采样信号。 该方法还包括生成估计发射机泄漏信号的一个或多个失真产物的采样失真信号估计，例如从平方律装置获得的平方振幅或相应的数字功能。 最后，该方法包括将采样的失真信号估计与所关注的采样信号组合以获得干扰减小的信号采样。 在一些实施例中，这可以包括将采样的失真信号估计与所关注的采样信号相关联以确定缩放因子，用缩放因子缩放采样的失真信号估计，以及从所感测的采样信号中减去经缩放的失真信号估计 获得干扰减少信号样本。

公开(公告)号：US20090160576A1

公开(公告)日：2009-06-25

申请号：US11963884

申请日：2007-12-24

申请人： Paul Wilkinson Dent

发明人： Paul Wilkinson Dent

IPC分类号： H03H7/21 ,  G06F17/14

CPC分类号： H04B1/0458 ,  H01Q3/40 ,  H01Q25/007

摘要： The coupling circuit described herein comprises passive analog components for coupling a transceiver to an antenna, such as an antenna array. The coupling circuit transforms an input signal into an appropriate format for each element of the antenna array. The coupling circuit comprises a coupling network having a plurality of inputs and a plurality of outputs. The inputs provide quadriphase versions of at least one input signal. In one embodiment, the coupling circuit performs a Discrete Fourier Transform (DFT) on the input signal. In another embodiment, the coupling circuit performs a Fast Fourier Transform (FFT) on the input signal. In still another embodiment, the FFT performed by the coupling circuit implements a Butler matrix.

摘要翻译： 本文描述的耦合电路包括用于将收发器耦合到诸如天线阵列的天线的无源模拟组件。 耦合电路将输入信号转换为天线阵列的每个元件的适当格式。 耦合电路包括具有多个输入和多个输出的耦合网络。 输入提供至少一个输入信号的四阶段版本。 在一个实施例中，耦合电路对输入信号执行离散傅里叶变换（DFT）。 在另一个实施例中，耦合电路对输入信号执行快速傅里叶变换（FFT）。 在另一个实施例中，由耦合电路执行的FFT实现Butler矩阵。

公开(公告)号：US07456772B2

公开(公告)日：2008-11-25

申请号：US11612551

申请日：2006-12-19

申请人： Paul Wilkinson Dent

发明人： Paul Wilkinson Dent

IPC分类号： H03M1/66

CPC分类号： H03M1/667

摘要： A fast, high resolution digital-to-analog converter (DAC) is described herein. The DAC comprises a pulse generator, decay circuit, controller, and sample circuit. The pulse generator serially outputs pulses representing digits of a digital word least significant digit first. Each pulse generates a response in the decay circuit that decays over time according to a known decay response. One exemplary decay circuit comprises an RC circuit having an exponential decay response. The controller controls the timing of the pulses output by the pulse generator such that the period of each pulse relates to a predetermined decay amount. The sample circuit samples an output of the decay circuit at a sample time after the decay circuit receives the pulse for the most significant digit. The sampled output represents the analog value corresponding to the input digital word. The digital word may have any length, radix, or format.

摘要翻译： 这里描述了一种快速，高分辨率的数模转换器（DAC）。 DAC包括脉冲发生器，衰减电路，控制器和采样电路。 脉冲发生器首先串行地输出表示数字字最低有效数字的数字的脉冲。 每个脉冲在衰减电路中产生响应，该响应根据已知的衰减响应随时间衰减。 一个示例性的衰减电路包括具有指数衰减响应的RC电路。 控制器控制由脉冲发生器输出的脉冲的定时，使得每个脉冲的周期与预定衰减量相关。 采样电路在衰减电路接收到最高有效位的脉冲后的采样时间对衰减电路的输出进行采样。 采样输出表示与输入数字字对应的模拟值。 数字字可能有任何长度，基数或格式。

公开(公告)号：US20080157881A1

公开(公告)日：2008-07-03

申请号：US11616598

申请日：2006-12-27

申请人： Paul Wilkinson Dent ,  Nikolaus Klemmer

发明人： Paul Wilkinson Dent ,  Nikolaus Klemmer

IPC分类号： H03L7/16 ,  H03L7/00 ,  H03B27/00

CPC分类号： H03L7/091 ,  H03L7/087 ,  H03L7/093

摘要： A frequency synthesizer according to the present invention digitally controls an analog oscillator to generate an analog output signal at a desired frequency. A digitizing circuit converts a feedback signal derived from the oscillator output signal to a digitized multi-phase feedback signal. A comparator compares the digitized multi-phase feedback signal to a reference signal generated by the reference signal generator to generate an error signal indicative of the phase error in the output signal. A control circuit generates a control signal based on the error signal to control the frequency of the oscillator output signal.

摘要翻译： 根据本发明的频率合成器数字地控制模拟振荡器以期望的频率产生模拟输出信号。 数字化电路将从振荡器输出信号导出的反馈信号转换为数字化的多相反馈信号。 比较器将数字化的多相反馈信号与由参考信号发生器产生的参考信号进行比较，以产生指示输出信号中的相位误差的误差信号。 控制电路根据误差信号产生控制信号，以控制振荡器输出信号的频率。

公开(公告)号：US20050074490A1

公开(公告)日：2005-04-07

申请号：US10744751

申请日：2003-12-23

申请人： Shun Lin ,  Lorraine Wearley ,  Dilip Gole ,  Gary Posage ,  Paul Wilkinson

发明人： Shun Lin ,  Lorraine Wearley ,  Dilip Gole ,  Gary Posage ,  Paul Wilkinson

IPC分类号： A61K9/02 ,  A61K9/00 ,  A61K9/08 ,  A61K9/19 ,  A61K9/20 ,  A61K9/22 ,  A61K9/24 ,  A61K47/26 ,  A61K47/34 ,  A61K47/36 ,  A61K47/42 ,  C08J3/00 ,  C08J3/21 ,  C08K5/00 ,  C08L101/00 ,  C08L101/14

CPC分类号： A61K9/2095 ,  A61K9/0034 ,  A61K9/209

摘要： The present invention provides a composition comprising a sustained release layer and a fast release layer. The sustained release layer comprises a water-soluble polymer and a first pharmaceutically active agent. The fast release layer comprises a matrix forming agent and a second pharmaceutically active agent. Generally, the composition provides fast and sustained (or controlled) release of a pharmaceutically active agent for at least 6 hours and preferably for at least 1 to 3 days. The composition may be incorporated into a dosage unit form, such as a vaginal insert. Methods of preparing the composition are also provided.

摘要翻译： 本发明提供包含缓释层和快速释放层的组合物。 持续释放层包含水溶性聚合物和第一药物活性剂。 快速释放层包含基质形成剂和第二种药物活性剂。 通常，组合物提供药物活性剂的快速和持续（或控制）释放至少6小时，优选至少1至3天。 组合物可以并入剂量单位形式，例如阴道插入物。 还提供了制备组合物的方法。

公开(公告)号：US06873613B1

公开(公告)日：2005-03-29

申请号：US09688770

申请日：2000-10-16

申请人： Paul Wilkinson Dent

发明人： Paul Wilkinson Dent

IPC分类号： H04B7/26 ,  H04L1/00 ,  H04B7/212 ,  H04J3/00 ,  H04Q7/20

CPC分类号： H04L1/0007 ,  H04B7/2659 ,  H04L1/0003

摘要： Data is wirelessly transmitted from a base station, and/or wirelessly received at a plurality of subscriber stations that are at a plurality of distances from the base station using a Time Division Multiple Access (TDMA) frame by transmitting a same amount of data to each of the subscriber stations at a same power level during the TDMA frame while varying at least one other parameter as a function of the distance of the respective subscriber station from the base station. The at least one other parameter may be an amount of error correction coding, a sub-period duration in the TDMA frame, a number of modulation symbols from a set of modulation symbols and/or a number of sub-periods of the TDMA frame.

摘要翻译： 数据是从基站无线地传送的，和/或在距离基站多个距离的多个用户站使用时分多址（TDMA）帧无线地接收，通过向每个用户站发送相同数量的数据到每个 在TDMA帧期间处于相同功率电平的用户站，同时根据相应用户站与基站的距离改变至少一个其它参数。 至少一个其它参数可以是纠错编码的量，TDMA帧中的子周期持续时间，来自一组调制符号的调制符号的数量和/或TDMA帧的子周期数。

公开(公告)号：US06393284B1

公开(公告)日：2002-05-21

申请号：US09672750

申请日：2000-09-28

申请人： Paul Wilkinson Dent

发明人： Paul Wilkinson Dent

IPC分类号： H04Q720

CPC分类号： H03J1/0075 ,  H04W48/16 ,  H04W88/06

摘要： Multiple-mode cellular radiotelephones use a wide bandwidth receiving mode while scanning for signals in a narrow bandwidth receiving mode. Thus, when it is desired to scan the received frequency band to search for the presence of narrowband signals, the wider receiver bandwidth is first selected. When significant signal energy is identified in the wider bandwidth, a further scan using the narrowband mode may then be provided in order to locate the narrow bandwidth channel containing the strongest signal. In another embodiment, the signals that are received in the wider bandwidth mode are digitized to obtain complex signal samples. The complex signal samples are then processed to determine energy in each of a plurality of narrower bandwidths corresponding to channels in the narrower bandwidth cellular radiotelephone standards. Accelerated scanning of TDMA cellular channels may be obtained by tuning the cellular radiotelephone to a succession of frequency channels within one TDMA time slot and measuring signal strength for each of the succession of frequency channels. Tuning and measuring is then repeated for remaining ones of the TDMA time slots in the TDMA frame, preferably using the same channels in the same order. For each frequency channel, the signal strength that is the greatest measured signal strength of the frequency channel in all of the TDMA slots is assigned to that frequency channel. The assigned signal strengths may then be used to select a frequency channel for TDMA signal acquisition. Historical information may also be used to accelerate scanning of cellular channels by a cellular radiotelephone.

摘要翻译： 多模式蜂窝无线电话机在窄带宽接收模式下扫描信号时使用宽带宽接收模式。 因此，当期望扫描接收的频带以搜索窄带信号的存在时，首先选择较宽的接收机带宽。 当在更宽的带宽中识别出有效信号能量时，可以提供使用窄带模式的进一步扫描，以便定位包含最强信号的窄带宽信道。 在另一个实施例中，以更宽带宽模式接收的信号被数字化以获得复信号采样。 然后处理复信号样本以确定对应于较窄带宽蜂窝无线电话标准中的信道的多个较窄带宽中的每一个中的能量。 TDMA蜂窝信道的加速扫描可以通过将蜂窝无线电话调谐到一个TDMA时隙内的一系列频率信道并且测量每个频率信道中的每一个的信号强度来获得。 然后对TDMA帧中剩余的TDMA时隙重复调谐和测量，优选以相同顺序使用相同的信道。 对于每个频道，将所有TDMA时隙中的频道的最大测量信号强度的信号强度分配给该频道。 所分配的信号强度然后可用于选择TDMA信号采集的频道。 历史信息也可用于通过蜂窝无线电话机加速对蜂窝通道的扫描。

公开(公告)号：US06369651B2

公开(公告)日：2002-04-09

申请号：US09814506

申请日：2001-03-22

申请人： Paul Wilkinson Dent

发明人： Paul Wilkinson Dent

IPC分类号： H03F304

CPC分类号： H03F3/211 ,  H02M3/1582 ,  H03F1/0227 ,  H03F1/0288 ,  H03F1/0294 ,  H03F3/602 ,  H03F2200/198 ,  H03F2200/324 ,  H03F2200/331 ,  H03F2200/336 ,  H03F2200/432 ,  H03F2200/504 ,  H03F2200/516 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2200/543 ,  H03F2203/21142 ,  H03G3/004 ,  H03G3/3042

摘要： Bidirectional Direct Current (DC) power conversion circuits and methods transfer DC power in a forward direction from a first terminal at a first voltage to a second terminal at a second voltage, wherein the first voltage is higher than the second voltage relative to a common voltage at a common terminal, and in a reverse direction from the second terminal at the second voltage to the first terminal at the first voltage. These bidirectional DC power conversion circuits and methods use an inductor having first and second inductor ends, a first switch that is connected between the first terminal and the first inductor end, to define a node therebetween, and a second switch that is connected between the node and the common terminal, wherein the second inductor end is connected to the second terminal. A switch controller or controlling method is configured to simultaneously close the first switch and open the second switch, to simultaneously open the first switch and close the second switch, and to maintain the first switch closed and the second switch open for a percentage of time that approximates a ratio of the second voltage to the first voltage. Power is thereby transferred from the second terminal to the first terminal when current flows from the first terminal to the second terminal, and power is thereby transferred from the first terminal to the second terminal when current flows from the second terminal to the first terminal.

摘要翻译： 双向直流（DC）功率转换电路和方法将第一电压的第一端子的直流电力以第二电压传递到第二端子，其中第一电压相对于公共电压高于第二电压 在公共端子处，并且在第二电压处的第二端子处于与第一电压处的第一端子相反的方向。 这些双向直流电力转换电路和方法使用具有第一和第二电感器端的电感器，连接在第一端子和第一电感器端之间的第一开关，以在其间限定一个节点，以及连接在节点之间的第二开关 和公共端子，其中第二电感器端连接到第二端子。 开关控制器或控制方法被配置为同时关闭第一开关并打开第二开关，以同时打开第一开关并闭合第二开关，并且保持第一开关闭合，并且第二开关保持一定百分比的时间， 近似第二电压与第一电压的比率。 从而当电流从第一端子流向第二端子时，电力从第二端子转移到第一端子，并且当电流从第二端子流到第一端子时，电力从而从第一端子传递到第二端子。

公开(公告)号：US06246870B1

公开(公告)日：2001-06-12

申请号：US09070289

申请日：1998-04-30

申请人： Paul Wilkinson Dent ,  Elizabeth Louise Humphreys

发明人： Paul Wilkinson Dent ,  Elizabeth Louise Humphreys

IPC分类号： H04Q720

CPC分类号： H04W4/24 ,  H04M15/00 ,  H04M15/8044 ,  H04M2215/32 ,  H04M2215/42 ,  H04M2215/745

摘要： In a multiple-mode communications terminal, such as a dual-mode analog/digital cellular radiotelephone, cumulative usage of communications units in multiple modes is measured for comparison to stored critical values of tariffs for each of the modes, and measures to control usage are initiated based on an economic efficiency of the multiple modes. More specifically, expenses incurred by a communications terminal that communicates with a first mobile radiotelephone system and a second mobile radiotelephone system are controlled by storing first and second critical values which characterize a tariff structure of the respective first and second mobile radiotelephone communication systems. Communications units used by the communications terminal are measured. An economic efficiency associated with use of the terminal to communicate with the first and second mobile radiotelephone communications systems is determined from the measured communications units and the first and second stored critical values. Measures are initiated to control communications usage with the first and second radiotelephone communications systems by the terminal based on the determined economic efficiency.

摘要翻译： 在诸如双模式/数字蜂窝无线电话机的多模式通信终端中，测量多个模式中的通信单元的累积使用量，以便与存储的每个模式的关税值进行比较，并且控制使用的措施是 基于多种模式的经济效益启动。 更具体地，通过存储表征相应的第一和第二移动无线电话通信系统的资费结构的第一和第二临界值来控制与第一移动无线电话系统和第二移动无线电话系统通信的通信终端所产生的费用。 测量通信终端使用的通信单元。 根据测量的通信单元和第一和第二存储的临界值确定与使用终端与第一和第二移动无线电话通信系统通信相关联的经济效率。 基于所确定的经济效率，启动措施以通过终端控制与第一和第二无线电话通信系统的通信使用。

公开(公告)号：US06201801B1

公开(公告)日：2001-03-13

申请号：US09033179

申请日：1998-03-02

申请人： Paul Wilkinson Dent

发明人： Paul Wilkinson Dent

IPC分类号： H04B7216

CPC分类号： H04W16/00 ,  H01Q1/246 ,  H01Q9/0421 ,  H01Q9/0428 ,  H01Q9/0435 ,  H01Q21/065 ,  H01Q21/08 ,  H01Q21/205 ,  H01Q21/24 ,  H04B7/06 ,  H04B7/086 ,  H04B7/10 ,  H04W16/24 ,  H04W16/28

摘要： A base station includes first and second antenna arrays for receiving first and second rotational polarizations, and a polarization diversity receiver connected to the first and second antenna arrays for processing respective first and second receive signals from a mobile station to generate an enhanced quality output receive signal based upon polarization diversity reception. Polarization isolation between the transmit and receive antenna elements may also provided by having a first plurality of transmit antenna elements for the second polarization mounted on a substrate carrying the first receive antenna elements. The second antenna array includes a second plurality of antenna elements of second polarization on a substrate carrying the second receive antenna elements. To achieve polarization diversity gain at the mobile station, the base station preferably further includes an alternating polarization transmitter for alternately transmitting signals at respective alternating first and second rotational polarizations. Method aspects of the invention are also disclosed.

摘要翻译： 基站包括用于接收第一和第二旋转极化的第一和第二天线阵列以及连接到第一和第二天线阵列的极化分集接收器，用于处理来自移动台的各自的第一和第二接收信号以产生增强的质量输出接收信号 基于偏振分集接收。 发射天线元件和接收天线元件之间的极化隔离也可以通过具有第一多个发射天线元件来提供，该第一多个发射天线元件用于安装在载有第一接收天线元件的衬底上的第二极化。 第二天线阵列包括在承载第二接收天线元件的衬底上的第二极化的第二多个天线元件。 为了在移动站实现偏振分集增益，基站优选地还包括交替极化发射器，用于在各自交替的第一和第二旋转极化下交替地发射信号。 还公开了本发明的方法方面。