专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20040240628A1 Ultrasonic transmitter, ultrasonic transceiver and sounding apparatus 有权
标题翻译：超声波发射机，超声波收发器和探测仪
公开(公告)号：US20040240628A1
公开(公告)日：2004-12-02
申请号：US10855481
申请日：2004-05-28
发明人： Tatsuo Hayashi
IPC分类号： H04B010/00 , H04B011/00 , H04B001/02 , H02N002/00 , H01L041/04 , H01L041/06 , H01L041/08 , H01L041/18
CPC分类号： G10K11/346 , B06B1/0238 , B06B1/0269 , B06B2201/74 , G01S7/521 , G01S7/524
摘要： A driver circuit for generating a driving pulse signal to activate a vibrating element includes a half-bridge circuit formed essentially of first and second switching devices to which drive signals are supplied through a driver interface. A driving voltage is supplied to a source of the first switching device, a drain of the second switching device is grounded, and an output terminal of the half-bridge circuit is connected to the vibrating element. The half-bridge circuit is controlled such that the two switching devices alternately turn ON. When the first switching device is ON, the driving voltage is supplied as the driving pulse signal to the vibrating element, and when the second switching device is ON, the vibrating element and the second switching device together form a low-impedance closed loop. As the switching devices are caused to alternately turn ON at specific intervals, the vibrating element vibrates at a natural resonant frequency, transmitting thereby an ultrasonic signal.
摘要翻译：用于产生驱动脉冲信号以激活振动元件的驱动电路包括基本上由第一和第二开关器件形成的半桥电路，驱动信号通过驱动器接口提供给驱动器电路。驱动电压被提供给第一开关装置的源极，第二开关装置的漏极接地，并且半桥电路的输出端子连接到振动元件。半桥电路被控制，使得两个开关装置交替地接通。当第一开关器件为ON时，将驱动电压作为驱动脉冲信号提供给振动元件，并且当第二开关器件导通时，振动元件和第二开关器件一起形成低阻抗闭环。由于开关器件以特定的间隔交替地接通，所以振动元件以固有的谐振频率振动，由此发送超声波信号。

2. 发明申请

US20040219892A1 Techniques for correcting for phase and amplitude offsets in a mimo radio device 失效
标题翻译：用于校正mimo无线电设备中的相位和幅度偏移的技术
公开(公告)号：US20040219892A1
公开(公告)日：2004-11-04
申请号：US10859255
申请日：2004-06-02
发明人： Chandra Vaidyanathan , Gary L. Sugar
IPC分类号： H04B001/02 , H03C007/02 , H04B007/02 , H04B001/04 , H04B001/06 , H04B007/00
CPC分类号： H04B7/04 , H01Q3/2605 , H04B1/0003 , H04B1/0475 , H04B1/0483 , H04B17/21
摘要： Techniques to correct for phase and amplitude mismatches in a radio device in order to maintain channel symmetry when communicating with another device using MIMO radio communication techniques. Correction for the amplitude and phase mismatches among the plurality of transmitters and plurality of receivers of a device may be made at baseband using digital logic (such as in the modem) in the receiver path, the transmitter path or both paths of that device. In a device, amplitude and phase offsets are determined among the plurality of radio transmitter and radio receiver paths by measuring phase and amplitude responses when supplying a signal to a transmitter in a first antenna path of the device and coupling the radio signal from a first antenna to a second antenna path of that device where the signal is downconverted by a receiver associated with the second antenna path, and similarly coupling a signal from the second antenna path to the first antenna path. Measurements are obtained between the first antenna path and each of the other antenna paths when coupling a signal in both directions between them. Phase and amplitude offset correction values are computed from the phase and amplitude measurements during a self-calibration operation or mode of the device, and are used during a run-time operation or mode when processing the baseband transmit and/or receive signals to compensate for the phase and amplitude offsets among the plurality of transceiver paths of a device. Amplitude offset correction may not be necessary (or optional) for certain radio implementations or MIMO radio algorithms. The device may execute the self-calibration mode on device power-up, and then periodically thereafter. Self-calibration may also be performed at the factory on a device.
摘要翻译：用于校正无线电设备中的相位和幅度失配的技术，以便在使用MIMO无线电通信技术与另一设备通信时保持信道对称性。在设备的多个发射机和多个接收机之间的幅度和相位不匹配的校正可以使用数字逻辑（例如在调制解调器中）在接收机路径，发射机路径或该设备的两个路径中进行。在设备中，通过在设备的第一天线路径中向发射机提供信号并且将来自第一天线的无线电信号耦合时测量相位和幅度响应，在多个无线电发射机和无线电接收机路径中确定幅度和相位偏移到该设备的第二天线路径，其中信号由与第二天线路径相关联的接收机下变频，并且类似地将来自第二天线路径的信号耦合到第一天线路径。当在它们之间的两个方向上耦合信号时，在第一天线路径和每个其他天线路径之间获得测量。在设备的自校准操作或模式期间，从相位和幅度测量中计算相位和幅度偏移校正值，并且在处理基带发射和/或接收信号的运行时操作或模式期间使用相位和振幅偏移校正值，以补偿设备的多个收发器路径之间的相位和幅度偏移。某些无线电实现或MIMO无线电算法可能不需要（或可选）幅度偏移校正。设备可以在设备上电时执行自校准模式，然后定期执行。自校准也可以在工厂在设备上进行。

3. 发明申请

US20040203539A1 Method and mobile station for autonomously determining an angle of arrival (AOA) estimation 有权
标题翻译：用于自主确定到达角（AOA）估计的方法和移动站
公开(公告)号：US20040203539A1
公开(公告)日：2004-10-14
申请号：US10316692
申请日：2002-12-11
发明人： Stanley J. Benes , Lawrence Downing , Gerald Gutowski
IPC分类号： H04B001/02 , H03C007/02 , H04B007/02 , H03C001/62 , H04B017/00
CPC分类号： H04W64/00 , H04W16/24
摘要： A method (900) and a mobile station (160) for autonomously determining an angle of arrival (AOA) estimation are described herein. The mobile station (160) may receive information associated with a plurality of sectors (200) from a base station (140) having a plurality of antennas. Each of the plurality of antennas may provide communication service to one of the plurality of sectors (200). The information associated with the plurality of sectors (200) may be an antenna pattern, a boresight, a downtilt, and a signal strength value associated with each of the plurality of antennas. Based on the information associated with the plurality of sectors (200), the mobile station (160) may determine an antenna gain difference, which in turn, is used to determine the angle of arrival (AOA) estimation.
摘要翻译：本文描述了用于自主确定到达角（AOA）估计的方法（900）和移动台（160）。移动站（160）可以从具有多个天线的基站（140）接收与多个扇区（200）相关联的信息。多个天线中的每一个可以向多个扇区（200）之一提供通信服务。与多个扇区（200）相关联的信息可以是与多个天线中的每一个相关联的天线方向图，视轴，下倾角和信号强度值。基于与多个扇区（200）相关联的信息，移动站（160）可以确定天线增益差异，其又被用于确定到达角（AOA）估计。

4. 发明申请

US20040192230A1 Duplexer structure for coupling a transmitter and a receiver to a common antenna 审中-公开
公开(公告)号：US20040192230A1
公开(公告)日：2004-09-30
申请号：US10819024
申请日：2004-04-06
申请人： Intel Corporation
发明人： Luiz M. Franca-Neto
IPC分类号： H04B001/44 , H03C007/02 , H04B001/02
CPC分类号： H04B1/52
摘要： A duplexer structure for allowing an RF transmitter and an RF receiver to share a common antenna includes impedance matching circuitry to match the receiver input impedance to the antenna impedance during a receive operation and impedance transformation circuitry to transform the antenna impedance to a lower impedance at the receiver input terminals during a transmit operation. The impedance matching circuitry and the impedance transformation circuitry of the duplexer share one or more passive components, thus reducing the overall number of components required to implement the duplexer. This reduction in component count reduces the amount of chip area required to implement the duplexer and increases the ease with which the RF transceiver is integrated onto a semiconductor chip. In one embodiment, the duplexer uses a differential topology to provide common mode noise rejection and even harmonic distortion cancellation within a transceiver.

5. 发明申请

US20040185908A1 Apparatus and method for controlling amplifier to save power 审中-公开
标题翻译：用于控制放大器以节省电力的装置和方法
公开(公告)号：US20040185908A1
公开(公告)日：2004-09-23
申请号：US10775089
申请日：2004-02-11
发明人： Suk-Kyun Hur
IPC分类号： H04B001/02
CPC分类号： H04B1/0483 , H04B1/1615 , H04W52/0206 , H04W52/0254 , H04W88/08 , Y02D70/40
摘要： A method and apparatus for controlling amplifiers to save power are provided. In a method of controlling at least two amplifiers provided in a BS, for amplifying transmitted signals to an MS, the BS decides an amplifier to be enabled or disabled between the at least two amplifiers, and enables or disables the decided amplifier.
摘要翻译：提供了一种用于控制放大器以节省功率的方法和装置。在一种控制在BS中提供的至少两个放大器的方法中，用于将传输的信号放大到MS，BS决定在至少两个放大器之间使能或禁用放大器，并使能或禁止所决定的放大器。

6. 发明申请

US20040185792A1 Method of compensating for correlation between multiple antennas 有权
标题翻译：补偿多个天线之间的相关性的方法
公开(公告)号：US20040185792A1
公开(公告)日：2004-09-23
申请号：US10621425
申请日：2003-07-17
发明人： Angeliki Alexiou , Mohammed Qaddi
IPC分类号： H04B001/02
CPC分类号： H04L1/0618
摘要： A method is provided of transmitting signals from two or more antennas in a wireless telecommunications network, in which at least one data sequence is space-time block encoded. Before transmitting the data sequence, a linear transformation is applied to the data sequence, the linear transformation being adapted to use knowledge of correlation among the antennas to at least partially compensate the transmitted signals for said correlation. The linear transformation depends on the eigenvalues of an antenna correlation matrix. The linear transformation further depends on a ratio of symbol energy (ES) to noise variance (null2). The method includes transmitting the encoded and transformed data sequence.
摘要翻译：提供了一种从无线电信网络中的两个或多个天线发射信号的方法，其中至少一个数据序列被空间 - 时间块编码。在发送数据序列之前，对数据序列进行线性变换，线性变换适于使用天线之间的相关知识来至少部分地补偿用于所述相关的发射信号。线性变换取决于天线相关矩阵的特征值。线性变换进一步取决于符号能量（ES）与噪声方差（sigma <2>）的比值。该方法包括发送编码和变换的数据序列。

7. 发明申请

US20040180695A1 Site diversity transmission/reception apparatus, base station, and mobile station 失效
标题翻译：站点分集发送/接收设备，基站和移动站
公开(公告)号：US20040180695A1
公开(公告)日：2004-09-16
申请号：US10482482
申请日：2003-12-31
发明人： Hiroyasu Sano
IPC分类号： H04B001/02
CPC分类号： H04L1/0069 , H04L1/0003 , H04L1/0009 , H04L1/0013 , H04L1/0015 , H04L1/0066 , H04L1/0071 , H04L1/06 , H04L2001/0092
摘要： A setting unit (4) determines basic information on a modulation method, a coding ratio, and a puncturing rule based on a quality signal at each base station (5) that is measured at a mobile station (12). A transmission control unit (6) of each base station (5) determines the modulation method, the coding ratio, and the puncturing rule for each of the base stations (5) according to the basic information and the signal quality of each base station (5). Based on this determination, a code selection unit (7) executes puncturing, an interleave unit (8) executes interleave, and a modulation unit (9) executes modulation. In the mobile station (12), based on the modulation method, the coding ratio, and the puncturing rule included in a control signal from each base station, a demodulation unit (15) executes a demodulation processing, a deinterleave unit (16) executes a deinterleave processing, and a code combining unit (17) executes code combining.
摘要翻译：设置单元（4）基于在移动站（12）处测量的每个基站（5）处的质量信号来确定关于调制方法，编码比率和打孔规则的基本信息。每个基站（5）的发送控制单元（6）根据基站信息和每个基站的信号质量来确定每个基站（5）的调制方法，编码率和删截规则（ 5）。基于该确定，代码选择单元（7）执行删截，交织单元（8）执行交织，并且调制单元（9）执行调制。在移动台（12）中，解调部（15）基于来自各基站的控制信号中的调制方式，编码率和删截规则，执行解调处理，解交织部（16）执行解交织处理和代码组合单元（17）执行代码组合。

8. 发明申请

US20040171358A1 Data transmission method, base station and transmitter for compensating for non-linearities in a transmission chain 有权
标题翻译：数据传输方法，基站和发射机，用于补偿传输链中的非线性
公开(公告)号：US20040171358A1
公开(公告)日：2004-09-02
申请号：US10630975
申请日：2003-07-31
发明人： Miia Karjalainen , Samu Saarinen , Kauko Heinikoski , Teemu Tolonen , Juha Ylinen , Jani Suonpera , Risto Lehtinen
IPC分类号： H04B001/02 , H04B001/04
CPC分类号： H03F1/3247 , H04B1/0475
摘要： A transmitter compensates for the non-linearities within a transmission chain. The transmitter includes, for instance, a first forming device for forming, on the basis of at least one set of signal properties, at least one state expansion vector comprising quantities characterizing a signal. The transmitter includes a modifier for modifying the signal characterizing quantities of at least one state expansion vector with the at least one time-domain compensation parameter vector and with the at least one frequency-domain compensation parameter vector to form a pre-distorted signal. The transmitter includes a second forming device for forming a feedback signal from an output signal of a transmission chain. The transmitter includes an adapter for adapting at least one time-domain compensation parameter vector for adapting at least one frequency-domain compensation parameter vector based on a residual error between a transmit signal and the feedback signal.
摘要翻译：发射机补偿传输链中的非线性。发射机包括例如第一形成装置，用于基于至少一组信号特性形成包括表征信号的量的至少一个状态扩展矢量。所述发射机包括修改器，用于利用所述至少一个时域补偿参数向量和所述至少一个频域补偿参数向量来修改至少一个状态扩展向量的信号特征量，以形成预失真信号。发射机包括用于从传输链的输出信号形成反馈信号的第二形成装置。发射机包括用于适配至少一个时域补偿参数向量的适配器，用于基于发射信号和反馈信号之间的残余误差来适配至少一个频域补偿参数矢量。

9. 发明申请

US20040166819A1 Dual-mode transmitter 失效
标题翻译：双模发射机
公开(公告)号：US20040166819A1
公开(公告)日：2004-08-26
申请号：US10735525
申请日：2003-12-11
发明人： George E. Derome , Brad R. Butterworth , Thomas Macone
IPC分类号： H04B001/02
CPC分类号： G08G1/0965 , B61L29/246 , H04B1/406
摘要： An emergency and non-emergency transmitter receivable by broadcast band receivers in nearby vehicles, comprising a first signal generator for simultaneously providing a plurality of selectively spaced carriers having frequency spacings corresponding to the individual channels of the band to be covered and selectively providing amplitude modulation when used for the AM broadcast band, and a second signal generator providing an FM modulated signal, which when combined with the signal from the first signal generator, covers various portions of the FM broadcast band to provide complete coverage thereof. A plurality of signals are generated in a portion of a selected band and modulated, according to the selected band mode, with a pre-stored and selectable voice alarm message. An EAS/RDS decoder monitors for emergency transmissions and deactivates the dual-mode transmitter if an EAS/RDS transmission is detected so that radios within the coverage area of the dual-mode transmitter will receive the EAS/RDS transmission.
摘要翻译：由邻近车辆中的广播频带接收机接收的紧急和非紧急发射机包括：第一信号发生器，用于同时提供多个选择性间隔的载波，其具有对应于要覆盖的频带的各个信道的频率间隔，并且当用于AM广播频带，以及第二信号发生器，其提供FM调制信号，当与第一信号发生器的信号组合时，FM调制信号覆盖FM广播频带的各个部分以提供完整的覆盖。在所选频带的一部分中产生多个信号，并根据所选择的频带模式，利用预先存储和可选择的语音报警消息进行调制。如果检测到EAS / RDS传输，则EAS / RDS解码器监视紧急传输并停用双模式发射机，使得双模式发射机的覆盖区域内的无线电台将接收到EAS / RDS传输。

10. 发明申请

US20040162038A1 Method for detecting quadrature modulator carrier leak adjusting point by geometrical analysis/calculation method, carrier leak adjusting method, and quadrature modulation apparatus 失效
标题翻译：通过几何分析/计算方法，载波泄漏调整方法和正交调制装置检测正交调制器载波泄漏调整点的方法
公开(公告)号：US20040162038A1
公开(公告)日：2004-08-19
申请号：US10474391
申请日：2003-10-09
发明人： Norio Kanazawa , Masahiro Tsuchiya
IPC分类号： H01Q011/12 , H04B001/04 , H04B001/02
CPC分类号： H03C3/406 , H03C3/40 , H04L27/364 , H04L2027/0016
摘要： The first, second, and third pairs of DC voltages which set a modulated signal to a predetermined reference level while the levels of I and Q signals supplied to a quadrature modulator are set at null0null are sequentially obtained. On the basis of the first, second, and third pairs of DC voltages, at least three measurement points based on a combination of pairs of DC voltages which set the level of the modulated signal to the predetermined reference level are decided. The coordinates of the center of a virtual circle having the three measurement points positioned on its circumference are automatically calculated by a geometric analytical computation. Adjustment voltages to be added to the I and Q signals so as to cancel out a carrier leak contained in the modulated signal are obtained from the coordinates of the center.
摘要翻译：依次获得将提供给正交调制器的I和Q信号的电平设置为“0”的第一，第二和第三对直流电压，其将调制信号设置为预定参考电平。基于第一，第二和第三对直流电压，基于将调制信号的电平设置为预定参考电平的直流电压组合的至少三个测量点被确定。通过几何分析计算自动计算具有位于其圆周上的三个测量点的虚拟圆的中心坐标。从中心的坐标得到调整电压加到I和Q信号上，以抵消包含在调制信号中的载波泄漏。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式