公开(公告)号：WO2009042060A3

公开(公告)日：2009-04-02

申请号：PCT/US2008/010854

申请日：2008-09-18

Applicant: M/A-COM, INC. ,  ZHANG, Wen, Hui ,  WEIGAND, Christopher

Inventor： ZHANG, Wen, Hui ,  WEIGAND, Christopher

IPC: H03H11/24 ,  H01P1/22

Abstract: Various embodiments are directed to providing constant phase digital attenuation. In one embodiment, a digital attenuator circuit (100) comprises an input node (102) to receive an input signal to be attenuated, an output node (104) to output an attenuated signal, a reference loss path (106) between the input node (102)and the output node (104), and an attenuation path (108) between the input node (102)and the output node (104). The reference loss path (106) comprises switching elements and matching circuitry to improve Voltage Standing Wave Ratio (VSWR), and the attenuation path (108) comprises switching elements and attenuating circuitry to attenuate the input signal when the digital attenuator circuit (100) is switched from a reference loss state to an attenuation state. An effective phase length of the reference loss path (106) and an effective phase length of the attenuation path (108) may be equalized to provide a constant phase when the digital attenuator circuit (100) is switched between states.

公开(公告)号：WO2008021047A1

公开(公告)日：2008-02-21

申请号：PCT/US2007/017457

申请日：2007-08-06

Applicant: M/A-COM, INC. ,  JANKY, William, Oscar ,  HENGEVELD, Thomas, Andrew ,  MARTINEZ, Dennis, Michael

Inventor： JANKY, William, Oscar ,  HENGEVELD, Thomas, Andrew ,  MARTINEZ, Dennis, Michael

IPC: H04Q7/30

CPC classification number: H04W88/181

Abstract: A transcoder architecture and method for transcoding in land mobile radio (LMR) systems are provided. The LMR system (20) includes a first communication site configured to communicate using a first LMR communication protocol and a second communication site configured to communicate using a second LMR communication protocol. The LMR system further includes a transcoder (28) configured to receive LMR content from the first communication site communicated using the first LMR communication protocol and digitally convert the LMR content to the second LMR communication protocol to be communicated to the second communication site.

Abstract translation: 提供了一种用于陆地移动无线电（LMR）系统中转码的转码器架构和方法。 LMR系统（20）包括被配置为使用第一LMR通信协议进行通信的第一通信站点和被配置为使用第二LMR通信协议进行通信的第二通信站点。 所述LMR系统还包括代码转换器（28），其被配置为从使用所述第一LMR通信协议传送的所述第一通信站点接收LMR内容，并将所述LMR内容数字转换为要传送到所述第二通信站点的所述第二LMR通信协议。

公开(公告)号：WO2005064789A1

公开(公告)日：2005-07-14

申请号：PCT/US2004/042933

申请日：2004-12-21

Applicant: M/A-COM, INC.

Inventor： JENKINS, Alan, Peter

IPC: H03F3/19

CPC classification number: H03F1/0261 ,  H03F2203/7209

Abstract: The invention is directed to a system for electromagnetic communications that includes a semiconductor die; at least one amplifier on the die to amplify an input signal and generate an output signal; and an active bias control component on the die for adjusting biasing of the amplifier so that the amplifier is operable in a plurality of frequency bands. In one embodiment, a PCS band and W-CDMA power amplifier may be integrated on the same power amplifier die, and different output power requirements may be addressed by the use of an Si DC-DC converter. Such a converter may provide efficiency enhancements to the overall system through the use of dynamic bias control under active power control situations from the network. In addition, the converter may be used in a voltage up-converter state that allows a W-CDMA optimized power amplifier to operate at PCS frequencies and output power levels.

Abstract translation: 本发明涉及一种包括半导体管芯的电磁通信系统; 芯片上的至少一个放大器，用于放大输入信号并产生输出信号; 以及用于调整放大器的偏置的芯片上的有源偏置控制部件，使得放大器可在多个频带中操作。 在一个实施例中，PCS频带和W-CDMA功率放大器可集成在相同的功率放大器管芯上，并且通过使用Si DC-DC转换器可以解决不同的输出功率要求。 这样的转换器可以通过在来自网络的有功功率控制情况下使用动态偏置控制来提供整个系统的效率增强。 此外，转换器可以用于允许W-CDMA优化的功率放大器在PCS频率和输出功率电平下工作的电压上变换器状态。

公开(公告)号：WO2004095799A3

公开(公告)日：2004-11-04

申请号：PCT/US2004/011658

申请日：2004-04-14

Applicant: M/A-COM, INC.

Inventor： RODERIQUE, William, John

IPC: H04L29/06

Abstract: A proxy is utilized to limit the RF bandwidth needed for foreign IP registration. An existing RF login procedure causes the proxy to initiate and complete the foreign IP registration procedure with the foreign agent at the RF site where the mobile node is located. The proxy then acts as a locally connected (i.e., direct ethernet connected) device for each IP address for which it is proxying, and thus there is no need to use RF to register a mobile with the active foreign agent. This allows the use of off-the-shelf home and foreign agents to complete the mobile IP architecture, and reduces the RF bandwidth used, since the RF portion of the registration process (the registration between the active foreign agent and the mobile) is reduced.

公开(公告)号：WO2004034664A2

公开(公告)日：2004-04-22

申请号：PCT/US2003/032023

申请日：2003-10-07

Applicant: M/A-COM, INC.

Inventor： AHMED, Walid, Khairy, Mohamed

IPC: H04L25/02

CPC classification number: H03C3/40 ,  H03H17/0202 ,  H04L27/361

Abstract: Apparatus, methods and articles of manufacture are disclosed for modifying electromagnetic waves by reducing noise in those waves. A transfer function for a plurality of segments is derived through identifying a desired output parameter. That transfer function is then applied, via a plurality of filters or other devices, to a wave, in order to achieve said transfer function.

Abstract translation: 公开了用于通过降低那些波中的噪声来修改电磁波的装置，方法和制品。 通过识别期望的输出参数导出多个段的传递函数。 然后，通过多个滤波器或其他装置将该传递函数应用于波，以实现所述传递函数。

公开(公告)号：WO2004034603A2

公开(公告)日：2004-04-22

申请号：PCT/US2003/031779

申请日：2003-10-07

Applicant: M/A-COM, Inc.

Inventor： DENNIS, Anthony ,  YANG, Yongwen ,  HUSSEINI, Radwan, Mohamad, Reda ,  BENGTSON, David, Eric

IPC: H04B1/40

CPC classification number: H03F3/24 ,  H04L27/0008 ,  H04L27/361

Abstract: A transmitter comprises a baseband processor, a wideband phase modulator and an amplitude modulated amplifier. A signal is provided through the baseband processor and is converted into polar coordinates, comprised of amplitude and phase components, with the amplitude component being transmitted to the amplitude modulated amplifier. The amplitude modulated amplifier being comprised of independently controllable current sources, and with the phase component being transmitted to the wideband phase modulator, for modulation upon a carrier wave, and subsequent transmission to the amplitude modulated amplifier for amplification according to control imposed by the amplitude component upon the current sources.

Abstract translation: 发射机包括基带处理器，宽带相位调制器和幅度调制放大器。 通过基带处理器提供信号，并将其转换成包括幅度和相位分量的极坐标，幅度分量被传送到幅度调制放大器。 幅度调制放大器由可独立控制的电流源组成，并且相位分量被传输到宽带相位调制器，用于在载波上进行调制，随后根据幅度分量施加到幅度调制放大器进行放大 目前来源。

公开(公告)号：WO2004034571A1

公开(公告)日：2004-04-22

申请号：PCT/US2003/031984

申请日：2003-10-08

Applicant: M/A-COM, INC. ,  M/A-COM EUROTEC, BV

Inventor： MCGRATH, Finbarr, Joseph ,  NAGLE, Pierce, Joseph

IPC: H03F1/02

CPC classification number: H03F1/0277

Abstract: Apparatus, methods and articles of manufacture are shown for modifying electromagnetic waves. Through using various wave characteristics such as amplitude to regulate a current source, a current is output that may be used in any number of ways, such as driving an antenna or other load.

Abstract translation: 显示了用于修改电磁波的装置，方法和制品。 通过使用诸如幅度的各种波特性来调节电流源，输出可以以任何数量的方式使用的电流，例如驱动天线或其它负载。

公开(公告)号：WO2009134453A1

公开(公告)日：2009-11-05

申请号：PCT/US2009/002731

申请日：2009-04-29

Applicant: M/A-COM, INC. ,  SETO, Nelson ,  MONNES, Peter ,  HENGEVELD, Thomas, Andrew

Inventor： SETO, Nelson ,  MONNES, Peter ,  HENGEVELD, Thomas, Andrew

IPC: H04W72/12 ,  H04W76/04

CPC classification number: H04W76/25 ,  H04L43/103 ,  H04L67/14 ,  H04L67/145 ,  H04L67/306

Abstract: A system and method for heartbeat signal generation are provided. The method (30) includes determining (38) a communication condition and generating (42) heartbeat signals based on the determined communication condition. The system (20) includes a plurality of communication cells (26) and at least one communication device (28) configured to generate heartbeat signals. A rate of generating the heartbeat signals is based on one of (i) a service priority or user group and (ii) communication requirements for a network type for each of the plurality of communication cells.

Abstract translation: 提供了用于产生心跳信号的系统和方法。 方法（30）包括基于所确定的通信条件确定（38）通信条件并生成（42）心跳信号。 系统（20）包括多个通信单元（26）和被配置为产生心跳信号的至少一个通信设备（28）。 产生心跳信号的速率基于（i）服务优先级或用户组中的一种，以及（ii）针对多个通信小区中的每一个的网络类型的通信要求。

公开(公告)号：WO2008106068A1

公开(公告)日：2008-09-04

申请号：PCT/US2008/002420

申请日：2008-02-25

Applicant: M/A-COM, INC. ,  MARTINEZ, Dennis, Michael

Inventor： MARTINEZ, Dennis, Michael

IPC: H04L12/18 ,  H04Q7/28

CPC classification number: H04L12/189 ,  H04L29/12292 ,  H04L61/2069 ,  H04W4/10 ,  H04W76/45

Abstract: A method for radio frequency multicasting and a multicast site architecture (60) are provided. The method includes assigning a different traffic multicast Internet Protocol (IP) address (70, 72) to each of a plurality of groups of LMR users and encapsulating the LMR content (61) within IP packets (67, 65, 63). The method further includes transmitting the IP packets (67, 65, 63) to one of the plurality of groups of LMR users using at least one of the assigned traffic multicast IP addresses (70, 72). A control plane (66) may be defined which communicates call control and signalling information using a control multicast IP address (68).

Abstract translation: 提供了一种用于射频组播和多播站点架构（60）的方法。 该方法包括向LMR用户的多个组中的每一个分配不同的业务组播互联网协议（IP）地址（70,72），并将LMR内容（61）封装在IP分组（67,65,63）内。 该方法还包括使用分配的业务多播IP地址（70,72）中的至少一个，将IP分组（67,65,63）发送到多组LMR用户之一。 可以定义控制平面（66），其使用控制多播IP地址（68）来传送呼叫控制和信令信息。

公开(公告)号：WO2008076233A1

公开(公告)日：2008-06-26

申请号：PCT/US2007/025131

申请日：2007-12-07

Applicant: M/A-COM, INC. ,  AHMED, Walid, Khairy, Mohamed ,  LI, Qing

Inventor： AHMED, Walid, Khairy, Mohamed ,  LI, Qing

IPC: H03F1/32

CPC classification number: H03F1/3247

Abstract: A method and apparatus for a nonlinear feedback control system is disclosed, such as for electrical and electronic systems, for pre-distorting a nonlinear device (106, 207, 220, 222). A nonlinear feedback control system includes a nonlinear device (106, 207, 220, 222) having a first input and a first output. A detection stage (108, 209) is in communication with the first output of the nonlinear device (106, 207, 220, 222). A derivation stage (104, 205) is in communication with the detection stage (108, 209), and the derivation stage (104, 205) is in communication with the first input of the nonlinear device (106, 207, 220, 222).

Abstract translation: 公开了一种用于非线性反馈控制系统的方法和装置，例如用于电气和电子系统，用于对非线性装置（106,207,220,222）进行预失真。 非线性反馈控制系统包括具有第一输入和第一输出的非线性装置（106,207,220,222）。 检测级（108,209）与非线性装置（106,207,220,222）的第一输出端通信。 派生级（104,205）与检测级（108,209）通信，并且导出级（104,205）与非线性器件（106,207,220,222）的第一输入端通信， 。