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公开(公告)号：US06768398B2
公开(公告)日：2004-07-27
申请号：US10021636
申请日：2001-12-12
申请人： Edgar Herbert Callaway, Jr. , Raymond Louis Barrett, Jr. , Gilberto Jacinto Hernandez , Douglas Harold Weisman
发明人： Edgar Herbert Callaway, Jr. , Raymond Louis Barrett, Jr. , Gilberto Jacinto Hernandez , Douglas Harold Weisman
IPC分类号： H01P1203
CPC分类号： H01P1/2039
摘要： A transmission line (218) is formed to have a characteristic impedance which increases at a first substantially exponential rate with respect to a distance from the input (202). A plurality of resonators (206-214) are coupled to the transmission line and positioned at a plurality of locations along the transmission line. The plurality of resonators has resonant frequencies that decrease at a second substantially exponential rate with respect to the distance from the input. An output signal (810, 812) is obtained at a point in the filter that produces a filter response having a corner frequency.
摘要翻译： 传输线（218）被形成为具有相对于距离输入（202）的距离以第一基本指数速率增加的特性阻抗。 多个谐振器（206-214）耦合到传输线并且位于沿着传输线的多个位置处。 多个谐振器具有相对于与输入的距离以相对于第二基本指数速率降低的谐振频率。 在产生具有拐角频率的滤波器响应的滤波器中的点处获得输出信号（810,812）。
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公开(公告)号：US07277457B2
公开(公告)日：2007-10-02
申请号：US10678416
申请日：2003-10-03
IPC分类号： H04J3/06
CPC分类号： H04L27/0014 , H04L7/04 , H04L2027/0026 , H04L2027/0083 , H04W56/0035 , Y02D70/00 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/22
摘要： A method (500) and system for compensation of frequency offset between a first transceiver (102) and a second transceiver (104) in wireless communication are disclosed. The compensation of the frequency offset between two or more transceivers (102, 104) is achieved using frequency synchronization bursts. These bursts contain information about the frequency offset. The frequency synchronization bursts are transmitted by the first transceiver at a range of frequencies above and below its carrier frequency (502). A second transceiver that receives at least one of these bursts (504) determines the frequency offset (504), and adjusts its frequency to match the frequency of the first transceiver (508). Thereafter, the second transceiver may enter a low power sleep mode (510) in order to reduce its power consumption. The second transceiver returns to active mode (512) just before the start of the transmission of the data packets (514).
摘要翻译： 公开了一种用于在无线通信中补偿第一收发器（102）和第二收发器（104）之间的频率偏移的方法（500）和系统。 使用频率同步脉冲串实现两个或多个收发器（102,104）之间的频率偏移的补偿。 这些突发包含有关频率偏移的信息。 频率同步突发由第一收发器在其载波频率（502）之上和之下的频率范围内传输。 接收这些突发（504）中的至少一个的第二收发器确定频率偏移（504），并且调整其频率以匹配第一收发器（508）的频率。 此后，第二收发器可以进入低功率休眠模式（510），以便降低其功耗。 第二收发器在数据分组（514）的发送开始之前返回到活动模式（512）。
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公开(公告)号：US07016661B2
公开(公告)日：2006-03-21
申请号：US10683098
申请日：2003-10-10
IPC分类号： H04B1/10
CPC分类号： H04B1/406 , H04L2027/0065
摘要： The present invention provides a multimode receiver design for mitigation of frequency offset by selective demodulation of an input modulated signal. The receiver (103) comprises a plurality of demodulators (207). Each of the plurality of demodulators (207) has the same functionality but different receiver sensitivity versus frequency-offset mitigation characteristics. Each of these demodulators incorporates a different demodulation technique. A suitable demodulator is selected to demodulate the received signal. The choice of a suitable demodulator is based on the value of the frequency offset (305, 307).
摘要翻译： 本发明提供一种多模接收机设计，用于通过对输入调制信号的选择性解调来减轻频偏。 接收器（103）包括多个解调器（207）。 多个解调器（207）中的每一个具有相同的功能，但是具有不同的接收机灵敏度与频偏抑制特性。 这些解调器中的每一个都包含不同的解调技术。 选择合适的解调器来解调所接收的信号。 合适的解调器的选择基于频率偏移的值（305,307）。
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公开(公告)号：US5734974A
公开(公告)日：1998-03-31
申请号：US625435
申请日：1996-03-27
申请人： Edgar Herbert Callaway, Jr. , James Gregory Mittel , Vance Howard Peterson , Burkhard Dick , Knud Holtvoeth , Wilfried Knop
发明人： Edgar Herbert Callaway, Jr. , James Gregory Mittel , Vance Howard Peterson , Burkhard Dick , Knud Holtvoeth , Wilfried Knop
CPC分类号： H03G3/3073 , H03G1/0088
摘要： A receiver (100) for receiving an input signal and generating an output signal therefrom has a switchable gain circuit (104) with a stepwise variable gain control (118), a local oscillator (106) and an automatic gain control (AGC) detector (114) with a response for detecting a level of the output signal and generating an AGC signal indicative of the level of the output signal and a state machine (116) being responsive to the AGC signal generating a control signal at the stepwise variable gain control to increase or decrease a gain of the switchable gain circuit in discrete stepwise steps.
摘要翻译： 一种用于接收输入信号并从其产生输出信号的接收器（100）具有带有逐步可变增益控制（118），本地振荡器（106）和自动增益控制（AGC）检测器（118）的可切换增益电路（104） 114），具有用于检测输出信号的电平并产生指示输出信号的电平的AGC信号的响应，以及状态机（116）响应于在步进可变增益控制下产生控制信号的AGC信号， 在离散步进步骤中增加或减少可切换增益电路的增益。
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5.发明授权System and method for asynchronous communications employing direct and indirect access protocols 有权采用直接和间接访问协议的异步通信系统和方法公开(公告)号：US07133398B2
公开(公告)日：2006-11-07
申请号：US10108116
申请日：2002-03-27
申请人： Vernon Anthony Allen , Stephen Raphael Korfhage , Monique Bourgeois Brown , Edgar Herbert Callaway, Jr.
发明人： Vernon Anthony Allen , Stephen Raphael Korfhage , Monique Bourgeois Brown , Edgar Herbert Callaway, Jr.
摘要： A communication access protocol improves the accessibility of devices operating on an asynchronous network (100), while supporting reduced power consumption. The network (100) includes a mediation device (130) for facilitating communications among network devices. Generally, each network device periodically transmits beacon signals to advertise its presence, and listens for communication signals targeted at the network device (532, 534). A device initiating communication with another operates in one of at least two operating modes in order to establish communications (536, 537, 538). In one mode, the initiating device communicates with the mediation device in order to derive timing information for the other device (537). In another mode, the initiating device listens to receive beacon signals directly from the target device in order to synchronize communications with the device (538). The selection of one of the two operating modes depends on a control parameter established for the initiating device, which in one embodiment is dependent on the urgency of communication, a maximum number of retries for using the mediation device, or the like.
摘要翻译： 通信接入协议提高了在异步网络（100）上运行的设备的可访问性，同时支持降低功耗。 网络（100）包括用于促进网络设备之间的通信的中介设备（130）。 通常，每个网络设备周期性地发送信标信号以通告其存在，并且侦听针对网络设备（532,534）的通信信号。 启动与另一个的通信的设备以至少两种操作模式中的一种操作，以建立通信（536,537,538）。 在一种模式中，发起设备与中介设备通信，以便导出另一设备的定时信息（537）。 在另一种模式中，发起设备监听从目标设备直接接收信标信号，以便同步与设备的通信（538）。 两种操作模式之一的选择取决于为启动设备建立的控制参数，在一个实施例中，该控制参数取决于通信的紧急性，使用中介设备的最大重试次数等。
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公开(公告)号：US06184751B2
公开(公告)日：2001-02-06
申请号：US09135441
申请日：1998-08-17
IPC分类号： H03G318
摘要： An amplifier circuit (20) uses a series transistor (38) to couple the output of an amplifier (26) to a tuned circuit load (40) and to act as a variable resistance. In one embodiment for a multi-band receiver, multiple series transistors (38, 42) are switched for connecting different tuned circuits (40, 44) to the amplifier's output, and an activated one of the series transistors receives a gate voltage that varies its resistance so as to achieve gain control. An activated series transistors can also provide a resistance that stabilizes the amplifier (26).
摘要翻译： 放大器电路（20）使用串联晶体管（38）将放大器（26）的输出耦合到调谐电路负载（40）并用作可变电阻。 在多频带接收机的一个实施例中，多个串联晶体管（38,42）被切换以将不同的调谐电路（40,44）连接到放大器的输出，并且串联晶体管中激活的一个接收栅极电压， 电阻以实现增益控制。 激活的串联晶体管还可以提供稳定放大器（26）的电阻。
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公开(公告)号：US6160490A
公开(公告)日：2000-12-12
申请号：US17564
申请日：1998-02-02
CPC分类号： H02J7/0031 , G05F1/575 , H02J2007/004 , H04W52/0277 , Y02D70/00
摘要： A selective call receiver (100) operating from a battery (102), includes a battery monitor (114), a radio receiver (108), a regulator (104), a capacitor (105) coupled to the regulator and the radio receiver, and a processor (116) for controlling the foregoing elements. The processor is adapted to determine from the battery monitor an energy level of the battery, configure the regulator to supply a first limited current to the radio receiver and the capacitor for a first predetermined time when the energy level is above a predetermined threshold, or configure the regulator to supply a second limited current to the radio receiver and the capacitor for a second predetermined time when the energy level is at or below the predetermined threshold. After configuring the regulator, the processor is then adapted to enable the regulator to charge the capacitor and to power the radio receiver.
摘要翻译： 从电池（102）操作的选呼接收机（100）包括电池监视器（114），无线电接收器（108），调节器（104），耦合到调节器的电容器（105）和无线电接收器， 以及用于控制上述要素的处理器（116）。 处理器适于从电池监视器确定电池的能量水平，配置稳压器以在能级高于预定阈值时的第一预定时间向无线电接收器和电容器提供第一有限电流，或配置 所述调节器在所述能级处于或低于所述预定阈值时，向所述无线电接收器和所述电容器提供第二限制电流达到第二预定时间。 在配置调节器之后，处理器然后适于使调节器对电容器充电并为无线电接收器供电。
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8.发明授权Communication device and method for reducing effects of noise introduction by synchronizing data transfer to a received signal 失效用于通过将数据传送同步到接收信号来减少噪声引入的影响的通信装置和方法
公开(公告)号：US5838741A
公开(公告)日：1998-11-17
申请号：US797324
申请日：1997-02-10
申请人： Edgar Herbert Callaway, Jr. , Zakir Hussain Ansari , Von Alan Mock , Eric Thomas Eaton , David Jeffrey Hayes
发明人： Edgar Herbert Callaway, Jr. , Zakir Hussain Ansari , Von Alan Mock , Eric Thomas Eaton , David Jeffrey Hayes
CPC分类号： H03K5/1252 , H04B1/10 , H04L1/0001
摘要： A communication device (100) having a receiver circuit (110), signal processor circuit (120), controller circuit (130), either embodied by integrated circuits or on a single integrated circuit. The transfer of signals between the circuits is timed so as to minimize the effects of noise introduced into any one of the circuits, particularly the receiver circuit (110). The center of a symbol of a received RF symbol is detected and, through hardware control or software control, the transfer of a data signal generated by the signal processor circuit (120), for example, is permitted to occur only during a period(s) of time determined to have minimal effects on the sampling of a symbol in a received signal by the receiver circuit (110).
摘要翻译： 具有接收机电路（110），信号处理器电路（120），控制器电路（130）或通过集成电路实现或在单个集成电路上实现的通信设备（100）。 电路之间的信号传输被定时，以便最小化引入任何一个电路，特别是接收机电路（110）的噪声的影响。 检测到接收的RF符号的符号的中心，并且通过硬件控制或软件控制，例如允许由信号处理器电路（120）产生的数据信号的传送仅在一段时间（s ）被确定为对由接收器电路（110）接收的信号中的符号的采样具有最小的影响。
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9.发明授权Quality of service (QOS) control mechanisms using mediation devices in an asynchronous network 有权使用异步网络中的中介设备的服务质量（QOS）控制机制公开(公告)号：US07440462B2
公开(公告)日：2008-10-21
申请号：US10443424
申请日：2003-05-22
IPC分类号： H04L12/28
CPC分类号： H04L1/06 , H04L25/0202
摘要： Mediation devices in an asynchronous network of low power consumption communication devices are leveraged through the use of new protocols (2500) that analyze relevant QoS parameters (2520) in order to provide a better than best effort service in the network. These protocols invoke adaptive quality of service (QoS) mechanisms to capitalize on the strength and flexibility provided to the network by the presence of one or more MDs, as described above. Expanded functionality of the MD includes control information messaging and service differentiation for the purpose of improving QoS of the network.
摘要翻译： 通过使用分析相关QoS参数（2520）的新协议（2500）来利用低功耗通信设备的异步网络中的中介设备，以便提供比网络中的更好的服务。 如上所述，这些协议调用自适应服务质量（QoS）机制以利用由一个或多个MD的存在而提供给网络的强度和灵活性。 MD的扩展功能包括控制信息消息传递和服务差异化，以提高网络的QoS。
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10.发明授权公开(公告)号：US06370365B1
公开(公告)日：2002-04-09
申请号：US09205312
申请日：1998-12-04
IPC分类号： H04B104
摘要： A selective call radio (300) includes receiver (200). The receiver in turn includes an antenna (202) for receiving a radio signal having a first operating frequency, an amplifier(204) coupled thereto for generating an amplified signal; and a frequency translation circuit (208). The frequency translation circuit includes a selectivity filter (212) and an integrated frequency conversion circuit (216). The selectivity is coupled to the amplified signal for generating a filtered signal. The integrated frequency conversion circuit is coupled to the filtered signal and is incorporated into at least one IC (integrated circuit). The integrated frequency conversion circuit includes an oscillator (220), a divider (224), and a mixer (218). A first input of the mixer is coupled to the filtered signal generated by the selectivity filter. The divider is coupled to the oscillator and its output is coupled to a second input of the mixer. The mixer generates an output signal having a second operating frequency, the second operating frequency having a frequency value different from the frequency value of the first operating frequency of the radio signal.
摘要翻译： 选呼通话（300）包括接收机（200）。 接收机又包括用于接收具有第一工作频率的无线电信号的天线（202），与其耦合的放大器（204），用于产生放大信号; 和频率转换电路（208）。 频率转换电路包括选择性滤波器（212）和集成频率转换电路（216）。 选择性耦合到放大的信号以产生滤波信号。 集成频率转换电路耦合到滤波后的信号，并被并入到至少一个IC（集成电路）中。 集成频率转换电路包括振荡器（220），分频器（224）和混频器（218）。 混频器的第一输入端耦合到由选择滤波器产生的滤波信号。 分频器耦合到振荡器，其输出耦合到混频器的第二输入端。 混频器产生具有第二工作频率的输出信号，第二工作频率具有与无线电信号的第一工作频率的频率值不同的频率值。
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