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1. 发明授权

US08995569B2 Quadrature digital-IF transmitter without inter-stage SAW filter and devices using same 有权
标题翻译：具有阶跃式SAW滤波器的正交数字中频发射机和使用其的器件
公开(公告)号：US08995569B2
公开(公告)日：2015-03-31
申请号：US13341495
申请日：2011-12-30
申请人： Lup Meng Loh , Imtinan Elahi , Naveen Yanduru , Michael L. Brobston
发明人： Lup Meng Loh , Imtinan Elahi , Naveen Yanduru , Michael L. Brobston
IPC分类号： H04L25/49 , H04L25/03 , H04L27/20 , H04L27/00
CPC分类号： H04L25/03343 , H04L27/20 , H04L2027/0018
摘要： An RF transmitter comprises a digital-to-IF circuit block configured to receive a digital in-phase baseband signal and a digital quadrature baseband signal and to up-convert the digital in-phase and quadrature baseband signals to a digital in-phase IF signal and to a digital quadrature IF signal. The wireless RF transmitter further comprises an IF-to-RF circuit block configured to convert the digital in-phase and quadrature IF signals to analog signals and to up-convert the analog in-phase and quadrature IF signals to an RF output signal. The digital-to-IF circuit block comprises pre-compensation circuitry configured to reduce analog impairments associated with the IF-to-RF circuit block.
摘要翻译： RF发射机包括被配置为接收数字同相基带信号和数字正交基带信号的数/中频电路块，并且将数字同相和正交基带信号上变频到数字同相IF信号和数字正交IF信号。无线RF发射机还包括被配置为将数字同相和正交IF信号转换为模拟信号并将模拟同相和正交IF信号上变频为RF输出信号的IF至RF电路块。数字到中频电路块包括被配置为减少与IF到RF电路块相关联的模拟损伤的预补偿电路。

2. 发明授权

US07391256B2 System and method for DC correction in wireless receivers 失效
标题翻译：无线接收机直流校正系统及方法
公开(公告)号：US07391256B2
公开(公告)日：2008-06-24
申请号：US11522752
申请日：2006-09-18
申请人： William Milton Hurley , Lup Meng Loh , Yinong Ding , Michael L. Brobston , John Alexander Interrante
发明人： William Milton Hurley , Lup Meng Loh , Yinong Ding , Michael L. Brobston , John Alexander Interrante
IPC分类号： H03F1/02
CPC分类号： H03F3/191
摘要： The present disclosure relates generally to systems and methods for direct current (DC) correction in wireless devices. In one example, a method includes setting a cutoff frequency of a filter at a first frequency, where a signal entering the filter is attenuated based on the cutoff frequency. If a qualified change is detected in a DC component of the signal, the cutoff frequency is set at a second frequency that attenuates more of the signal than the first frequency for a defined time period. The cutoff frequency may then be set to the first frequency after the defined time period.
摘要翻译：本公开一般涉及无线设备中直流（DC）校正的系统和方法。在一个示例中，一种方法包括：以第一频率设置滤波器的截止频率，其中进入滤波器的信号基于截止频率衰减。如果在信号的直流分量中检测到合格的变化，则将截止频率设定在第二频率，该频率在规定的时间段内衰减比第一频率更多的信号。然后可以在限定的时间段之后将截止频率设置为第一频率。

3. 发明授权

US07369873B2 Apparatus and method for remotely modifying reconfigurable hardware in a mobile station 失效
标题翻译：用于在移动台中远程修改可重配置硬件的装置和方法
公开(公告)号：US07369873B2
公开(公告)日：2008-05-06
申请号：US11055030
申请日：2005-02-10
申请人： Michael L. Brobston , Weon-Ki Yoon , William M. Hurley
发明人： Michael L. Brobston , Weon-Ki Yoon , William M. Hurley
IPC分类号： H04Q7/20 , H04Q7/32
CPC分类号： H04B1/0028 , H04W88/06
摘要： A multi-mode mobile station comprising 1) reconfigurable transceiver circuitry for communicating with wireless networks operating under different air interface standards; 2) a memory for storing at least a download configuration file and a home configuration file; and 3) a main controller for configuring the reconfigurable transceiver circuitry to operate according to a home network wireless standard using home configuration data retrieved from the home configuration file. If the main controller determines that a network operating according to the home network wireless standard cannot be found, the main controller is further capable of configuring the reconfigurable transceiver circuitry to operate according to a download channel wireless standard using download configuration data retrieved from the download configuration file. The main controller then establishes a download channel with a local roaming wireless network and downloads a roaming network configuration file from the roaming wireless network over the download channel.
摘要翻译：一种多模移动台，包括：1）可重配置收发器电路，用于与在不同空中接口标准下工作的无线网络进行通信; 2）用于至少存储下载配置文件和归属配置文件的存储器; 以及3）主控制器，用于根据从家庭配置文件检索的家庭配置数据，配置可重新配置的收发器电路以根据家庭网络无线标准进行操作。如果主控制器确定不能找到根据家庭网络无线标准操作的网络，则主控制器还能够使用从下载配置检索的下载配置数据，根据下载频道无线标准来配置可重新配置的收发器电路进行操作文件。然后，主控制器建立与本地漫游无线网络的下载频道，并通过下载频道从漫游无线网络下载漫游网络配置文件。

4. 发明授权

US06304762B1 Point to multipoint communication system with subsectored upstream antennas 失效
标题翻译：具有次上行天线的点对多点通信系统
公开(公告)号：US06304762B1
公开(公告)日：2001-10-16
申请号：US08996258
申请日：1997-12-22
申请人： William K. Myers , Eugene A. Robinson , Hatcher E. Chalkley , Michael L. Brobston , Douglas B. Weiner
发明人： William K. Myers , Eugene A. Robinson , Hatcher E. Chalkley , Michael L. Brobston , Douglas B. Weiner
IPC分类号： H04B138
CPC分类号： H04W88/08 , H04W16/24 , H04W84/14
摘要： A point-to-multipoint communication system wherein the base station broadcasts the same frequency band signals over multiple sectors of given node. The base station includes a plurality of channel receivers (ch. 1-ch. n) for each sector and a plurality of antennas 36a and 36b selectively coupled to said channel receivers. The subsector antennas have these radiation centers offset from each other to present different coverage over the node.
摘要翻译：一种点对多点通信系统，其中基站在给定节点的多个扇区上广播相同的频带信号。基站包括用于每个扇区的多个信道接收机（ch.1-ch.n）和选择性地耦合到所述信道接收机的多个天线36a和36b。这些子天线具有这些辐射中心彼此偏移以呈现节点上的不同覆盖。

5. 发明申请

US20120200352A1 APPARATUS AND METHOD FOR AN INTEGRATED MULTI-MODE MULTI-BAND POWER AMPLIFIER 审中-公开
标题翻译：集成多模多功率放大器的装置和方法
公开(公告)号：US20120200352A1
公开(公告)日：2012-08-09
申请号：US13448200
申请日：2012-04-16
申请人： Xu Zhu , Michael L. Brobston , Lup M. Loh
发明人： Xu Zhu , Michael L. Brobston , Lup M. Loh
IPC分类号： H03F1/56 , H03F1/34
CPC分类号： H03F3/24 , H03F1/56 , H03F3/195 , H03F3/72 , H03F2200/111 , H03F2200/318 , H03F2203/7209 , H03F2203/7233
摘要： An apparatus and method for amplifying a transmission signals in multiple modes and multiple bands. The apparatus includes a tunable power amplifying module adapted to receive a plurality of signal types comprising multiple modes and multiple bands. The tunable power amplifying module includes a first and second power amplifier stages and a number of tunable matching networks configured to optimize an impedance value based on the mode and band of the signal to be amplified.
摘要翻译：一种用于放大多个模式和多个频带的传输信号的装置和方法。该装置包括适于接收包括多个模式和多个频带的多个信号类型的可调谐功率放大模块。可调谐功率放大模块包括第一和第二功率放大器级和多个可调匹配网络，其被配置为基于要放大的信号的模式和频带来优化阻抗值。

6. 发明申请

US20110274017A1 VERSATILE SYSTEM FOR TRANSCEIVER NOISE REDUCTION IN A TIME-DIVISION DUPLEXING WIRELESS NETWORK 审中-公开
标题翻译：时分双工无线网络中收发器噪声减少的复杂系统
公开(公告)号：US20110274017A1
公开(公告)日：2011-11-10
申请号：US13188634
申请日：2011-07-22
申请人： Michael L. Brobston , Breck W. Lovinggood , Robert W. Monroe
发明人： Michael L. Brobston , Breck W. Lovinggood , Robert W. Monroe
IPC分类号： H04B3/20
CPC分类号： H04B1/0475 , H03H7/25 , H04B1/525
摘要： A system for suppressing transmission channel noise in a signal transmission/reception device—particularly a time division duplex (TDD) wireless communications device—is provided. The system provides one or more shunt elements, instantiated at some point along the device's signal transmission channel. One or more attenuation elements are also instantiated at some point along the signal transmission channel, as are one or more disabling elements. A trigger signal indicates when the device is shifting from signal transmission operation (or mode) to signal reception operation. Responsive to assertion of the trigger signal, the shunt, attenuation and disabling elements are activated.
摘要翻译：提供一种用于抑制信号发送/接收装置（特别是时分双工（TDD）无线通信装置）中的传输信道噪声的系统。该系统提供一个或多个分流元件，在设备的信号传输通道的某个点处实例化。一个或多个衰减元件也在信号传输通道的某个点被实例化，以及一个或多个禁用元件。触发信号指示装置何时从信号传输操作（或模式）转换到信号接收操作。响应于触发信号的断言，分流，衰减和禁用元件被激活。

7. 发明授权

US07340228B2 Apparatus and method for high efficiency RF power amplification using drain bias adaptation 失效
标题翻译：使用漏极偏置适应的高效RF功率放大的装置和方法
公开(公告)号：US07340228B2
公开(公告)日：2008-03-04
申请号：US11177032
申请日：2005-07-08
申请人： Robert W. Monroe , Michael L. Brobston
发明人： Robert W. Monroe , Michael L. Brobston
IPC分类号： H04B1/04
CPC分类号： H03F1/0266 , H03F1/02 , H03F1/0244 , H03F3/189 , H03F3/24 , H03F3/245 , H03F2200/102 , H03F2200/15 , H03F2200/27 , H03F2200/336 , H04B2001/045
摘要： An RF transmitter having an RF power amplifier comprising: 1) a drive transistor that receives an input RF signal and generates an output RF signal; and 2) a drain bias adaptation circuit for supplying drain current to the drive transistor. The drain bias adaptation circuit comprises: i) a first switch for coupling the drive transistor drain to a system supply voltage; ii) a second switch for coupling the drive transistor drain to a high supply voltage that is greater than the system supply voltage; iii) a first bypass capacitor coupled to the first switch for reducing noise in the drain current when the first switch is closed and the second switch is open; and iv) a second bypass capacitor coupled to the second switch for reducing noise in the drain current when the second switch is closed and the first switch is open.
摘要翻译：一种具有RF功率放大器的RF发射器，包括：1）驱动晶体管，其接收输入RF信号并产生输出RF信号; 和2）用于向驱动晶体管提供漏极电流的漏极偏置适配电路。漏极偏置适配电路包括：i）用于将驱动晶体管漏极耦合到系统电源电压的第一开关; ii）用于将驱动晶体管漏极耦合到大于系统电源电压的高电源电压的第二开关; iii）耦合到所述第一开关的第一旁路电容器，用于当所述第一开关闭合并且所述第二开关断开时降低所述漏极电流中的噪声; 以及iv）耦合到所述第二开关的第二旁路电容器，用于当所述第二开关闭合并且所述第一开关断开时降低所述漏极电流中的噪声。

8. 发明授权

US08712348B2 Apparatus and method for controlling a tunable matching network in a wireless network 有权
标题翻译：用于控制无线网络中可调谐匹配网络的装置和方法
公开(公告)号：US08712348B2
公开(公告)日：2014-04-29
申请号：US13214892
申请日：2011-08-22
申请人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
发明人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
IPC分类号： H04B1/04 , H03H7/40
CPC分类号： H04B1/0458 , H03H7/40
摘要： An apparatus and method manage impedance values in a radio in a wireless network. The apparatus includes a tunable matching network (TMN) positioned on a path between a transceiver and an antenna. The TMN includes a plurality of immittance elements. A voltage standing wave ratio (VSWR) detector is configured to detect a ratio of a signal passing the VSWR detector and a signal reflected from the TMN. A control circuit is configured to identify an operating setting for the radio, set a number of the immittance elements based on the operating setting, monitor the ratio detected by the VSWR detector, and modify a setting of at least one of the immittance elements based on the ratio detected.
摘要翻译：无线网络中的无线电装置和方法管理阻抗值。该装置包括位于收发器和天线之间的路径上的可调匹配网络（TMN）。 TMN包括多个导纳元件。电压驻波比（VSWR）检测器被配置为检测通过VSWR检测器的信号和从TMN反射的信号的比率。控制电路被配置为识别无线电的操作设置，基于操作设置设置多个导纳元素，监视由VSWR检测器检测的比率，并且基于以下方式修改至少一个导纳元素的设置：检测比例。

9. 发明申请

US20120051409A1 APPARATUS AND METHOD FOR CONTROLLING A TUNABLE MATCHING NETWORK IN A WIRELESS NETWORK 有权
标题翻译：在无线网络中控制可调匹配网络的装置和方法
公开(公告)号：US20120051409A1
公开(公告)日：2012-03-01
申请号：US13214892
申请日：2011-08-22
申请人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
发明人： Michael L. Brobston , Xu Zhu , Au Duy Bui , George Z. Hutcheson
IPC分类号： H03H7/38 , H04B1/38
CPC分类号： H04B1/0458 , H03H7/40
摘要： An apparatus and method manage impedance values in a radio in a wireless network. The apparatus includes a tunable matching network (TMN) positioned on a path between a transceiver and an antenna. The TMN includes a plurality of immittance elements. A voltage standing wave ratio (VSWR) detector is configured to detect a ratio of a signal passing the VSWR detector and a signal reflected from the TMN. A control circuit is configured to identify an operating setting for the radio, set a number of the immittance elements based on the operating setting, monitor the ratio detected by the VSWR detector, and modify a setting of at least one of the immittance elements based on the ratio detected.
摘要翻译：无线网络中的无线电装置和方法管理阻抗值。该装置包括位于收发器和天线之间的路径上的可调匹配网络（TMN）。 TMN包括多个导纳元件。电压驻波比（VSWR）检测器被配置为检测通过VSWR检测器的信号和从TMN反射的信号的比率。控制电路被配置为识别无线电的操作设置，基于操作设置设置多个导纳元素，监视由VSWR检测器检测的比率，并且基于以下方式修改至少一个导纳元素的设置：检测比例。

10. 发明授权

US07558550B2 Versatile system for multimode, wireless communication receiver with ZIF and Near-ZIF operations 失效
标题翻译：具有ZIF和Near-ZIF操作功能的多模，无线通信接收机的通用系统
公开(公告)号：US07558550B2
公开(公告)日：2009-07-07
申请号：US11326124
申请日：2006-01-05
申请人： Michael L. Brobston , Steven Loh , Seong Eun Kim , Weon Ki Yoon
发明人： Michael L. Brobston , Steven Loh , Seong Eun Kim , Weon Ki Yoon
IPC分类号： H04B1/16
CPC分类号： H04B1/30
摘要： An architecture for a receiver component in a wireless communications system is disclosed—one that supports both zero intermediate frequency (ZIF) and near-zero intermediate frequency (NZIF) operation. The architecture provides a down-conversion segment, and a local oscillator segment operatively associated with the down-conversion segment. An analog-to-digital conversion (ADC) segment is adapted to receive signals from the down-conversion segment and introduce the signals into a digital intermediate frequency (DIF) construct. The DIF construct performs a DC offset compensation or DC residue filtering on NZIF-based signals, and droop or mismatch compensation. Image removal is performed on NZIF-based signals, and DC offset compensation is performed on ZIF-based signals. Compensated signals are amplified to some nominal or desired level, and interpolation filtering of the amplified signals is performed prior to transmission thereof.
摘要翻译：公开了一种用于无线通信系统中的接收机组件的架构，其支持零中频（ZIF）和近零中频（NZIF）操作。该架构提供了一个下转换段，以及与下转换段可操作地相关联的本地振荡器段。模数转换（ADC）段适于从下转换段接收信号并将信号引入数字中频（DIF）构造。 DIF结构对基于NZIF的信号执行直流偏移补偿或直流残差滤波，以及下降或失配补偿。在基于NZIF的信号上执行图像去除，并且对基于ZIF的信号执行直流偏移补偿。补偿信号被放大到某个标称或期望电平，并且在发送之前执行放大信号的内插滤波。

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