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. 发明授权

US08331898B2 Power-saving receiver circuits, systems and processes 有权
标题翻译：省电接收器电路，系统和过程
公开(公告)号：US08331898B2
公开(公告)日：2012-12-11
申请号：US12244060
申请日：2008-10-02
申请人： Deric Wayne Waters , Karthik Ramasubramanian , Arun Raghupathy
发明人： Deric Wayne Waters , Karthik Ramasubramanian , Arun Raghupathy
IPC分类号： H04B1/16
CPC分类号： H04B1/1615 , G01S19/34
摘要： An electronic circuit includes a receiver circuit (BSP) operable to perform coherent summations having a coherent summations time interval, and a power control circuit (2130) coupled to said receiver circuit (BSP) and operable to impress a power controlling duty cycle (TON, TOFF) on the receiver circuit (BSP) inside the coherent summations time interval. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.
摘要翻译：电子电路包括可操作以执行具有相干求和时间间隔的相干相加的接收器电路（BSP）和耦合到所述接收器电路（BSP）的功率控制电路（2130），并且可操作以将功率控制占空比（TON， TOFF）在相干求和时间间隔内的接收机电路（BSP）上。还公开了其它电路，装置，系统，操作方法和制造方法。

2. 发明申请

US20080039042A1 TECHNIQUES FOR CONTROLLING OPERATION OF CONTROL LOOPS IN A RECEIVER 有权
标题翻译：用于控制接收器中控制杆操作的技术
公开(公告)号：US20080039042A1
公开(公告)日：2008-02-14
申请号：US11560802
申请日：2006-11-16
申请人： Steven Ciccarelli , Brian Banister , Brian George , Soon-Seng Lau , Prasad Gudem , Arun Raghupathy
发明人： Steven Ciccarelli , Brian Banister , Brian George , Soon-Seng Lau , Prasad Gudem , Arun Raghupathy
IPC分类号： H04B7/00
CPC分类号： H04B1/109
摘要： Techniques for controlling operation of control loops in a receiver are described. The operation of at least one control loop is modified in conjunction with a change in operating state, which may correspond to a change in linearity state, gain state, operating frequency, antenna configuration, etc. A change in linearity state may occur when jammers are detected and may cause bias current of analog circuit blocks to be adjusted. The at least one control loop to be modified may include a DC loop, an AGC loop, etc. The operation of a control loop may be modified by disabling the control loop or changing its time constant prior to changing operating state, waiting a predetermined amount of time to allow the receiver to settle, and enabling the control loop or restoring its time constant after waiting the predetermined amount of time.
摘要翻译：描述了用于控制接收机中的控制环路的操作的技术。结合操作状态的改变来修改至少一个控制回路的操作，其可以对应于线性状态，增益状态，操作频率，天线配置等的改变。线性状态的变化可能发生在干扰器并且可能导致模拟电路块的偏置电流被调整。要修改的至少一个控制环路可以包括DC环路，AGC环路等。可以通过在改变操作状态之前禁用控制环路或改变其时间常数来修改控制环路的操作，等待预定量的时间以允许接收机安定，并且在等待预定时间量之后启用控制环路或恢复其时间常数。

3. 发明申请

US20050156662A1 Amplifier predistortion and autocalibration method and apparatus 有权
标题翻译：放大器预失真和自动校准方法和装置
公开(公告)号：US20050156662A1
公开(公告)日：2005-07-21
申请号：US10987360
申请日：2004-11-12
申请人： Arun Raghupathy , Puay See , Gurkanwal Sahota , Robert Reeves , Paul Peterzell
发明人： Arun Raghupathy , Puay See , Gurkanwal Sahota , Robert Reeves , Paul Peterzell
IPC分类号： H03F1/02 , H03F1/32 , H03G3/30 , H03F1/26
CPC分类号： H03F1/3247 , H03F1/0222 , H03F1/3282 , H03F2201/3233 , H03G3/3047
摘要： Methods and apparatus for amplifier AM and PM predistortion and autocalibration. AM and PM amplifier distortion can be corrected using predistortion. The AM and PM distortion characteristics of the amplifier are determined using an autocalibration technique. The amplifier characteristics can be stored in distinct look up tables. Alternatively, the inverse of the amplifier characteristics can be stored in distinct look up tables. Signals that are to be amplified are characterized in polar format having a phase component with a normalized magnitude and a magnitude component. The phase component can be predistorted by applying the inverse of the PM distortion characteristics to the signal. Similarly, the magnitude component can be predistorted by applying the inverse of the AM distortion characteristics to the signal. The predistorted phase component can be amplified using the previously characterized amplifier. The predistorted magnitude component can be used to set the gain of the previously characterized amplifier.
摘要翻译：放大器AM和PM预失真和自动校准的方法和装置。 AM和PM放大器失真可以使用预失真校正。使用自动校准技术确定放大器的AM和PM失真特性。放大器特性可以存储在不同的查找表中。或者，放大器特性的倒数可以存储在不同的查找表中。要被放大的信号的特征在于具有归一化幅度和幅度分量的相位分量的极化格式。通过将PM失真特性的反相应用于信号，可以对相位分量进行预失真。类似地，幅度分量可以通过将AM失真特性的反相应用于信号来预失真。可以使用先前描述的放大器来放大预失真相位分量。预失真幅度分量可用于设置先前表征的放大器的增益。

4. 发明授权

US08643540B2 Wide area positioning system 有权
公开(公告)号：US08643540B2
公开(公告)日：2014-02-04
申请号：US13412508
申请日：2012-03-05
申请人： Ganesh Pattabiraman , Subramanian Meiyappan , Arun Raghupathy , Hari Sankar
发明人： Ganesh Pattabiraman , Subramanian Meiyappan , Arun Raghupathy , Hari Sankar
IPC分类号： G01S19/46
CPC分类号： H04B1/7087 , G01S1/08 , G01S5/10 , G01S19/11 , G01S19/24 , G01S19/42 , G01S19/46 , H04B1/709 , H04B7/2618 , H04B2201/7073 , H04W4/02 , H04W56/005 , H04W72/005 , H04W72/0446 , H04W72/048
摘要： Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.

5. 发明授权

US08626099B2 Direct conversion receiver architecture 有权
标题翻译：直接转换接收机架构
公开(公告)号：US08626099B2
公开(公告)日：2014-01-07
申请号：US11376502
申请日：2006-03-14
申请人： Tao Li , Christian Holenstein , Inyup Kang , Brett C. Walker , Paul E. Peterzell , Raghu Challa , Matthew L. Severson , Arun Raghupathy , Gilbert Christopher Sih
发明人： Tao Li , Christian Holenstein , Inyup Kang , Brett C. Walker , Paul E. Peterzell , Raghu Challa , Matthew L. Severson , Arun Raghupathy , Gilbert Christopher Sih
IPC分类号： H04B1/06
CPC分类号： H03G3/3078 , H03G3/3068 , H03G3/3089
摘要： A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.
摘要翻译：具有用于去除信号分量的DC偏移的DC环路的直接下变频接收机架构，提供一系列增益的数字可变增益放大器（DVGA），用于为DVGA和RF提供增益控制的自动增益控制（AGC）回路 /模拟电路和串行总线接口（SBI）单元，通过串行总线为RF /模拟电路提供控制。可以如本文所述有利地设计和定位DVGA。可以基于DC循环的操作模式来选择VGA循环的操作模式，因为这两个循环彼此相互作用。在采集模式下，DC环路工作的持续时间可以被选择为与采集模式中的DC环路带宽成反比。一些或全部RF /模拟电路的控制可以通过串行总线提供。

6. 发明授权

US08615212B2 Direct conversion receiver architecture 有权
公开(公告)号：US08615212B2
公开(公告)日：2013-12-24
申请号：US11862330
申请日：2007-09-27
申请人： Tao Li , Christian Holenstein , Inyup Kang , Brett C. Walker , Paul E. Peterzell , Raghu Challa , Matthew L. Severson , Arun Raghupathy , Gilbert Christopher Sih
发明人： Tao Li , Christian Holenstein , Inyup Kang , Brett C. Walker , Paul E. Peterzell , Raghu Challa , Matthew L. Severson , Arun Raghupathy , Gilbert Christopher Sih
IPC分类号： H04B7/00
CPC分类号： H03G3/3078 , H03G3/3068 , H03G3/3089
摘要： A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.

7. 发明申请

US20130169484A1 WIDE AREA POSITIONING SYSTEMS AND METHODS 有权
标题翻译：广域定位系统和方法
公开(公告)号：US20130169484A1
公开(公告)日：2013-07-04
申请号：US13535128
申请日：2012-06-27
申请人： Arun Raghupathy , Andrew Sendonaris , Norman F. Krasner
发明人： Arun Raghupathy , Andrew Sendonaris , Norman F. Krasner
IPC分类号： G01S5/02
CPC分类号： G01S5/0226 , G01S19/11 , G01S19/46 , H04W64/00
摘要： Devices, systems, and methods for sending positional information from transmitters/beacons are disclosed. In one implementation a transmitter generates a range block including a ranging signal and a hybrid block including positioning data, and sends the range block and hybrid block in predefined slots in a transmit frame. A receiver in a user device receives signals from a plurality of transmitters and generates position/location information using trilateration and measured altitude information in comparison with transmitter altitude information.
摘要翻译：公开了用于从发射机/信标发送位置信息的装置，系统和方法。在一个实现中，发射机生成包括测距信号的范围块和包括定位数据的混合块，并且将发射帧中的预定义时隙中的距离块和混合块发送。用户设备中的接收机从多个发射机接收信号，并且与发射机高度信息相比，使用三边测量和测量的高度信息来生成位置/位置信息。

8. 发明申请

US20130063301A1 Wide Area Positioning System 有权
标题翻译：广域定位系统
公开(公告)号：US20130063301A1
公开(公告)日：2013-03-14
申请号：US13412508
申请日：2012-03-05
申请人： Ganesh PATTABIRAMAN , Subramanian MEIYAPPAN , Arun RAGHUPATHY , Hari SANKAR
发明人： Ganesh PATTABIRAMAN , Subramanian MEIYAPPAN , Arun RAGHUPATHY , Hari SANKAR
IPC分类号： G01S19/46
CPC分类号： H04B1/7087 , G01S1/08 , G01S5/10 , G01S19/11 , G01S19/24 , G01S19/42 , G01S19/46 , H04B1/709 , H04B7/2618 , H04B2201/7073 , H04W4/02 , H04W56/005 , H04W72/005 , H04W72/0446 , H04W72/048
摘要： Systems and methods are described for determining position of a receiver. The positioning system comprises a transmitter network including transmitters that broadcast positioning signals. The positioning system comprises a remote receiver that acquires and tracks the positioning signals and/or satellite signals. The satellite signals are signals of a satellite-based positioning system. A first mode of the remote receiver uses terminal-based positioning in which the remote receiver computes a position using the positioning signals and/or the satellite signals. The positioning system comprises a server coupled to the remote receiver. A second operating mode of the remote receiver comprises network-based positioning in which the server computes a position of the remote receiver from the positioning signals and/or satellite signals, where the remote receiver receives and transfers to the server the positioning signals and/or satellite signals.
摘要翻译：描述了用于确定接收机的位置的系统和方法。定位系统包括发射机网络，其包括广播定位信号的发射机。该定位系统包括一个远程接收器，用于获取和跟踪定位信号和/或卫星信号。卫星信号是基于卫星的定位系统的信号。远程接收机的第一模式使用基于终端的定位，其中远程接收机使用定位信号和/或卫星信号来计算位置。定位系统包括耦合到远程接收器的服务器。远程接收机的第二操作模式包括基于网络的定位，其中服务器根据定位信号和/或卫星信号计算远程接收器的位置，其中远程接收器接收并向服务器传送定位信号和/或卫星信号。

9. 发明授权

US08243864B2 Noise reduction filtering in a wireless communication system 有权
标题翻译：无线通信系统中的降噪滤波
公开(公告)号：US08243864B2
公开(公告)日：2012-08-14
申请号：US10994012
申请日：2004-11-19
申请人： Steven Ciccarelli , Arun Raghupathy , Brian C. Banister
发明人： Steven Ciccarelli , Arun Raghupathy , Brian C. Banister
IPC分类号： H04B1/10
CPC分类号： H03H17/0009 , H03G3/3052 , H04B1/1036 , H04B1/707
摘要： A technique for noise reduction in a wireless communication system uses controllable bandwidth filters (120) to filter a received signal. In a typical implementation, the filters (120) are used at baseband frequencies. A measurement (RSSI) is indicative of the strength of the received signal. A control circuit (144) generates a control signal (146) to control the bandwidth of the filters (120). If the received signal strength is above a first threshold, a wider bandwidth may be used for the filters (120). If the received signal is below a second threshold, the control circuit (144) generates the control signal (146) to set the filters (120) to a more narrow bandwidth. The system (100) may also be used with digital filters (150, 152) following digitization by analog to digital converters (ADCs) (130, 132). The system (100) is particularly well-suited for operation with noise-shaped ADCs (130, 132), such as Delta-Sigma converters.
摘要翻译：用于无线通信系统中降噪的技术使用可控带宽滤波器（120）来对接收到的信号进行滤波。在典型的实现中，滤波器（120）用于基带频率。测量（RSSI）表示接收信号的强度。控制电路（144）产生控制信号（146）以控制滤波器（120）的带宽。如果接收信号强度高于第一阈值，则可以对滤波器（120）使用更宽的带宽。如果接收信号低于第二阈值，则控制电路（144）产生控制信号（146）以将滤波器（120）设置为更窄的带宽。在数模转换器（ADC）（130,132）之后，系统（100）也可以与数字滤波器（150,152）一起使用。系统（100）特别适用于具有噪声形状的ADC（130,132）（诸如Δ-Σ转换器）的操作。

10. 发明申请

US20120182180A1 WIDE AREA POSITIONING SYSTEM 有权
标题翻译：宽域定位系统
公开(公告)号：US20120182180A1
公开(公告)日：2012-07-19
申请号：US13296067
申请日：2011-11-14
申请人： Thomas WOLF , Arun RAGHUPATHY , Andrew SENDONARIS , Subramanian MEIYAPPAN , Ganesh PATTABIRAMAN , Haochen TANG , Varaprasad VAJJHALA , Rajendra SINGH
发明人： Thomas WOLF , Arun RAGHUPATHY , Andrew SENDONARIS , Subramanian MEIYAPPAN , Ganesh PATTABIRAMAN , Haochen TANG , Varaprasad VAJJHALA , Rajendra SINGH
IPC分类号： G01S19/46 , G06F19/00
CPC分类号： G01S19/06 , G01C5/06 , G01S5/021 , G01S5/14 , G01S5/145 , G01S19/10 , G01S19/46
摘要： Positioning systems and methods comprise a network of transmitters that broadcast positioning signals comprising ranging signals and positioning system information. A ranging signal comprises information used to measure a distance to a transmitter broadcasting the ranging signal. A reference sensor array comprising at least one reference sensor unit is positioned at a known location. A remote receiver includes an atmospheric sensor collecting atmospheric data at a position of the remote receiver. A positioning application is coupled to the remote receiver and generates a reference pressure estimate at the position of the remote receiver using the atmospheric and reference data from the reference sensor array. The positioning application computes the position of the remote receiver using the reference pressure estimate and information derived from at least one of the positioning signals and satellite signals that are signals of a satellite-based positioning system. The position includes an elevation.
摘要翻译：定位系统和方法包括广播包括测距信号和定位系统信息的定位信号的发射机网络。测距信号包括用于测量到广播测距信号的发射机的距离的信息。包括至少一个参考传感器单元的参考传感器阵列位于已知位置。远程接收器包括在远程接收器的位置处收集大气数据的大气传感器。定位应用耦合到远程接收器，并使用来自参考传感器阵列的大气和参考数据在远程接收器的位置处产生参考压力估计。定位应用使用参考压力估计和从作为基于卫星的定位系统的信号的定位信号和卫星信号中的至少一个导出的信息来计算远程接收机的位置。位置包括一个高程。

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