公开(公告)号：US09882679B2

公开(公告)日：2018-01-30

申请号：US13933865

申请日：2013-07-02

申请人： Raja Pullela ,  Glenn Chang ,  Timothy Gallagher

发明人： Raja Pullela ,  Glenn Chang ,  Timothy Gallagher

IPC分类号： H04B1/10 ,  H04L1/00 ,  H04H40/90

CPC分类号： H04L1/0091 ,  H04H40/90

摘要： Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter. Crosstalk may be canceled in a receiver path from a cancellation filter receiving low-pass filtered down-converted signals from another path.

公开(公告)号：US08838057B2

公开(公告)日：2014-09-16

申请号：US13331792

申请日：2011-12-20

申请人： Raja Pullela ,  Vamsi Paidi ,  Rahul Bhatia

发明人： Raja Pullela ,  Vamsi Paidi ,  Rahul Bhatia

IPC分类号： H04B1/10 ,  H03D7/16 ,  H03D7/14

CPC分类号： H03D7/1466 ,  H03D7/166 ,  H03D2200/0086

摘要： A harmonic rejection mixer includes a first scaling circuit for scaling an RF signal to generate a plurality of scaled RF signals, a first switching stage for sampling the scaled RF signals using a first plurality of switching signals, and a second mixing stage for mixing the sampled RF signals with a second plurality of switching signals to generate a plurality of frequency translated signals having different phases. A combiner adds the frequency translated signals together to generate a first plurality of baseband versions of the RF signal. A first amplifier stage processes the first plurality of baseband versions to generate a second plurality of baseband versions. The mixer further includes a second scaling circuit for scaling the second plurality of baseband versions and a second amplifier stage to generate an in-phase baseband signal and a quadrature baseband signal from the scaled second plurality of baseband versions.

摘要翻译： 谐波抑制混频器包括用于缩放RF信号以产生多个缩放的RF信号的第一缩放电路，用于使用第一多个开关信号对缩放的RF信号进行采样的第一开关级，以及用于混合采样的第二混频阶段 具有第二多个开关信号的RF信号以产生具有不同相位的多个频率转换信号。 组合器将频率转换的信号加在一起以产生RF信号的第一多个基带版本。 第一放大器级处理第一多个基带版本以产生第二多个基带版本。 混频器还包括用于缩放第二多个基带版本的第二缩放电路和第二放大器级，以从缩放的第二多个基带版本生成同相基带信号和正交基带信号。

公开(公告)号：US10063266B2

公开(公告)日：2018-08-28

申请号：US13366803

申请日：2012-02-06

申请人： Raja Pullela ,  Sheng Ye ,  Morten Damgaard

发明人： Raja Pullela ,  Sheng Ye ,  Morten Damgaard

IPC分类号： H04B7/08 ,  H04B1/18

CPC分类号： H04B1/18

摘要： Methods and systems for a baseband cross-bar may comprise receiving one or more radio frequency (RF) signals in a wireless communication device via antennas coupled to a plurality of receiver paths in the wireless device. The received RF signals may be converted to baseband frequencies. One or more of the down-converted signals may be coupled to receiver paths utilizing a baseband cross-bar. The baseband cross-bar may comprise a plurality of switches, which may comprise CMOS transistors. In-phase and quadrature signals may be processed in the one or more of the plurality of receiver paths. The one or more RF signals comprise cellular signals and/or global navigation satellite signals. A single-ended received RF signal may be converted to a differential signal in one or more of the plurality of receiver paths. The baseband cross-bar may be controlled utilizing a reduced instruction set computing (RISC) processor.

公开(公告)号：US07512393B2

公开(公告)日：2009-03-31

申请号：US11250995

申请日：2005-10-14

申请人： Raja Pullela ,  Peihua Ye ,  Tirdad Sowlati

发明人： Raja Pullela ,  Peihua Ye ,  Tirdad Sowlati

IPC分类号： H04B1/26 ,  G06F3/033

CPC分类号： H03D7/18 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0047

摘要： A downconverter is provided. The downconverter includes a I mixer and a Q mixer. Each mixer includes a transconductance stage and a mixer core stage. The outputs of the transconductance stages of the mixers are shorted together, and a resistors are arranged in series with an input of the mixer core stages.

摘要翻译： 提供下变频器。 下变频器包括I混频器和Q混频器。 每个混合器包括跨导级和混频器核级。 混频器的跨导级的输出短路在一起，并且电阻器与混频器核心级的输入串联布置。

公开(公告)号：US20140003559A1

公开(公告)日：2014-01-02

申请号：US13933865

申请日：2013-07-02

申请人： Raja Pullela ,  Glenn Chang ,  Timothy Gallagher

发明人： Raja Pullela ,  Glenn Chang ,  Timothy Gallagher

IPC分类号： H04L1/00

CPC分类号： H04L1/0091 ,  H04H40/90

摘要： Methods and systems for improved cross polarization rejection and tolerating of coupling between satellite signals may comprise receiving radio frequency (RF) signals on a chip, where the RF signals comprising a desired signal and at least one crosstalk signal. The received RF signals may be down-converted to baseband frequencies, and the down-converted signals are converted to digital signals. Crosstalk may be determined by estimating complex coupling coefficients between the received RF signals utilizing a de-correlation algorithm across a frequency bandwidth comprising the desired and crosstalk signals. The down-converted signals may be low-pass filtered and summed with an output signal from a cancellation filter. The complex coupling coefficients may be determined utilizing the de-correlation algorithm on the summed signals, and may be used to configure the cancellation filter. Crosstalk may be canceled in a receiver path from a cancellation filter receiving low-pass filtered down-converted signals from another path.

摘要翻译： 用于改进交叉极化抑制和卫星信号之间耦合的容忍的方法和系统可以包括在芯片上接收射频（RF）信号，其中RF信号包括期望的信号和至少一个串扰信号。 所接收的RF信号可以被下变频到基带频率，并且下变频信号被转换成数字信号。 可以通过利用包括期望和串扰信号的频率带宽上的去相关算法来估计接收的RF信号之间的复耦合系数来确定串扰。 下变频信号可以被低通滤波，并与来自消除滤波器的输出信号相加。 复合耦合系数可以利用求和信号上的去相关算法来确定，并且可以用于配置消除滤波器。 从接收来自另一路径的低通滤波的下变频信号的消​​除滤波器的接收机路径中可能会消除串扰。

公开(公告)号：US20130203368A1

公开(公告)日：2013-08-08

申请号：US13366803

申请日：2012-02-06

申请人： Raja Pullela ,  Sheng Ye ,  Morten Damgaard

发明人： Raja Pullela ,  Sheng Ye ,  Morten Damgaard

IPC分类号： H04B1/16

CPC分类号： H04B1/18

摘要： Methods and systems for a baseband cross-bar may comprise receiving one or more radio frequency (RF) signals in a wireless communication device via antennas coupled to a plurality of receiver paths in the wireless device. The received RF signals may be converted to baseband frequencies. One or more of the down-converted signals may be coupled to receiver paths utilizing a baseband cross-bar. The baseband cross-bar may comprise a plurality of switches, which may comprise CMOS transistors. In-phase and quadrature signals may be processed in the one or more of the plurality of receiver paths. The one or more RF signals comprise cellular signals and/or global navigation satellite signals. A single-ended received RF signal may be converted to a differential signal in one or more of the plurality of receiver paths. The baseband cross-bar may be controlled utilizing a reduced instruction set computing (RISC) processor.

摘要翻译： 用于基带交叉条的方法和系统可以包括经由耦合到无线设备中的多个接收器路径的天线在无线通信设备中接收一个或多个射频（RF）信号。 所接收的RF信号可以被转换为基带频率。 一个或多个下变频信号可以利用基带交叉条耦合到接收机路径。 基带交叉杆可以包括多个开关，其可以包括CMOS晶体管。 可以在多个接收器路径中的一个或多个中处理同相和正交信号。 一个或多个RF信号包括蜂窝信号和/或全球导航卫星信号。 单端接收RF信号可以在多个接收机路径中的一个或多个中被转换成差分信号。 可以使用简化的指令集计算（RISC）处理器来控制基带交叉条。

公开(公告)号：US20110222633A1

公开(公告)日：2011-09-15

申请号：US12984921

申请日：2011-01-05

申请人： Raja Pullela ,  Yu Su ,  Wenjian Chen

发明人： Raja Pullela ,  Yu Su ,  Wenjian Chen

IPC分类号： H04L25/06

CPC分类号： H04L25/08 ,  H03D7/165 ,  H04B1/30

摘要： A circuit for down-converting an RF signal to a baseband signal includes a trans-admittance amplifier adapted to receive the RF signal and generate in response a pair of differential current signals. The circuit further includes a trans-impedance amplifier having at least four mixers and at least four linear amplifiers. The four mixers frequency down-convert the pair of differential current signals to generate four pairs of differential baseband current signals, wherein each pair of the differential baseband current signals has a different phase and is associated with each of the linear amplifiers. Additionally, the circuit includes a summing block that generates an in-phase signal using a first weighted sum of the four different baseband current signals and a quadrature signal using a second weighted sum of the four different baseband current signals. The circuit further includes an analog-to-digital converter for converting the in-phase and quadrature signals to respective digital representations.

摘要翻译： 用于将RF信号下变频为基带信号的电路包括适合于接收RF信号并且响应于一对差分电流信号而产生的反导纳放大器。 电路还包括具有至少四个混频器和至少四个线性放大器的跨阻抗放大器。 四个混频器对一对差分电流信号进行下变频以产生四对差分基带电流信号，其中每对差分基带电流信号具有不同的相位并且与每个线性放大器相关联。 此外，该电路包括一个求和块，其使用四个不同基带电流信号的第一加权和产生同相信号，并使用四个不同基带电流信号的第二加权和产生正交信号。 电路还包括用于将同相和正交信号转换为相应数字表示的模数转换器。

公开(公告)号：US20130230078A1

公开(公告)日：2013-09-05

申请号：US13783130

申请日：2013-03-01

申请人： Glenn Chang ,  Raja Pullela ,  Madhukar Reddy ,  Timothy Gallagher ,  Shanta Murthy Prem Swaroop ,  Curtis Ling

发明人： Glenn Chang ,  Raja Pullela ,  Madhukar Reddy ,  Timothy Gallagher ,  Shanta Murthy Prem Swaroop ,  Curtis Ling

IPC分类号： H04H40/90

CPC分类号： H04H40/90 ,  H04N21/6143

摘要： A direct broadcast satellite (DBS) reception assembly may comprise an integrated circuit that is configurable between or among a plurality of configurations based on content requested by client devices served by the DBS reception assembly. In a first configuration, multiple satellite frequency bands may be digitized by the integrated circuit as a single wideband signal. In a second configuration, the satellite frequency bands may be digitized by the integrated circuit as a plurality of separate narrowband signals. The integrated circuit may comprise a plurality of receive paths, each of the receive chains comprising a respective one of a plurality of low noise amplifiers and a plurality of analog-to-digital converters.

摘要翻译： 直接广播卫星（DBS）接收组件可以包括可以基于由DBS接收组件服务的客户端设备请求的内容在多个配置之间或之间配置的集成电路。 在第一配置中，多个卫星频带可以被集成电路数字化为单个宽带信号。 在第二配置中，卫星频带可以由集成电路数字化为多个单独的窄带信号。 集成电路可以包括多个接收路径，每个接收链包括多个低噪声放大器和多个模数转换器中的相应一个。

公开(公告)号：US08798216B2

公开(公告)日：2014-08-05

申请号：US12984921

申请日：2011-01-05

申请人： Raja Pullela ,  Yu Su ,  Wenjian Chen

发明人： Raja Pullela ,  Yu Su ,  Wenjian Chen

IPC分类号： H04B1/10

CPC分类号： H04L25/08 ,  H03D7/165 ,  H04B1/30

摘要： A circuit for down-converting an RF signal to a baseband signal includes a trans-admittance amplifier adapted to receive the RF signal and generate in response a pair of differential current signals. The circuit further includes a trans-impedance amplifier having at least four mixers and at least four linear amplifiers. The four mixers frequency down-convert the pair of differential current signals to generate four pairs of differential baseband current signals, wherein each pair of the differential baseband current signals has a different phase and is associated with each of the linear amplifiers. Additionally, the circuit includes a summing block that generates an in-phase signal using a first weighted sum of the four different baseband current signals and a quadrature signal using a second weighted sum of the four different baseband current signals. The circuit further includes an analog-to-digital converter for converting the in-phase and quadrature signals to respective digital representations.

摘要翻译： 用于将RF信号下变频为基带信号的电路包括适合于接收RF信号并且响应于一对差分电流信号而产生的反导纳放大器。 电路还包括具有至少四个混频器和至少四个线性放大器的跨阻抗放大器。 四个混频器对一对差分电流信号进行下变频以产生四对差分基带电流信号，其中每对差分基带电流信号具有不同的相位并且与每个线性放大器相关联。 此外，该电路包括一个求和块，其使用四个不同基带电流信号的第一加权和产生同相信号，并使用四个不同基带电流信号的第二加权和产生正交信号。 电路还包括用于将同相和正交信号转换为相应数字表示的模数转换器。

公开(公告)号：US20140015703A1

公开(公告)日：2014-01-16

申请号：US13939595

申请日：2013-07-11

申请人： Raja Pullela ,  Curtis Ling

发明人： Raja Pullela ,  Curtis Ling

IPC分类号： H03M1/50 ,  H03M1/12

CPC分类号： H03M1/50 ,  H03M1/12 ,  H03M1/1215 ,  H03M1/185 ,  H04B17/21 ,  H04B17/24

摘要： A system for processing signals may be configured to apply digital conversion to analog signals, and to apply, prior to the analog-to-digital conversion, a gain to at least a portion of the analog signals. The gain may be controlled and/or adjusted based on processing of digital output generated based on the analog-to-digital conversion. The system may comprise a plurality of sampling slices, which may be configured to provide the analog-to-digital conversion in interleaved (e.g., time-interleaved) manner. Each of the sampling slices may comprise a dedicated gain element, for applying gain to signals handled by the corresponding slice. The gain applied by the gain elements of the sampling slices may be controlled, independently, collectively, and/or in based on grouping into subsets. The gain may be controlled based on application of a particular gain control algorithm, which may be selected from a plurality of predefined algorithms.

摘要翻译： 用于处理信号的系统可以被配置为将数字转换应用于模拟信号，并且在模数转换之前将增益应用于至少一部分模拟信号。 可以基于基于模数转换产生的数字输出的处理来控制和/或调整增益。 该系统可以包括多个采样片，其可以被配置为以交织（例如，时间交织）的方式提供模数转换。 每个采样片可以包括专用增益元件，用于对由对应的片处理的信号施加增益。 由采样片的增益元件施加的增益可以独立地，集体地和/或基于对子集的分组进行控制。 可以基于可以从多个预定义算法中选择的特定增益控制算法的应用来控制增益。