公开(公告)号：US08526898B2

公开(公告)日：2013-09-03

申请号：US12762900

申请日：2010-04-19

申请人： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

发明人： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC分类号： H04B1/16

CPC分类号： H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

摘要： A wideband receiver system is provided to concurrently receive multiple RF channels including a number of desired channels that are located in non-contiguous portions of a radio frequency spectrum and to group the number of desired channels into a contiguous frequency band. The system includes a wideband receiver having a complex mixer for down-shifting the multiple RF channels and transforming them to an in-phase signal and a quadrature signal in the baseband. The system further includes a wideband analog-to-digital converter module that digitizes the in-phase and quadrature signals and a digital frontend module that transforms the digital in-phase and quadrature signals to baseband signals that contains only the number of desired RF channels. that are now located in a contiguous frequency band. An up-converter module up-shifts the baseband signals to a contiguous band in an IF spectrum so that the system can directly interface with commercially available demodulators.

摘要翻译： 提供宽带接收机系统以同时接收多个RF信道，包括位于无线电频谱的非连续部分中的多个期望信道，并将期望信道的数目分组成连续的频带。 该系统包括具有复合混频器的宽带接收机，用于对多个RF信道进行下变频并将其变换成基带中的同相信号和正交信号。 该系统还包括将同相和正交信号数字化的宽带模数转换器模块和将数字同相和正交信号转换成仅包含所需RF信道数的基带信号的数字前端模块。 它们现在位于连续的频带中。 上变频器模块将基带信号升级到IF频谱中的连续频带，使系统可以直接与市售解调器接口。

公开(公告)号：US20110105068A1

公开(公告)日：2011-05-05

申请号：US12762900

申请日：2010-04-19

申请人： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

发明人： Madhukar Reddy ,  Curtis Ling ,  Tim Gallagher

IPC分类号： H04B1/16

CPC分类号： H04N21/4263 ,  H04B1/0014 ,  H04N5/455 ,  H04N5/50 ,  H04N21/4382 ,  H04N21/4383 ,  H04N21/454 ,  H04N21/6143 ,  H04N21/6193

摘要： A wideband receiver system is provided to concurrently receive multiple RF channels including a number of desired channels that are located in non-contiguous portions of a radio frequency spectrum and to group the number of desired channels into a contiguous frequency band. The system includes a wideband receiver having a complex mixer for down-shifting the multiple RF channels and transforming them to an in-phase signal and a quadrature signal in the baseband. The system further includes a wideband analog-to-digital converter module that digitizes the in-phase and quadrature signals and a digital frontend module that transforms the digital in-phase and quadrature signals to baseband signals that contains only the number of desired RF channels. that are now located in a contiguous frequency band. An up-converter module up-shifts the baseband signals to a contiguous band in an IF spectrum so that the system can directly interface with commercially available demodulators.

摘要翻译： 提供宽带接收机系统以同时接收多个RF信道，包括位于无线电频谱的非连续部分中的多个期望信道，并将期望信道的数目分组成连续的频带。 该系统包括具有复合混频器的宽带接收机，用于对多个RF信道进行下变频并将其变换成基带中的同相信号和正交信号。 该系统还包括将同相和正交信号数字化的宽带模数转换器模块和将数字同相和正交信号转换成仅包含所需RF信道数的基带信号的数字前端模块。 它们现在位于连续的频带中。 上变频器模块将基带信号升级到IF频谱中的连续频带，使系统可以直接与市售解调器接口。

公开(公告)号：US09991847B2

公开(公告)日：2018-06-05

申请号：US13336451

申请日：2011-12-23

申请人： Madhukar Reddy ,  Eric Fogleman ,  Curtis Ling

发明人： Madhukar Reddy ,  Eric Fogleman ,  Curtis Ling

IPC分类号： H03D7/16 ,  H04B1/10 ,  H04B15/04

CPC分类号： H03D7/165 ,  H03D2200/005 ,  H04B1/1027 ,  H04B15/04 ,  H04B2215/065 ,  H04B2215/068

摘要： A receiver may receive a signal and process each of a plurality of sub-bands of the received signal via a respective one of a plurality of first-type receive chains. The receiver may utilize a signal output by a first one of the plurality of the first-type receive chains to remove undesired signals from a signal output by a second one of the plurality of the first-type receive chains. The undesired signals may comprise aliases and/or harmonics of one or more signals that fall within a sub-band of the first one of the plurality of the first-type receive chains. The receiver may downconvert, filter, and digitize each of the plurality of sub-bands via a corresponding one of the plurality of the first type receive chains. The received signal may encompass the cable television band, and each of the plurality of sub-bands may comprise a plurality of cable television channels.

公开(公告)号：US09071470B2

公开(公告)日：2015-06-30

申请号：US12418489

申请日：2009-04-03

申请人： Madhukar Reddy ,  Curtis Ling

发明人： Madhukar Reddy ,  Curtis Ling

IPC分类号： H04L27/08 ,  H04L27/00

CPC分类号： H04L27/0002

摘要： A radio integrated circuit includes, in part, an analog front end block, an analog-to-digital converter responsive to the analog-front end block, a digital signal processor responsive to the analog-to-digital converter and adapted to generate in-phase and quadrature signals, and a serial communication interface configured to receive and transmit the in-phase and quadrature signals. The serial communication interface supplies a gain control signal to the analog front end block when a switch disposed in the radio integrated circuit is in a first position. When the switch is in a second position, a gain control block disposed in the radio integrated circuit receives a gain control signal from the analog-to-digital converter and supplies the gain control signal to the analog front end block. The digital signal processor may be configured to interleave the in-phase and quadrature signals.

摘要翻译： 无线电集成电路部分地包括模拟前端块，响应于模拟前端块的模数转换器，响应于模数转换器的数字信号处理器， 相位和正交信号，以及被配置为接收和发送同相和正交信号的串行通信接口。 当设置在无线电集成电路中的开关处于第一位置时，串行通信接口向模拟前端块提供增益控制信号。 当开关处于第二位置时，设置在无线电集成电路中的增益控制块从模数转换器接收增益控制信号，并将增益控制信号提供给模拟前端块。 数字信号处理器可以被配置为交织同相和正交信号。

公开(公告)号：US08577319B2

公开(公告)日：2013-11-05

申请号：US12249269

申请日：2008-10-10

申请人： Curtis Ling ,  Madhukar Reddy ,  John Wetherell

发明人： Curtis Ling ,  Madhukar Reddy ,  John Wetherell

IPC分类号： H04B1/06 ,  H04K3/00

CPC分类号： H03G3/20 ,  H03G3/3068 ,  H04B1/16 ,  H04B17/318

摘要： An automatic gain control loop disposed in a receiver is adapted to compensate for varying levels of out of band interference sources by adaptively controlling the gain distribution throughout the receive signal path. One or more intermediate received signal strength indicator (RSSI) detectors are used to determine a corresponding intermediate signal level. The output of each RSSI detector is coupled to an associated comparator that compares the intermediate RSSI value against a corresponding threshold. The take over point (TOP) for gain stages is adjusted based in part on the comparator output values. The TOP for each of a plurality of gain stages may be adjusted in discrete steps or continuously.

公开(公告)号：US20090252264A1

公开(公告)日：2009-10-08

申请号：US12418489

申请日：2009-04-03

申请人： Madhukar Reddy ,  Curtis Ling

发明人： Madhukar Reddy ,  Curtis Ling

IPC分类号： H04L27/08

CPC分类号： H04L27/0002

摘要： A radio integrated circuit includes, in part, an analog front end block, an analog-to-digital converter responsive to the analog-front end block, a digital signal processor responsive to the analog-to-digital converter and adapted to generate in-phase and quadrature signals, and a serial communication interface configured to receive and transmit the in-phase and quadrature signals. The serial communication interface supplies a gain control signal to the analog front end block when a switch disposed in the radio integrated circuit is in a first position. When the switch is in a second position, a gain control block disposed in the radio integrated circuit receives a gain control signal from the analog-to-digital converter and supplies the gain control signal to the analog front end block. The digital signal processor may be configured to interleave the in-phase and quadrature signals.

摘要翻译： 无线电集成电路部分地包括模拟前端块，响应于模拟前端块的模数转换器，响应于模数转换器的数字信号处理器， 相位和正交信号，以及被配置为接收和发送同相和正交信号的串行通信接口。 当设置在无线电集成电路中的开关处于第一位置时，串行通信接口向模拟前端块提供增益控制信号。 当开关处于第二位置时，设置在无线电集成电路中的增益控制块从模数转换器接收增益控制信号，并将增益控制信号提供给模拟前端块。 数字信号处理器可以被配置为交织同相和正交信号。

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：US20120163518A1

公开(公告)日：2012-06-28

申请号：US13336451

申请日：2011-12-23

申请人： Madhukar Reddy ,  Eric Fogleman ,  Curtis Ling

发明人： Madhukar Reddy ,  Eric Fogleman ,  Curtis Ling

IPC分类号： H03D1/04 ,  H04B1/10

CPC分类号： H03D7/165 ,  H03D2200/005 ,  H04B1/1027 ,  H04B15/04 ,  H04B2215/065 ,  H04B2215/068

摘要： A receiver may receive a signal and process each of a plurality of sub-bands of the received signal via a respective one of a plurality of first-type receive chains. The receiver may utilize a signal output by a first one of the plurality of the first-type receive chains to remove undesired signals from a signal output by a second one of the plurality of the first-type receive chains. The undesired signals may comprise aliases and/or harmonics of one or more signals that fall within a sub-band of the first one of the plurality of the first-type receive chains. The receiver may downconvert, filter, and digitize each of the plurality of sub-bands via a corresponding one of the plurality of the first type receive chains. The received signal may encompass the cable television band, and each of the plurality of sub-bands may comprise a plurality of cable television channels.

摘要翻译： 接收机可以经由多个第一类型接收链中的相应一个接收信号并处理接收信号的多个子带中的每个子带。 接收机可以利用由多个第一类型接收链中的第一个接收链的第一个输出的信号，以从由多个第一类型接收链中的第二类接收链输出的信号中去除不需要的信号。 不期望的信号可以包括落入多个第一类型接收链中的第一个的子带内的一个或多个信号的混叠和/或谐波。 接收机可以经由多个第一类型接收链中的对应的一个来对多个子带中的每一个进行下变频，滤波和数字化。 接收的信号可以包括有线电视频带，并且多个子频带中的每一个可以包括多个有线电视频道。

公开(公告)号：US20090258625A1

公开(公告)日：2009-10-15

申请号：US12249269

申请日：2008-10-10

申请人： Curtis Ling ,  Madhukar Reddy ,  John Wetherell

发明人： Curtis Ling ,  Madhukar Reddy ,  John Wetherell

IPC分类号： H04B7/00

CPC分类号： H03G3/20 ,  H03G3/3068 ,  H04B1/16 ,  H04B17/318

摘要： An automatic gain control loop disposed in a receiver is adapted to compensate for varying levels of out of band interference sources by adaptively controlling the gain distribution throughout the receive signal path. One or more intermediate received signal strength indicator (RSSI) detectors are used to determine a corresponding intermediate signal level. The output of each RSSI detector is coupled to an associated comparator that compares the intermediate RSSI value against a corresponding threshold. The take over point (TOP) for gain stages is adjusted based in part on the comparator output values. The TOP for each of a plurality of gain stages may be adjusted in discrete steps or continuously.

摘要翻译： 设置在接收机中的自动增益控制回路适于通过自适应地控制整个接收信号路径上的增益分布来补偿不同级别的带外干扰源。 一个或多个中间接收信号强度指示器（RSSI）检测器用于确定相应的中间信号电平。 每个RSSI检测器的输出耦合到相关联的比较器，其将中间RSSI值与相应的阈值进行比较。 增益级的接收点（TOP）部分基于比较器输出值进行调整。 可以以离散步骤或连续地调整多个增益级中的每一个的TOP。

公开(公告)号：US06542029B1

公开(公告)日：2003-04-01

申请号：US09686669

申请日：2000-10-11

申请人： Sabah Khesbak ,  Madhukar Reddy

发明人： Sabah Khesbak ,  Madhukar Reddy

IPC分类号： H03G320

CPC分类号： H03G3/3036

摘要： A system for varying output power of variable-gain amplifiers (VGA) allows for varying the output power transfer function, thus varying the gain, and, hence, the resolution of the output power of the VGA. The preferred embodiment comprises a variable-slope VGA (VSVGA) circuit configured to operate within a closed-loop power-controlled CDMA handset. The VSVGA circuit manipulates the input control voltage of the VGA, thereby, adjusting the gain of the amplifier by varying the slope of a line which models the amplifier output transfer function. Varying gain of the VGA provides for a varying resolution in the VGA amplifier output transfer function. This variation allows for compatibility of a single CDMA handset with different industry standards.

摘要翻译： 用于改变可变增益放大器（VGA）的输出功率的系统允许改变输出功率传递函数，从而改变增益，并因此改变VGA的输出功率的分辨率。 优选实施例包括可变斜率VGA（VSVGA）电路，其被配置为在闭环功率控制的CDMA手持机内操作。 VSVGA电路操纵VGA的输入控制电压，从而通过改变对放大器输出传递函数建模的线的斜率来调节放大器的增益。 VGA的不同增益提供了VGA放大器输出传递功能的不同分辨率。 这种变化允许单个CDMA手机与不同行业标准的兼容性。