公开(公告)号：US20120128045A1

公开(公告)日：2012-05-24

申请号：US13023478

申请日：2011-02-08

申请人： Curtis Ling ,  Timothy Gallagher

发明人： Curtis Ling ,  Timothy Gallagher

IPC分类号： H04B1/38

CPC分类号： H04L12/2863 ,  H04L12/12 ,  H04L12/2801 ,  H04L12/2861 ,  H04L12/2865 ,  H04L47/10 ,  H04L47/22 ,  H04L47/41 ,  Y02D50/30

摘要： Methods and apparatus for power control in a communications device are described. Bonding of channels in a modem may be dynamically adjusted responsive to user activity or demand for bandwidth. Bonded channel configurations may be adjusted to single channel configurations for low power operation. Modem configuration may be dynamically adjusted so as to maintain only required synchronization and system information to facilitate rapid data transfer resumption upon demand.

摘要翻译： 描述通信设备中功率控制的方法和装置。 响应于用户活动或对带宽的需求，可以动态地调整调制解调器中的信道的绑定。 绑定通道配置可以调整为单通道配置以实现低功耗操作。 可以动态调整调制解调器配置，以便仅维护所需的同步和系统信息，以便于在需要时快速恢复数据传输。

公开(公告)号：US20120087449A1

公开(公告)日：2012-04-12

申请号：US12979270

申请日：2010-12-27

申请人： CURTIS LING ,  TIMOTHY GALLAGHER

发明人： CURTIS LING ,  TIMOTHY GALLAGHER

IPC分类号： H04L25/08

CPC分类号： H04L27/2649 ,  H04L1/20 ,  H04L25/0204 ,  H04L27/2627 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2695 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0067 ,  H04L2027/0075

摘要： Methods and apparatus for processing multichannel signals in a multichannel receiver are described. In one implementation, a plurality of demodulator circuits may provide a plurality of outputs to a processing module, with the processing module then simultaneously estimating noise characteristics based on the plurality of outputs and generating a common noise estimate based on the plurality of outputs. This common noise estimate may then be provided back the demodulators and used to adjust the demodulation of signals in the plurality of demodulators to improve phase noise performance.

摘要翻译： 描述了在多通道接收机中处理多信道信号的方法和装置。 在一个实现中，多个解调器电路可以向处理模块提供多个输出，处理模块然后基于多个输出同时估计噪声特性，并且基于多个输出生成公共噪声估计。 然后，可以将这种公共噪声估计提供给解调器，并用于调整多个解调器中的信号的解调以改善相位噪声性能。

公开(公告)号：US20110227614A1

公开(公告)日：2011-09-22

申请号：US13025111

申请日：2011-02-10

申请人： Anand K. Anandakumar ,  Hyungjin Kim ,  Curtis Ling

发明人： Anand K. Anandakumar ,  Hyungjin Kim ,  Curtis Ling

IPC分类号： H03L7/08

CPC分类号： H03L1/026 ,  G01S19/235 ,  H03L1/022 ,  H03L7/1976

摘要： To determine the level of frequency drift of a crystal oscillator as a result of a change in the its temperature, the temperature of the crystal oscillator is sensed and used together with previously stored data that includes a multitude of drift values of the frequency of the crystal oscillator each associated with a temperature of the crystal oscillator. Optionally, upon initialization of a GPS receiver in which the crystal oscillator is disposed, an initial temperature of the crystal oscillator is measured and a PLL is set to an initial frequency in association with the initial temperature. When acquisition fails in a region, the ppm region is changed. The temperature of the crystal oscillator is periodically measured and compared with the initial temperature, and the acquisition process is reset if there is a significant change in temperature. The GPS processor enters the tracking phase when acquisition is successful.

摘要翻译： 为了确定晶体振荡器的温度变化导致的晶体振荡器的频率漂移，晶体振荡器的温度与先前存储的包含晶体频率漂移值的数据一起被检测并使用 每个振荡器都与晶体振荡器的温度相关联。 可选地，在其中设置晶体振荡器的GPS接收机初始化时，测量晶体振荡器的初始温度，并将PLL设置为与初始温度相关联的初始频率。 当区域中的采集失败时，ppm区域发生变化。 周期性地测量晶体振荡器的温度并将其与初始温度进行比较，如果温度有明显变化，则采集过程将被重置。 采集成功后，GPS处理器进入跟踪阶段。

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：US20100271558A1

公开(公告)日：2010-10-28

申请号：US12831225

申请日：2010-07-06

申请人： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

发明人： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

IPC分类号： H04N5/44 ,  H04B1/00

CPC分类号： H04B1/28 ,  H03D7/166

摘要： A receiver configured to selectively receive an RF signal from an operating band having a plurality of RF channels. The receiver is configured to upconvert the desired RF channel to an intermediate frequency (IF) greater than the RF channel frequencies. The upconverted RF channel is downconverted to baseband or a low IF. The receiver can perform channel selection by filtering the baseband or low IF signal. The baseband or low IF signal can be upconverted to a programmable output IF.

摘要翻译： 一种被配置为从具有多个RF信道的工作频带有选择地接收RF信号的接收机。 接收机被配置为将期望的RF信道上变频到大于RF信道频率的中频（IF）。 上变频的RF信道被下变频到基带或低IF。 接收机可以通过对基带或低IF信号进行滤波来执行信道选择。 基带或低IF信号可以上变频到可编程输出IF。

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：US20090040391A1

公开(公告)日：2009-02-12

申请号：US12184652

申请日：2008-08-01

申请人： Curtis Ling ,  Patrick Tierney ,  Ramakrishna Akella

发明人： Curtis Ling ,  Patrick Tierney ,  Ramakrishna Akella

IPC分类号： H04N5/50 ,  H04N5/455

CPC分类号： H04N5/50 ,  H04N5/4401 ,  H04N5/4446 ,  H04N5/455 ,  H04N21/4263 ,  H04N21/43632 ,  H04N21/4382 ,  H04N21/443

摘要： A tuner includes, in part, one or mixers, one or more filters, one or more variable gain stages, one or more analog to digital converters, and a baseband processor. Each filter is responsive to an associated mixer's output signal. Each variable gain stage is responsive to an associated filter's output. Each analog-to-digital converter is adapted to convert the output signal of an associated variable gain stage to a digital signal. The baseband processor is responsive to the digital signal supplied by the analog-to-digital converter(s). The baseband processor is further configured to supply a signal to be demodulated by a processing unit external to the integrated circuit. The baseband processor performs no or a fraction of the required demodulation functions. The processing unit may be a central processing unit or a graphical processing unit.

摘要翻译： 调谐器部分地包括一个或者混频器，一个或多个滤波器，一个或多个可变增益级，一个或多个模数转换器和基带处理器。 每个滤波器响应于相关混频器的输出信号。 每个可变增益级都响应相关过滤器的输出。 每个模拟 - 数字转换器适于将相关联的可变增益级的输出信号转换为数字信号。 基带处理器响应于由模数转换器提供的数字信号。 基带处理器还被配置为提供要由集成电路外部的处理单元解调的信号。 基带处理器执行所需解调功能的任何部分或一部分。 处理单元可以是中央处理单元或图形处理单元。

公开(公告)号：US20080209499A1

公开(公告)日：2008-08-28

申请号：US12036949

申请日：2008-02-25

申请人： Sridhar Ramesh ,  Curtis Ling ,  Ramakrishna Akella ,  Brenndon Lee

发明人： Sridhar Ramesh ,  Curtis Ling ,  Ramakrishna Akella ,  Brenndon Lee

IPC分类号： H04N7/16

CPC分类号： H04H60/43 ,  H04H20/26 ,  H04H20/40 ,  H04H60/11 ,  H04N21/41407 ,  H04N21/4384

摘要： A wireless communication system is enhanced to allow for low-latency channel surfing and to enable a user to quickly see the content carried over a selected channel while searching channels for desired content. The techniques for reducing the channel change latency may be implemented in a transmitter, receiver, or in a combination of transmitter and receiver. The wireless communication system is optionally a DVB-H communication system. The transmitter may generate and transmit one or more auxiliary channels, where each auxiliary channel contains reduced resolution content corresponding to one or more channels. The receiver may process the one or more auxiliary channels to present the reduced resolution content while processing the full resolution channel for display. The receiver caches portions of content from one or more non-selected channels and presents the cached content when the channel is selected while concurrently searching and processing the full resolution channel content.

摘要翻译： 增强无线通信系统以允许低等待时间的信道冲浪，并且使得用户能够在搜索频道寻找所需内容的同时快速查看通过所选频道载入的内容。 用于减少信道改变等待时间的技术可以在发射机，接收机或发射机和接收机的组合中实现。 无线通信系统可选地是DVB-H通信系统。 发射机可以生成和发送一个或多个辅助信道，其中每个辅助信道包含对应于一个或多个信道的降低的分辨率内容。 接收机可以处理一个或多个辅助信道以呈现降低的分辨率内容，同时处理用于显示的全分辨率信道。 接收器从一个或多个非选择的信道缓存部分内容，并且在同时搜索和处理全分辨率信道内容的同时选择信道时呈现缓存的内容。

公开(公告)号：US20060160518A1

公开(公告)日：2006-07-20

申请号：US11302531

申请日：2005-12-12

申请人： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

发明人： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

IPC分类号： H04B1/26

CPC分类号： H04B1/26 ,  H03D3/007 ,  H03D3/008 ,  H03D3/009 ,  H03D7/14 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1475 ,  H03D7/165 ,  H03D7/166 ,  H03D2200/0086 ,  H03H11/22 ,  H04B1/10 ,  H04B1/109 ,  H04B1/12 ,  H04B1/30 ,  H04B15/00 ,  H04J1/18 ,  H04L27/34

摘要： Receiver architectures and methods of processing harmonic rich input signals employing harmonic suppression mixers are disclosed herein. The disclosed receivers, mixers, and methods enable a receiver to achieve the advantages of switching mixers while greatly reducing the mixer response to the undesired harmonics. A harmonic mixer can include a plurality of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection.

公开(公告)号：US20060083335A1

公开(公告)日：2006-04-20

申请号：US11248657

申请日：2005-10-12

申请人： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

发明人： Kishore Seendripu ,  Raymond Montemayor ,  Sheng Ye ,  Glenn Chang ,  Curtis Ling

IPC分类号： H04L27/22

CPC分类号： H04L5/06 ,  H03D3/008 ,  H03D3/009 ,  H03D7/166 ,  H04B1/30

摘要： A receiver can be configured to include an RF front end that is configured to downconvert a received signal to a baseband signal or a low Intermediate Frequency (IF) signal. The receiver can downconvert the desired signal from an RF frequency in the presence of numerous interference sources to a baseband or low IF signal for filtering and channel selection. The filtered baseband or low IF signal can be converted to a digital representation. The digital representation of the signal can be upconverted in the digital domain to a programmable IF frequency. The digital IF signal can be converted to an analog IF signal that can be processed by legacy hardware.

摘要翻译： 接收机可以被配置为包括被配置为将接收到的信号下变频为基带信号或低中频（IF）信号的RF前端。 接收机可以在存在多个干扰源的情况下将来自RF频率的期望信号下变频到用于滤波和信道选择的基带或低IF信号。 滤波后的基带或低IF信号可以转换为数字表示。 信号的数字表示可以在数字域中上转换成可编程的中频。 数字IF信号可以转换为可由传统硬件处理的模拟IF信号。