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91. 发明申请

US20110227614A1 TCXO Replacement for GPS 有权
标题翻译： TCXO替换GPS
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。

92. 发明申请

US20110105068A1 WIDEBAND TUNER ARCHITECTURE 有权
标题翻译：宽带调谐器架构
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。

93. 发明申请

US20100271558A1 HYBRID RECEIVER ARCHITECTURE USING UPCONVERSION FOLLOWED BY DIRECT DOWNCONVERSION 有权
标题翻译：混合接收机结构使用直接转发后的UPCRONVERSION
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。

94. 发明申请

US20090258625A1 GAIN PARTITIONING IN A RECEIVER 有权
标题翻译：接收器中的增益分配
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。

95. 发明申请

US20090040391A1 TUNER FOR CABLE, SATELLITE AND BROADCAST APPLICATIONS 有权
标题翻译：电缆，卫星和广播应用的调谐器
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。

96. 发明申请

US20080209499A1 CHANNEL CHANGE LATENCY REDUCTION 有权
标题翻译：频道更改减少
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。

97. 发明申请

US20060160518A1 Harmonic reject receiver architecture and mixer 审中-公开
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.

98. 发明申请

US20060083335A1 Receiver architecture with digitally generated intermediate frequency 审中-公开
标题翻译：具有数字生成中频的接收机架构
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。

99. 发明授权

US09991847B2 Method and apparatus for broadband data conversion 有权
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.

100. 发明申请

US20170180787A1 Method And System For Providing A Home Cable Network 审中-公开
公开(公告)号：US20170180787A1
公开(公告)日：2017-06-22
申请号：US15044563
申请日：2016-02-16
申请人： Curtis Ling , Timothy Gallagher
发明人： Curtis Ling , Timothy Gallagher
IPC分类号： H04N21/4363 , H04N21/61
CPC分类号： H04N21/4363 , H04N7/106 , H04N21/2143 , H04N21/2381 , H04N21/6143 , H04N21/6168
摘要： Methods and systems for cross-protocol time synchronization may comprise, for example, in a premises-based network: receiving, by a network controller located at a root node in the premises, signals that conform to one or more first communications protocol; bridging said received signals to conform to a second communications protocol different from the one or more first communications protocol; and communicating said bridged signals to one or more networked devices within said premises-based wired network, wherein only signals conforming to said second communications protocol are concurrently communicated in a frequency range that is independent of frequency range limitations of the one or more first communications protocol and of the second communications protocol, and that is limited only by a frequency range of wiring in the premises-based network. One of the signals conforming to the one or more first communications protocol comprises a data over cable service interface specification (DOCSIS) signal.

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