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    • 41. 发明申请
    • GNSS RECEPTION USING DISTRIBUTED TIME SYNCHRONIZATION
    • 使用分布式时间同步的GNSS接收
    • WO2011082182A1
    • 2011-07-07
    • PCT/US2010/062258
    • 2010-12-28
    • MAXLINEAR, INC.LING, Curtis
    • LING, Curtis
    • G01S3/02
    • H04L7/0079G01S19/05G01S19/235G01S19/246H04B1/707
    • A GNSS receiver communicates with any connectivity device, such as a WiFi device that is, in turn, in communication with a wired network having access to the DTI timing. Such connectivity devices may set their timing and frame synchronization to the DTI and thus serve as Geopositiong beacons, thereby enabling the GNSS receiver to accurately determine its position. The GNSS receiver may also use the DTI timing supplied by such a network to perform relatively long integration time so as to achieve substantially improved sensitivity that is necessary for indoor Geopositioning applications. Furthermore, the GNSS data, such as satellite orbital information, may also be propagated by such devices at high speed. By providing this data to the GNSS receivers via such connectivity devices in a rapid fashion, the GNSS receivers are enabled to receive the transmitted data associated with the satellite without waiting for the GNSS transmission from the satellites.
    • GNSS接收器与任何连接设备进行通信,诸如与具有访问DTI定时的有线网络通信的WiFi设备。 这样的连接设备可以将它们的定时和帧同步设置为DTI,从而用作Geopositiong信标,从而使GNSS接收机能够准确地确定其位置。 GNSS接收机还可以使用由这种网络提供的DTI定时来执行相对较长的积分时间,以便实现对于室内地理定位应用所需的显着提高的灵敏度。 此外,诸如卫星轨道信息的GNSS数据也可以由这些设备以高速传播。 通过以快速方式通过这种连接装置向GNSS接收机提供该数据,GNSS接收机能够接收与卫星相关联的发射数据,而不用等待来自卫星的GNSS传输。
    • 42. 发明申请
    • CLOCK-OUT AMPLITUDE CALIBRATION SCHEME TO ENSURE SINE-WAVE CLOCK-OUT SIGNAL
    • CLOCK-OUT AMPLITUDE校准方案,以确保正弦波时钟信号
    • WO2011063352A1
    • 2011-05-26
    • PCT/US2010/057671
    • 2010-11-22
    • MAXLINEAR, INC.O'SULLIVAN, Tomas
    • O'SULLIVAN, Tomas
    • H03K5/153
    • H03G3/30H03B5/32H03G3/3089H03L5/00
    • A clock generator includes, in part, a buffer, a peak detector and a control logic. The buffer generates a clock output signal in response to receiving a clock signal and a feedback signal that controls the gain of the buffer. If the peak detector detects that the amplitude of the output signal is higher than the upper bound of the predefined range, the gain value applied to the variable buffer is decreased. If the peak detector detects that the amplitude of the output signal is lower than the lower bound of the predefined range, the gain value applied to the variable buffer to increased. If the peak detector detects that the amplitude of the output signal is within the predefined range, no change is made to the gain value applied to the variable buffer. The control logic generates the feedback signal in response to the peak detector's output signal.
    • 时钟发生器部分地包括缓冲器,峰值检测器和控制逻辑。 响应于接收到时钟信号和控制缓冲器的增益的反馈信号,缓冲器产生时钟输出信号。 如果峰值检测器检测到输出信号的幅度高于预定范围的上限,则增加到可变缓冲器的增益值减小。 如果峰值检测器检测到输出信号的幅度低于预定义范围的下限,则增加到可变缓冲器的增益值增加。 如果峰值检测器检测到输出信号的幅度在预定范围内,则不会对施加于可变缓冲器的增益值发生变化。 控制逻辑响应于峰值检测器的输出信号产生反馈信号。
    • 44. 发明申请
    • DYNAMIC BANDWIDTH CONTROL SCHEME OF A FRAC-N PLL IN A RECEIVER
    • 接收机中FRAC-N PLL的动态带宽控制方案
    • WO2011060194A1
    • 2011-05-19
    • PCT/US2010/056418
    • 2010-11-11
    • MAXLINEAR, INC.YE, ShengCHOMINSKI, Paul
    • YE, ShengCHOMINSKI, Paul
    • H03K9/00
    • H04B1/16H03L7/0898H03L7/1976
    • A receiver, in accordance with one embodiment of the present invention, includes a mixer, a filter, a received signal strength indicator, and a control loop. The mixer is adapted to convert the frequency of a received signal. The filter is adapted to filter out undesired noise that may be present in the output signal of the mixer. The received signal strength indicator is adapted to detect blocker (also known as jammer) signals that may be present in the output signal of the low-pass filter and generate a feedback signal in response. The control loop is adapted to vary its bandwidth in response to an output signal of the received signal strength indicator. The control loop supplies an oscillating signal to the mixer.
    • 根据本发明的一个实施例的接收机包括混频器,滤波器,接收信号强度指示器和控制回路。 混频器适于转换接收信号的频率。 滤波器适于滤除可能存在于混频器的输出信号中的不期望的噪声。 所接收的信号强度指示符适于检测可能存在于低通滤波器的输出信号中的阻塞(也称为干扰信号)信号,并产生响应的反馈信号。 控制回路适于响应于接收信号强度指示器的输出信号来改变其带宽。 控制回路向振荡器提供振荡信号。
    • 45. 发明申请
    • PROGRAMMABLE DIGITAL CLOCK CONTROL SCHEME TO MINIMIZE SPUR EFFECT ON A RECEIVER
    • 可编程数字时钟控制方案,以最大限度地减少对接收器的影响
    • WO2011053726A1
    • 2011-05-05
    • PCT/US2010/054547
    • 2010-10-28
    • MAXLINEAR, INC.YU, Shuang
    • YU, Shuang
    • H04B1/04
    • H04B15/02H04B1/10H04B2215/065
    • A device includes an analog front end for receiving a radio frequency (RF) signal. The analog front end contains a local oscillator that is tuned to a local oscillation frequency for down-converting the received RF signal to a first intermediate frequency (IF) signal. An analog-to-digital converter module converts the first IF signal to a digital baseband signal. The device also includes a digital processing unit for processing the baseband signal. The digital processing unit generates multiple clock signals from a reference oscillator having digitally adjustable reference frequency. The reference frequency and the multiple clock signals may interfere with the local oscillator and generate several frequency spurs that may fall within the bandwidth of the received RF signal. In a preferred embodiment, the digital processing unit adjusts the reference frequency by a certain amount so that the spurs do not fall within the RF signal bandwidth.
    • 一种装置包括用于接收射频(RF)信号的模拟前端。 模拟前端包含调谐到本地振荡频率的本地振荡器,用于将接收到的RF信号下变频到第一中频(IF)信号。 模数转换器模块将第一IF信号转换为数字基带信号。 该装置还包括用于处理基带信号的数字处理单元。 数字处理单元从具有数字可调参考频率的参考振荡器产生多个时钟信号。 参考频率和多个时钟信号可能会干扰本地振荡器并产生可能落在接收的RF信号的带宽内的多个频率杂散。 在优选实施例中,数字处理单元将参考频率调整一定量,使得杂散不落入RF信号带宽内。
    • 47. 发明申请
    • I/Q CALIBRATION TECHNIQUES
    • I / Q校准技术
    • WO2009045966A1
    • 2009-04-09
    • PCT/US2008/078174
    • 2008-09-29
    • MAXLINEAR, INC.LING, CurtisYU, Shuang
    • LING, CurtisYU, Shuang
    • H04B1/26
    • H04L27/0014H04B1/30
    • A receiver includes a static I/Q calibration block and a correlation/integration block. The static I/Q calibration block is configured to substantially eliminate mismatches between in-phase and quadrature components of a portion of the spectrum having associated I/Q mismatches that are relatively frequency-independent. The correlation/integration block is configured to substantially eliminate mismatches between the in-phase and quadrature components of portions of the spectrum having associated I/Q mismatches that are relatively frequency-dependent in accordance with a pair of signals generated by the static I/C calibration block.
    • 接收机包括静态I / Q校准块和相关/积分块。 静态I / Q校准块被配置为基本上消除具有相对频率无关的相关联的I / Q失配的频谱的一部分的同相和正交分量之间的失配。 相关/积分块被配置为基本上消除具有相关的I / Q失配的频谱部分的相位和正交分量之间的不匹配,这些失配与根据由静态I / C产生的一对信号相对地依赖于频率 校准块。
    • 50. 发明申请
    • CHANNEL CHANGE LATENCY REDUCTION
    • 频道更改减少
    • WO2008103996A1
    • 2008-08-28
    • PCT/US2008/054915
    • 2008-02-25
    • MAXLINEAR, INC.RAMESH, SridharLING, CurtisAKELLA, RamakrishnaLEE, Brenndon
    • RAMESH, SridharLING, CurtisAKELLA, RamakrishnaLEE, Brenndon
    • H04N7/173
    • H04H60/43H04H20/26H04H20/40H04H60/11H04N21/41407H04N21/4384
    • 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.
    • 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携带的内容。 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。