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公开(公告)号：US09551792B2
公开(公告)日：2017-01-24
申请号：US14157179
申请日：2014-01-16
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Maxime LeClercq
CPC classification number: G01S19/24 , G01S19/246 , G01S19/29 , G01S19/30 , G01S19/37
Abstract: A system and method for improving acquisition sensitivity and tracking performance of a GPS receiver using multiple antennas is provided. In an embodiment, the acquisition sensitivity can be improved by determining the correlation weight of each received path signal associated with one antenna from a plurality of antennas and then combining the path signals based on their respective correlation weight. In another embodiment, carrier offset correction information of each path signal is individually determined and then summed together to be used for tracking the code phase in a code phase tracking loop. The code phase tracking loop generates an early code and a late code that are used to determine the code phase error. The system includes digital adaptive filters to mitigate narrowband and broadband noises of a received GPS signal, wherein the digital adaptive filters are switched on periodically or by external events.
Abstract translation: 提供了一种用于提高使用多个天线的GPS接收机的采集灵敏度和跟踪性能的系统和方法。 在一个实施例中，可以通过确定与多个天线中的一个天线相关联的每个接收路径信号的相关权重，然后基于它们各自的相关权重组合路径信号来提高采集灵敏度。 在另一个实施例中，各路径信号的载波偏移校正信息被单独确定，然后相加在一起，以用于跟踪码相位跟踪环路中的码相位。 代码相位跟踪循环产生用于确定代码相位误差的早期代码和后期代码。 该系统包括数字自适应滤波器以减轻接收的GPS信号的窄带和宽带噪声，其中数字自适应滤波器周期性地或外部事件被接通。
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公开(公告)号：US09432104B2
公开(公告)日：2016-08-30
申请号：US14690607
申请日：2015-04-20
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Curtis Ling , Sugbong Kang
CPC classification number: H04B7/0845 , H04B1/16 , H04B7/0857 , H04B7/0885 , H04B7/12 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/03159 , H04L25/14 , H04L27/2649 , H04L2025/03414 , H04L2025/03426
Abstract: A system may comprise a plurality of signal processing paths, a bin-wise combiner, an inverse transformation block, and a DAC. Each signal processing path may comprise a transformation block that is operable to transform a first time-domain digital signal to an associated frequency-domain signal having a plurality of subband signals. The bin-wise combiner may be operable to combine corresponding subband signals of the plurality of signal processing paths. The inverse transformation block may be operable to transform output of the bin-wise combiner to an second time-domain signal. The DAC may be operable to converts the second time-domain signal to a corresponding analog signal.
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公开(公告)号：US20140218235A1
公开(公告)日：2014-08-07
申请号：US13962876
申请日：2013-08-08
Applicant: MaxLinear, Inc.
Inventor： Maxime Leclercq , Ioannis Spyropoulos , Anand K. Anandakumar , Curtis Ling
IPC: G01S19/34
CPC classification number: G01S19/34
Abstract: A GNSS system operates intermittently and has adaptive activity and sleep time in order to reduce power consumption. The GNSS system provides an enhanced estimate of its position in the absence of GNSS signals of sufficient strength. The user's activity and behavior is modeled and used to improve performance, response time, and power consumption of the GNSS system. The user model is based, in part, on the received GNSS signals, a history of the user's positions, velocity, time, and inputs from other sensors disposed in the GNSS system, as well as data related to the network. During each activity time, the GNSS receiver performs either tracking, or acquisition followed by tracking The GNSS receiver supports both normal acquisition as well as low-power acquisition.
Abstract translation: GNSS系统间歇运行，具有自适应活动和休眠时间，以降低功耗。 在没有足够强度的GNSS信号的情况下，GNSS系统提供对其位置的增强估计。 用户的活动和行为被建模并用于提高GNSS系统的性能，响应时间和功耗。 用户模型部分地基于所接收的GNSS信号，用户位置的历史，速度，时间以及设置在GNSS系统中的其他传感器的输入以及与网络有关的数据。 在每个活动时间内，GNSS接收机执行跟踪或采集跟踪跟踪。GNSS接收机支持正常采集以及低功耗采集。
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公开(公告)号：US09395445B2
公开(公告)日：2016-07-19
申请号：US13962876
申请日：2013-08-08
Applicant: MaxLinear, Inc.
Inventor： Maxime Leclercq , Ioannis Spyropoulos , Anand K. Anandakumar , Curtis Ling
CPC classification number: G01S19/34
Abstract: A GNSS system operates intermittently and has adaptive activity and sleep time in order to reduce power consumption. The GNSS system provides an enhanced estimate of its position in the absence of GNSS signals of sufficient strength. The user's activity and behavior is modeled and used to improve performance, response time, and power consumption of the GNSS system. The user model is based, in part, on the received GNSS signals, a history of the user's positions, velocity, time, and inputs from other sensors disposed in the GNSS system, as well as data related to the network. During each activity time, the GNSS receiver performs either tracking, or acquisition followed by tracking The GNSS receiver supports both normal acquisition as well as low-power acquisition.
Abstract translation: GNSS系统间歇运行，具有自适应活动和休眠时间，以降低功耗。 在没有足够强度的GNSS信号的情况下，GNSS系统提供对其位置的增强估计。 用户的活动和行为被建模并用于提高GNSS系统的性能，响应时间和功耗。 用户模型部分地基于所接收的GNSS信号，用户位置的历史，速度，时间以及设置在GNSS系统中的其他传感器的输入以及与网络有关的数据。 在每个活动时间内，GNSS接收机执行跟踪或采集跟踪跟踪。GNSS接收机支持正常采集以及低功耗采集。
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公开(公告)号：US09055324B2
公开(公告)日：2015-06-09
申请号：US14107524
申请日：2013-12-16
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Sridhar Ramesh
CPC classification number: H04N21/4305 , H04L27/2656 , H04L27/2657 , H04L27/2665 , H04L27/2671 , H04L27/2675 , H04L27/2676 , H04L27/2685 , H04L27/2695 , H04N21/4343 , H04N21/44016
Abstract: A method and an apparatus for achieving fast resynchronization of received signals in a time slice in DVB-T/H systems. When the clock drift is low, the location of the symbol window can be decided based on a previous time slice. When the clock drift is high and when there are large delay spreads, the location of the symbol window can be decided based on the detected scattered pilot positions. The placement of the symbol window can further be enhanced through processing of the received TPS bits.
Abstract translation: 一种用于在DVB-T / H系统的时间片中实现接收信号的快速重新同步的方法和装置。 当时钟漂移低时，可以基于先前的时间片来确定符号窗口的位置。 当时钟漂移很高时，并且当存在大的延迟扩展时，可以基于检测到的分散导频位置来确定符号窗口的位置。 可以通过处理所接收的TPS位来进一步增强符号窗口的放置。
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Patent Agency Ranking
公开(公告)号：US20160373182A1
公开(公告)日：2016-12-22
申请号：US15251349
申请日：2016-08-30
Applicant: Maxlinear, Inc.
Inventor： Anand K. Anandakumar , Curtis Ling , Sugbong Kang
CPC classification number: H04B7/0845 , H04B1/16 , H04B7/0857 , H04B7/0885 , H04B7/12 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/03159 , H04L25/14 , H04L27/2649 , H04L2025/03414 , H04L2025/03426
Abstract: A system may comprise a plurality of signal processing paths, a bin-wise combiner, an inverse transformation block, and a DAC. Each signal processing path may comprise a transformation block that is operable to transform a first time-domain digital signal to an associated frequency-domain signal having a plurality of subband signals. The bin-wise combiner may be operable to combine corresponding subband signals of the plurality of signal processing paths. The inverse transformation block may be operable to transform output of the bin-wise combiner to an second time-domain signal. The DAC may be operable to converts the second time-domain signal to a corresponding analog signal.
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公开(公告)号：US09014649B2
公开(公告)日：2015-04-21
申请号：US14230055
申请日：2014-03-31
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Curtis Ling , Sugbong Kang
CPC classification number: H04B7/0845 , H04B1/16 , H04B7/0857 , H04B7/0885 , H04B7/12 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/03159 , H04L25/14 , H04L27/2649 , H04L2025/03414 , H04L2025/03426
Abstract: A system may comprise a plurality of signal processing paths, a bin-wise combiner, an inverse transformation block, and a DAC. Each signal processing path may comprise a transformation block that is operable to transform a first time-domain digital signal to an associated frequency-domain signal having a plurality of subband signals. The bin-wise combiner may be operable to combine corresponding subband signals of the plurality of signal processing paths. The inverse transformation block may be operable to transform output of the bin-wise combiner to an second time-domain signal. The DAC may be operable to converts the second time-domain signal to a corresponding analog signal.
Abstract translation: 系统可以包括多个信号处理路径，二进制组合器，逆变换块和DAC。 每个信号处理路径可以包括变换块，其可操作以将第一时域数字信号变换为具有多个子带信号的相关联的频域信号。 二进制组合器可以可操作以组合多个信号处理路径的相应子带信号。 逆变换块可以用于将二进制组合器的输出变换为第二时域信号。 DAC可以用于将第二时域信号转换成相应的模拟信号。
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公开(公告)号：US09252780B2
公开(公告)日：2016-02-02
申请号：US13784761
申请日：2013-03-04
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Hyungjin Kim , Curtis Ling
CPC classification number: H03L1/026 , G01S19/235 , H03L1/022 , H03L7/1976
Abstract: 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.
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公开(公告)号：US20150326301A1
公开(公告)日：2015-11-12
申请号：US14690607
申请日：2015-04-20
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Curtis Ling , Sugbong Kang
CPC classification number: H04B7/0845 , H04B1/16 , H04B7/0857 , H04B7/0885 , H04B7/12 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/03159 , H04L25/14 , H04L27/2649 , H04L2025/03414 , H04L2025/03426
Abstract: A system may comprise a plurality of signal processing paths, a bin-wise combiner, an inverse transformation block, and a DAC. Each signal processing path may comprise a transformation block that is operable to transform a first time-domain digital signal to an associated frequency-domain signal having a plurality of subband signals. The bin-wise combiner may be operable to combine corresponding subband signals of the plurality of signal processing paths. The inverse transformation block may be operable to transform output of the bin-wise combiner to an second time-domain signal. The DAC may be operable to converts the second time-domain signal to a corresponding analog signal.
Abstract translation: 系统可以包括多个信号处理路径，二进制组合器，逆变换块和DAC。 每个信号处理路径可以包括变换块，其可操作以将第一时域数字信号变换为具有多个子带信号的相关联的频域信号。 二进制组合器可以可操作以组合多个信号处理路径的相应子带信号。 逆变换块可以用于将二进制组合器的输出变换为第二时域信号。 DAC可以用于将第二时域信号转换成相应的模拟信号。
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公开(公告)号：US20140294056A1
公开(公告)日：2014-10-02
申请号：US14230055
申请日：2014-03-31
Applicant: MaxLinear, Inc.
Inventor： Anand K. Anandakumar , Curtis Ling , Sugbong Kang
CPC classification number: H04B7/0845 , H04B1/16 , H04B7/0857 , H04B7/0885 , H04B7/12 , H04L5/0023 , H04L5/0048 , H04L25/0204 , H04L25/03159 , H04L25/14 , H04L27/2649 , H04L2025/03414 , H04L2025/03426
Abstract: A system may comprise a plurality of signal processing paths, a bin-wise combiner, an inverse transformation block, and a DAC. Each signal processing path may comprise a transformation block that is operable to transform a first time-domain digital signal to an associated frequency-domain signal having a plurality of subband signals. The bin-wise combiner may be operable to combine corresponding subband signals of the plurality of signal processing paths. The inverse transformation block may be operable to transform output of the bin-wise combiner to an second time-domain signal. The DAC may be operable to converts the second time-domain signal to a corresponding analog signal.
Abstract translation: 系统可以包括多个信号处理路径，二进制组合器，逆变换块和DAC。 每个信号处理路径可以包括变换块，其可操作以将第一时域数字信号变换为具有多个子带信号的相关联的频域信号。 二进制组合器可以可操作以组合多个信号处理路径的相应子带信号。 逆变换块可以用于将二进制组合器的输出变换为第二时域信号。 DAC可以用于将第二时域信号转换成相应的模拟信号。
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