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1. 发明授权

US08433016B2 Narrow-band interference canceller 有权
标题翻译：窄带干扰消除器
公开(公告)号：US08433016B2
公开(公告)日：2013-04-30
申请号：US12780600
申请日：2010-05-14
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04B1/10
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： The disclosure is directed to a receiver, and methods therefor, including an automatic gain control circuit with a first digital variable gain amplifier that outputs digital samples based on a modulated wireless signal, an interference canceller configured to filter the digital samples using a least mean squares algorithm to reduce narrowband interference, and a second DVGA configured to amplify the filtered digital samples.
摘要翻译：本发明涉及一种接收机及其方法，包括具有基于调制无线信号输出数字样本的第一数字可变增益放大器的自动增益控制电路，被配置为使用最小均方对数字采样进行滤波的干扰消除器算法来减少窄带干扰，第二个DVGA被配置为放大经滤波的数字样本。

2. 发明授权

US07720185B2 Narrow-band interference canceller 有权
标题翻译：窄带干扰消除器
公开(公告)号：US07720185B2
公开(公告)日：2010-05-18
申请号：US11557035
申请日：2006-11-06
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04B1/10
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： The disclosure is directed to a receiver. The receiver includes an interference canceller configured to filter digital samples produced from a modulated signal transmitted over a wireless channel, and a digital variable gain amplifier (DVGA) configured to amplify the filtered digital samples.
摘要翻译：本公开涉及一种接收机。接收机包括被配置为对通过无线信道传输的调制信号产生的数字样本进行滤波的干扰消除器，以及被配置成放大经滤波的数字样本的数字可变增益放大器（DVGA）。

3. 发明申请

US20100220821A1 NARROW-BAND INTERFERENCE CANCELLER 有权
标题翻译：窄带干扰CANCELLER
公开(公告)号：US20100220821A1
公开(公告)日：2010-09-02
申请号：US12780600
申请日：2010-05-14
申请人： BOJAN VRCELJ , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： BOJAN VRCELJ , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04L27/08
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： The disclosure is directed to a receiver, and methods therefor, including an automatic gain control circuit with a first digital variable gain amplifier that outputs digital samples based on a modulated wireless signal, an interference canceller configured to filter the digital samples using a least mean squares algorithm to reduce narrowband interference, and a second DVGA configured to amplify the filtered digital samples.
摘要翻译：本发明涉及一种接收机及其方法，包括具有基于调制无线信号输出数字样本的第一数字可变增益放大器的自动增益控制电路，被配置为使用最小均方对数字采样进行滤波的干扰消除器算法来减少窄带干扰，第二个DVGA被配置为放大经滤波的数字样本。

4. 发明申请

US20080107217A1 NARROW-BAND INTERFERENCE CANCELLER 有权
标题翻译：窄带干扰CANCELLER
公开(公告)号：US20080107217A1
公开(公告)日：2008-05-08
申请号：US11557035
申请日：2006-11-06
申请人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
发明人： Bojan Vrcelj , Ashok Mantravadi , Fuyun Ling , Linbo Li , Raghuraman Krishnamoorthi , Murali Ramaswamy Chari , Vinay Murthy
IPC分类号： H04B1/10
CPC分类号： H04L25/03044 , H04B1/1036 , H04B1/109 , H04B15/00 , H04B2215/061 , H04L2025/03477
摘要： The disclosure is directed to a receiver. The receiver includes an interference canceller configured to filter digital samples produced from a modulated signal transmitted over a wireless channel, and a digital variable gain amplifier (DVGA) configured to amplify the filtered digital samples.
摘要翻译：本公开涉及一种接收机。接收机包括被配置为对通过无线信道传输的调制信号产生的数字样本进行滤波的干扰消除器，以及被配置成放大经滤波的数字样本的数字可变增益放大器（DVGA）。

5. 发明申请

US20060221810A1 Fine timing acquisition 审中-公开
标题翻译：精细定时采集
公开(公告)号：US20060221810A1
公开(公告)日：2006-10-05
申请号：US11372394
申请日：2006-03-08
申请人： Bojan Vrcelj , Fuyun Ling , Raghuraman Krishnamoorthi , Vinay Murthy
发明人： Bojan Vrcelj , Fuyun Ling , Raghuraman Krishnamoorthi , Vinay Murthy
IPC分类号： H04J11/00 , H04J3/06
CPC分类号： H04L27/2656 , H04L27/2663 , H04L27/2665 , H04L27/2675 , H04L27/2695
摘要： A method for synchronizing timing of a receiver to a received orthogonal frequency division multiplexing (OFDM) signal is disclosed. A first timing acquisition is performed with a first received time division multiplexed (TDM) pilot to determine a course timing estimate of the received OFDM signal. A second timing acquisition is performed with a second TDM pilot to determine a fine timing estimate for a OFDM symbol of the received OFDM signal. In the second timing acquisition, the accumulated energy of channel taps over a detection window is determined and a trailing edge of the accumulated energy curve is detected. A Fourier transform (FT) collection window location for subsequent OFDM symbols is adjusted according to the trailing edge information.
摘要翻译：公开了一种用于使接收机的定时与接收的正交频分复用（OFDM）信号同步的方法。利用第一接收时分复用（TDM）导频执行第一定时获取，以确定所接收的OFDM信号的路线定时估计。用第二TDM导频执行第二定时获取，以确定接收到的OFDM信号的OFDM符号的精确定时估计。在第二定时获取中，确定在检测窗口上的通道抽头的累积能量，并且检测累积能量曲线的后沿。根据后沿信息调整后续OFDM符号的傅立叶变换（FT）收集窗口位置。

6. 发明申请

US20100157833A1 METHODS AND SYSTEMS FOR IMPROVED TIMING ACQUISITION FOR VARYING CHANNEL CONDITIONS 审中-公开
标题翻译：改进通道条件改进时间采集的方法和系统
公开(公告)号：US20100157833A1
公开(公告)日：2010-06-24
申请号：US12644909
申请日：2009-12-22
申请人： BOJAN VRCELJ , Krishna K. Mukkavilli , Raghuraman Krishnamoorthi , Vinay Murthy
发明人： BOJAN VRCELJ , Krishna K. Mukkavilli , Raghuraman Krishnamoorthi , Vinay Murthy
IPC分类号： H04L12/26
CPC分类号： H04L27/2675 , H04L5/0048 , H04L7/08 , H04L27/2626 , H04L27/2665 , H04L27/2688 , H04L27/2692 , H04L27/2695
摘要： An improved receiver apparatus and acquisition algorithm using TDM pilots is disclosed. The timing acquisition method presented provides capabilities for adapting to changing channel conditions, in particular varying expected delay spreads. The information on an expected delay spread can be fed back to the initial acquisition algorithm based on previous successful attempts, and the delay spreads measured at that time, such as to set the length of the detection window used to in the TDM pilot processing. Based on the delay spread information, the algorithm for processing the specialized TDM pilot can adaptively modify the timing acquisition parameters for more robust performance under interference conditions. This may involve reducing the length of the detection window to just a little more than or equal to the maximum expected delay spread, which reduces sensitivity of the fine timing acquisition to signal noise.
摘要翻译：公开了一种使用TDM导频的改进的接收机设备和采集算法。提出的定时获取方法提供了适应不断变化的信道条件，特别是改变预期延迟传播的能力。关于期望延迟扩展的信息可以基于先前的成功尝试反馈到初始捕获算法，并且在那时测量的延迟扩展，例如设置在TDM导频处理中使用的检测窗口的长度。基于延迟扩展信息，用于处理专用TDM导频的算法可以自适应地修改定时获取参数，以在干扰条件下实现更强的性能。这可能涉及将检测窗口的长度减小到大于或等于最大预期延迟扩展的一点，这降低了精确定时采集对信号噪声的灵敏度。

7. 发明授权

US08605836B2 Automatic gain control for a wireless receiver 失效
标题翻译：无线接收机的自动增益控制
公开(公告)号：US08605836B2
公开(公告)日：2013-12-10
申请号：US11373612
申请日：2006-03-09
申请人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
发明人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08
CPC分类号： H03G7/007 , H03G3/3068 , H03G3/3078 , H03G3/3089 , H04B1/18 , H04L27/2601 , H04L27/2614 , H04L27/2647
摘要： Techniques for performing automatic gain control (AGC) at a wireless receiver are described. The total gain for the wireless receiver is achieved with discrete gain steps for analog circuitry and continuous gain for a digital variable gain amplifier (DVGA). An AGC loop is updated based on power measurements for an output signal from the DVGA. A first gain for the analog circuitry is selected from among multiple discrete gain values based on the AGC loop to maintain the average power of a baseband signal within a predetermined range at an analog-to-digital converter (ADC) input. A second gain for the DVGA is selected based on the AGC loop to maintain the average power of the output signal at a reference power level. The first gain is switched in a manner to avoid saturation of the ADC caused by the baseband signal and to provide switching hysteresis. The AGC may be performed in log domain and with multiple modes.
摘要翻译：描述了在无线接收机处执行自动增益控制（AGC）的技术。无线接收机的总增益通过模拟电路的离散增益步长和数字可变增益放大器（DVGA）的连续增益来实现。基于来自DVGA的输出信号的功率测量来更新AGC环路。基于AGC环路从多个离散增益值中选择模拟电路的第一增益，以将模拟 - 数字转换器（ADC）输入端的基带信号的平均功率维持在预定范围内。基于AGC环路选择DVGA的第二增益，以将输出信号的平均功率维持在参考功率电平。第一增益以避免由基带信号引起的ADC饱和并提供开关滞后的方式进行切换。 AGC可以在对数域和多种模式下执行。

8. 发明授权

US07873126B2 Method and system for automatic gain control with intelligent selection of signal samples 失效
标题翻译：智能选择信号样本的自动增益控制方法和系统
公开(公告)号：US07873126B2
公开(公告)日：2011-01-18
申请号：US11397422
申请日：2006-04-03
申请人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
发明人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08
CPC分类号： H03G3/3052
摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry. Every n samples of the broadcast signals, an energy estimate of the AGC output signal is used to calculate and update a gain control value. Instead of using all n samples occurring subsequent to a previous gain control value update, only a subset of those n samples are used. In particular the first half of the n samples may be discarded in the energy estimate calculation while only the second half of the n samples may be used.
摘要翻译：本公开涉及包括自动增益控制（AGC）电路的移动通信设备。广播信号的每n个样本，AGC输出信号的能量估计用于计算和更新增益控制值。不是使用在先前的增益控制值更新之后发生的所有n个样本，而是仅使用那些n个采样的子集。特别地，可以在能量估计计算中丢弃n个样本的前半部分，而只能使用n个样本的后半部分。

9. 发明申请

US20100158168A1 METHOD AND SYSTEM FOR AUTOMATIC GAIN CONTROL DURING SIGNAL ACQUISITION 有权
标题翻译：信号采集期间自动增益控制的方法与系统
公开(公告)号：US20100158168A1
公开(公告)日：2010-06-24
申请号：US12720534
申请日：2010-03-09
申请人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
发明人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08
CPC分类号： H03G3/3052
摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry and operates in either a tracking mode or an acquisition mode. A received signal is sampled n times to calculate an energy estimate that is used to set the gain control values within the AGC circuitry. The value of n varies depending on whether the handset is operating in the acquisition mode or the tracking mode. Acquisition mode is typically considered to be the mode prior to coarse timing acquisition, also referred to as frame acquisition.
摘要翻译：本公开涉及包括自动增益控制（AGC）电路并且以跟踪模式或采集模式操作的移动通信设备。接收到的信号被采样n次以计算用于设置AGC电路内的增益控制值的能量估计。 n的值根据手机在采集模式或跟踪模式下的运行而变化。采集模式通常被认为是粗略定时采集之前的模式，也称为帧采集。

10. 发明授权

US07702046B2 Method and system for automatic gain control during signal acquisition 失效
标题翻译：信号采集过程中自动增益控制的方法和系统
公开(公告)号：US07702046B2
公开(公告)日：2010-04-20
申请号：US11397256
申请日：2006-04-03
申请人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
发明人： Vinay Murthy , Linbo Li , Raghuraman Krishnamoorthi
IPC分类号： H04L27/08
CPC分类号： H03G3/3052
摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry and operates in either a tracking mode or an acquisition mode. A received signal is sampled n times to calculate an energy estimate that is used to set the gain control values within the AGC circuitry. The value of n varies depending on whether the handset is operating in the acquisition mode or the tracking mode. Acquisition mode is typically considered to be the mode prior to coarse timing acquisition, also referred to as frame acquisition.
摘要翻译：本公开涉及包括自动增益控制（AGC）电路并且以跟踪模式或采集模式操作的移动通信设备。接收到的信号被采样n次以计算用于设置AGC电路内的增益控制值的能量估计。 n的值根据手机在采集模式或跟踪模式下的运行而变化。采集模式通常被认为是粗略定时采集之前的模式，也称为帧采集。

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