公开(公告)号：US20100034242A1

公开(公告)日：2010-02-11

申请号：US12579131

申请日：2009-10-14

申请人： BOJAN VRCELJ ,  Fuyun Ling ,  Michael Mao Wang

发明人： BOJAN VRCELJ ,  Fuyun Ling ,  Michael Mao Wang

IPC分类号： H04B1/38 ,  H04L7/00

CPC分类号： H04L27/2662 ,  H04L27/2676

摘要： Methods and apparatus for setting timing of sampling of one or more symbols. The disclosed methods account for at least three types of effective interference (EI) and are used to set the timing of a sampling window for sampling received symbols. The methods includes setting timing based on determining an energy density function accounting for both static and dynamic EI, determining the minimum of a total energy profile and sliding the sampling window to ensure that the minimum point is at a predetermined point, and determining and using a composite energy profile accounting for short term and long term fading effects. The disclosed apparatus include a transceiver employing one or more of the disclosed methods for setting timing when receiving the symbols.

摘要翻译： 用于设置一个或多个符号的采样定时的方法和装置。 所公开的方法至少有三种类型的有效干扰（EI），并且用于设置用于采样接收符号的采样窗口的定时。 所述方法包括基于确定静态和动态EI两者的能量密度函数来设定定时，确定总能量分布的最小值，并滑动采样窗口以确保最小点在预定点，以及确定和使用 复合能量曲线描述短期和长期衰落影响。 所公开的装置包括采用一种或多种所述方法的收发机，用于在接收符号时设置定时。

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。

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。