公开(公告)号：US20110179099A1

公开(公告)日：2011-07-21

申请号：US12727908

申请日：2010-03-19

申请人： Gang HU ,  Yuanfei Nie ,  Meiwu Wu

发明人： Gang HU ,  Yuanfei Nie ,  Meiwu Wu

IPC分类号： G06F17/17

CPC分类号： H03H17/0685 ,  H03H17/0275 ,  H03H17/0642

摘要： Data rate conversion devices and methods are provided. A method for converting a first digital signal having a first sampling rate into a second digital signal having a sampling rate close to a predetermined second sampling rate comprises the following operations: when the ratio of the first sampling rate to the second sampling rate is a repeating infinite decimal, calculate at least two calibrating coefficient values and output the calibrating coefficient values according to a predetermined rule; conduct overflow operation on the output calibrating coefficient; and interpolate the first digital signal using the output calibrating coefficient and the result of the overflow operation to obtain the second digital signal such that during any period of a certain length along time axis, sampling times of the second digital signal equals to sampling times of the second sampling rate.

摘要翻译： 提供数据速率转换设备和方法。 一种用于将具有第一采样率的第一数字信号转换成具有接近预定第二采样率的采样率的第二数字信号的方法包括以下操作：当第一采样率与第二采样率的比率是重复的 无限小数，计算至少两个校准系数值，并根据预定规则输出校准系数值; 对输出校准系数进行上溢操作; 并且使用输出校准系数和溢出操作的结果内插第一数字信号以获得第二数字信号，使得在沿着时间轴的一定长度的任何周期期间，第二数字信号的采样时间等于 第二次采样率。

公开(公告)号：US08509365B2

公开(公告)日：2013-08-13

申请号：US12933416

申请日：2010-08-03

申请人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

发明人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

IPC分类号： H03D1/04

CPC分类号： H03H21/0021 ,  H03H2021/0094

摘要： The present invention relates to a blind adaptive filter for narrowband interference cancellation, which includes an adaptive filter, a delay unit coupled to the adaptive filter for generating a delayed signal with a predetermined delay length from the output signal of the adaptive filter, and an error calculation unit coupled to the adaptive filter and the delay unit. The error calculation unit compares the output signal from the adaptive filter and the delayed signal from the delay unit to extract error information, and feedback the first error information to the adaptive filter. The first error information is formed of a transfer function including a number of coefficients, and used to adjust the adaptive filter and remove interference in the next input signal. The disclosed technique is also applicable in wideband receivers, as well as resisting multiple strong narrowband interferences having a frequency sweep rate of tens of milliseconds.

摘要翻译： 本发明涉及一种用于窄带干扰消除的盲自适应滤波器，其包括自适应滤波器，耦合到自适应滤波器的延迟单元，用于从自适应滤波器的输出信号产生具有预定延迟长度的延迟信号，以及误差 计算单元耦合到自适应滤波器和延迟单元。 误差计算单元将来自自适应滤波器的输出信号和来自延迟单元的延迟信号进行比较以提取错误信息，并将第一误差信息反馈给自适应滤波器。 第一误差信息由包括多个系数的传递函数形成，并用于调整自适应滤波器并消除下一个输入信号中的干扰。 所公开的技术也可应用于宽带接收机，以及抵抗具有几十毫秒的频率扫描速率的多个强窄带干扰。

公开(公告)号：US20130156138A1

公开(公告)日：2013-06-20

申请号：US13819276

申请日：2011-03-17

申请人： Yuanfei Nie ,  Gang Hu ,  Meiwu Wu

发明人： Yuanfei Nie ,  Gang Hu ,  Meiwu Wu

IPC分类号： H04B1/10

CPC分类号： H04B1/1081 ,  H04L25/022 ,  H04L25/0228

摘要： The present invention relates to a method and system for channel estimation. First, pilot signals are extracted from a received multi-path signal, in which each pilot signal includes a first pilot and a second pilot. Then, an initially estimated channel frequency-domain response is obtained based on the extracted first pilot. Afterward, a frequency-domain response estimate of each pilot frequency in the second pilot is calculated according to the obtained initially estimated channel frequency-domain response, an actual value of each pilot frequency in the second pilot is obtained based on the extracted second pilot, and a deviation between the frequency-domain response estimate and the actual value of each pilot frequency is calculated. When it is detected that aliasing components exist in the initially estimated channel frequency-domain response, a center of each aliasing component is determined according to the deviation, so as to determine an estimated position of each aliasing component. Finally, the initially estimated channel frequency-domain response is corrected according to the estimated positions of the aliasing components, so as to obtain an accurate channel estimation response.

摘要翻译： 本发明涉及一种用于信道估计的方法和系统。 首先，从接收的多路径信号中提取导频信号，其中每个导频信号包括第一导频和第二导频。 然后，基于提取的第一导频获得初始估计的信道频域响应。 然后，根据获得的初始估计的信道频域响应来计算第二导频中的每个导频的频域响应估计，基于提取的第二导频获得第二导频中的每个导频的实际值， 并且计算频域响应估计与每个导频的实际值之间的偏差。 当检测到初始估计的信道频域响应中存在混叠分量时，根据偏差确定每个混叠分量的中心，以便确定每个混叠分量的估计位置。 最后，根据混叠分量的估计位置校正初始估计的信道频域响应，从而获得准确的信道估计响应。

公开(公告)号：US08923456B2

公开(公告)日：2014-12-30

申请号：US13819276

申请日：2011-03-17

申请人： Yuanfei Nie ,  Gang Hu ,  Meiwu Wu

发明人： Yuanfei Nie ,  Gang Hu ,  Meiwu Wu

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08 ,  H04L25/02

CPC分类号： H04B1/1081 ,  H04L25/022 ,  H04L25/0228

摘要： The present invention relates to a method and system for channel estimation. First, pilot signals are extracted from a received multi-path signal, in which each pilot signal includes a first pilot and a second pilot. Then, an initially estimated channel frequency-domain response is obtained based on the extracted first pilot. Afterward, a frequency-domain response estimate of each pilot frequency in the second pilot is calculated according to the obtained initially estimated channel frequency-domain response, an actual value of each pilot frequency in the second pilot is obtained based on the extracted second pilot, and a deviation between the frequency-domain response estimate and the actual value of each pilot frequency is calculated. When it is detected that aliasing components exist in the initially estimated channel frequency-domain response, a center of each aliasing component is determined according to the deviation, so as to determine an estimated position of each aliasing component. Finally, the initially estimated channel frequency-domain response is corrected according to the estimated positions of the aliasing components, so as to obtain an accurate channel estimation response.

摘要翻译： 本发明涉及一种用于信道估计的方法和系统。 首先，从接收的多路径信号中提取导频信号，其中每个导频信号包括第一导频和第二导频。 然后，基于提取的第一导频获得初始估计的信道频域响应。 然后，根据所获得的初始估计的信道频域响应来计算第二导频中的每个导频的频域响应估计，基于提取的第二导频获得第二导频中的每个导频的实际值， 并且计算频域响应估计与每个导频的实际值之间的偏差。 当检测到初始估计的信道频域响应中存在混叠分量时，根据偏差确定每个混叠分量的中心，以便确定每个混叠分量的估计位置。 最后，根据混叠分量的估计位置校正初始估计的信道频域响应，从而获得准确的信道估计响应。

公开(公告)号：US08923447B2

公开(公告)日：2014-12-30

申请号：US13813189

申请日：2011-03-22

申请人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

发明人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

IPC分类号： H04L27/06 ,  H04L25/02 ,  H04L25/03

CPC分类号： H04L25/0242 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/03299

摘要： A channel estimation method and a channel estimation system based on time-domain training sequence are provided. The channel estimation system first acquires an initial channel vector used for channel estimation of a current frame, and calculates an algorithm initial vector based on a training sequence vector contained in a received receiving signal vector and the receiving signal vector, then performs estimation based on the initial channel vector and the algorithm initial vector and using a conjugate gradient method based on a preprocessing matrix to acquire each channel estimation value, and eventually perform noise reduction processing on each channel estimation value based on a first predetermined threshold value to acquire a final channel estimation value. Compared with the existing channel estimation methods, the present invention has a shorter delay and lower calculation complexity, and thus can be easily implemented.

摘要翻译： 提供了基于时域训练序列的信道估计方法和信道估计系统。 信道估计系统首先获取用于当前帧的信道估计的初始信道向量，并且基于接收到的接收信号向量中包含的训练序列向量和接收信号向量来计算算法初始向量，然后基于 初始信道向量和算法初始向量，并且使用基于预处理矩阵的共轭梯度方法来获取每个信道估计值，并且基于第一预定阈值最终对每个信道估计值执行噪声降低处理以获得最终信道估计 值。 与现有的信道估计方法相比，本发明具有更短的延迟和更低的计算复杂度，因此可以容易地实现。

公开(公告)号：US08554817B2

公开(公告)日：2013-10-08

申请号：US12727908

申请日：2010-03-19

申请人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

发明人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

IPC分类号： G06F17/17 ,  G06F7/38 ,  G06F1/02

CPC分类号： H03H17/0685 ,  H03H17/0275 ,  H03H17/0642

摘要： Data rate conversion devices and methods are provided. A method for converting a first digital signal having a first sampling rate into a second digital signal having a sampling rate close to a predetermined second sampling rate comprises the following operations: when the ratio of the first sampling rate to the second sampling rate is a repeating infinite decimal, calculate at least two calibrating coefficient values and output the calibrating coefficient values according to a predetermined rule; conduct overflow operation on the output calibrating coefficient; and interpolate the first digital signal using the output calibrating coefficient and the result of the overflow operation to obtain the second digital signal such that during any period of a certain length along time axis, sampling times of the second digital signal equals to sampling times of the second sampling rate.

摘要翻译： 提供数据速率转换设备和方法。 一种用于将具有第一采样率的第一数字信号转换成具有接近预定第二采样率的采样率的第二数字信号的方法包括以下操作：当第一采样率与第二采样率的比率是重复的 无限小数，计算至少两个校准系数值，并根据预定规则输出校准系数值; 对输出校准系数进行上溢操作; 并且使用输出校准系数和溢出操作的结果内插第一数字信号以获得第二数字信号，使得在沿着时间轴的一定长度的任何周期期间，第二数字信号的采样时间等于 第二次采样率。

公开(公告)号：US20100098197A1

公开(公告)日：2010-04-22

申请号：US12336108

申请日：2008-12-16

申请人： Yuanfei NIE ,  Gang Hu ,  Meiwu Wu

发明人： Yuanfei NIE ,  Gang Hu ,  Meiwu Wu

IPC分类号： H03D1/04

CPC分类号： H03D1/04 ,  H03D3/002

摘要： A method and system for canceling an interference signal are provided. In the method, a received signal is transformed from a time domain to a frequency domain at relative low precision to obtain an estimated frequency and an estimated amplitude of the interference signal. A reference signal is generated using the estimated frequency and the estimated amplitude. An error signal is generated using the received signal and the reference signal based on minimum correlation criteria. The reference signal is adjusted using the error signal based on an adaptive algorithm. The reference signal is subtracted from the received signal to obtain the useful signal.

摘要翻译： 提供一种用于消除干扰信号的方法和系统。 在该方法中，接收信号以相对低的精度从时域变换到频域，以获得干扰信号的估计频率和估计振幅。 使用估计频率和估计振幅来产生参考信号。 基于最小相关准则，使用接收信号和参考信号产生误差信号。 使用基于自适应算法的误差信号来调整参考信号。 从接收信号中减去参考信号，以获得有用的信号。

公开(公告)号：US20130129023A1

公开(公告)日：2013-05-23

申请号：US13813189

申请日：2011-03-22

申请人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

发明人： Gang Hu ,  Yuanfei Nie ,  Meiwu Wu

IPC分类号： H04L25/02

CPC分类号： H04L25/0242 ,  H04L25/0212 ,  H04L25/0226 ,  H04L25/03299

摘要： A channel estimation method and a channel estimation system based on time-domain training sequence are provided. The channel estimation system first acquires an initial channel vector used for channel estimation of a current frame, and calculates an algorithm initial vector based on a training sequence vector contained in a received receiving signal vector and the receiving signal vector, then performs estimation based on the initial channel vector and the algorithm initial vector and using a conjugate gradient method based on a preprocessing matrix to acquire each channel estimation value, and eventually perform noise reduction processing on each channel estimation value based on a first predetermined threshold value to acquire a final channel estimation value. Compared with the existing channel estimation methods, the present invention has a shorter delay and lower calculation complexity, and thus can be easily implemented.

摘要翻译： 提供了基于时域训练序列的信道估计方法和信道估计系统。 信道估计系统首先获取用于当前帧的信道估计的初始信道向量，并且基于接收到的接收信号向量中包含的训练序列向量和接收信号向量来计算算法初始向量，然后基于 初始信道向量和算法初始向量，并且使用基于预处理矩阵的共轭梯度方法来获取每个信道估计值，并且基于第一预定阈值最终对每个信道估计值执行噪声降低处理以获得最终信道估计 值。 与现有的信道估计方法相比，本发明具有更短的延迟和更低的计算复杂度，因此可以容易地实现。

公开(公告)号：US08385484B2

公开(公告)日：2013-02-26

申请号：US12336108

申请日：2008-12-16

申请人： Yuanfei Nie ,  Gang Hu ,  Meiwu Wu

发明人： Yuanfei Nie ,  Gang Hu ,  Meiwu Wu

IPC分类号： H03D1/04

CPC分类号： H03D1/04 ,  H03D3/002

摘要： A method and system for canceling an interference signal are provided. In the method, a received signal is transformed from a time domain to a frequency domain at relative low precision to obtain an estimated frequency and an estimated amplitude of the interference signal. A reference signal is generated using the estimated frequency and the estimated amplitude. An error signal is generated using the received signal and the reference signal based on minimum correlation criteria. The reference signal is adjusted using the error signal based on an adaptive algorithm. The reference signal is subtracted from the received signal to obtain the useful signal.

摘要翻译： 提供一种用于消除干扰信号的方法和系统。 在该方法中，接收信号以相对低的精度从时域变换到频域，以获得干扰信号的估计频率和估计振幅。 使用估计频率和估计振幅来产生参考信号。 基于最小相关准则，使用接收信号和参考信号产生误差信号。 使用基于自适应算法的误差信号来调整参考信号。 从接收信号中减去参考信号，以获得有用的信号。

公开(公告)号：US08340167B2

公开(公告)日：2012-12-25

申请号：US12544596

申请日：2009-08-20

申请人： Shen Feng ,  Gang Hu ,  Yuanfei Nie ,  Meiwu Wu ,  Yu Chen ,  Xiaomin Si ,  Yiu Leechung

发明人： Shen Feng ,  Gang Hu ,  Yuanfei Nie ,  Meiwu Wu ,  Yu Chen ,  Xiaomin Si ,  Yiu Leechung

IPC分类号： H04B3/46 ,  H04B17/00 ,  H04Q1/20

CPC分类号： H04B17/21

摘要： A method and apparatus for measuring parameters of a receiver having a mixer for generating an I signal and a Q signal using an input signal, an I channel circuit for processing the I signal, and a Q channel circuit for processing the Q signal. The method includes feeding the receiver a first testing signal before the mixer. The method includes feeding the receiver a second testing signal on the I channel circuit. The method includes feeding the receiver a third testing signal on the Q channel circuit. The method includes measuring I/Q quadrature deviation and I/Q delay imbalance of the receiver using the first, the second, and the third testing signals. This separates the I/Q quadrature deviation and I/Q delay imbalance.

摘要翻译： 一种用于测量具有用于使用输入信号产生I信号和Q信号的混合器的接收机的参数的方法和装置，用于处理I信号的I信道电路和用于处理Q信号的Q信道电路。 该方法包括在混合器之前向接收器馈送第一测试信号。 该方法包括在I信道电路上馈送接收机第二测试信号。 该方法包括在Q通道电路上馈送接收器第三测试信号。 该方法包括使用第一，第二和第三测试信号测量接收机的I / Q正交偏差和I / Q延迟不平衡。 这样就分离了I / Q正交偏差和I / Q延迟不平衡。