公开(公告)号：US08442474B2

公开(公告)日：2013-05-14

申请号：US12844961

申请日：2010-07-28

申请人： Yadunandana Rao ,  Charles R. Ruelke ,  Darrell J. Stogner ,  Richard S. Young

发明人： Yadunandana Rao ,  Charles R. Ruelke ,  Darrell J. Stogner ,  Richard S. Young

IPC分类号： H04B1/16

CPC分类号： H04B1/30 ,  H03D3/009 ,  H03D2200/0047 ,  H03D2200/0082 ,  H03G3/3052

摘要： An apparatus and method for demodulating an FM RF signal is presented. An Adaptive Differentiate Cross Multiply (ADCM) system in which the energy estimate of the desired on-channel RF is generated using adaptive filtering. The adaptive filter includes low pass filtering of the instantaneous energy estimate. The bandwidth of the LPF is adjusted in real time based on the received signal strength energy estimate, the periodicity of any changes in the energy estimate, AGC setting for the receiver, and/or the type of sub-audible signaling applied to the RF signal if known. After the bandwidth is set, the optimum filtered energy estimate is applied to the system to demodulate the received information free from distortion artifacts associated with IQ imbalance. A normalized signal in the ADCM system is clipped by a limiter whose clipping threshold is equal to a maximum gain of differentiators in the ADCM system.

摘要翻译： 提出了一种用于解调FM RF信号的装置和方法。 自适应差分交叉乘法（ADCM）系统，其中使用自适应滤波来生成期望的同信道RF的能量估计。 自适应滤波器包括瞬时能量估计的低通滤波。 基于接收到的信号强度能量估计，能量估计的任何变化的周期性，接收机的AGC设置和/或应用于RF信号的子听觉信号的类型，实时地调整LPF的带宽 如果已知。 在设置带宽之后，将最佳滤波能量估计值应用于系统以解调所接收到的信息，而不存在与IQ失衡相关的失真伪像。 ADCM系统中的归一化信号由限幅器限幅，其限幅阈值等于ADCM系统中微分器的最大增益。

公开(公告)号：US20050027494A1

公开(公告)日：2005-02-03

申请号：US10814441

申请日：2004-03-31

申请人： Deniz Erdogmus ,  Jose Principe ,  Yadunandana Rao

发明人： Deniz Erdogmus ,  Jose Principe ,  Yadunandana Rao

IPC分类号： G05B13/04 ,  G06F17/10

CPC分类号： G05B13/042 ,  G05B13/04

摘要： A method of building a model for a physical plant in the presence of noise can include initializing the model of the physical plant, wherein the model is characterized by a parameter vector, estimating an output of the model, and computing a composite cost comprising a weighted average of an error between the estimated output from the model and an actual output of the physical plant, and a derivative of the error. The method further can include determining a step size and a model update direction. The model of the physical plant can be updated. The updating step can be dependent upon the step size. Another embodiment can include the steps of determining a Kalman gain and determining an error vector comprised of two entries weighted by a scalar parameter.

摘要翻译： 在存在噪声的情况下建立物理设备的模型的方法可以包括初始化物理设备的模型，其中模型的特征在于参数向量，估计模型的输出，以及计算复合成本，其包括加权 来自模型的估计输出与物理设备的实际输出之间的误差的平均值以及误差的导数。 该方法还可以包括确定步长和模型更新方向。 物理工厂的模型可以更新。 更新步骤可以取决于步长。 另一个实施例可以包括以下步骤：确定卡尔曼增益并确定包括由标量参数加权的两个条目的误差向量。

公开(公告)号：US20120028594A1

公开(公告)日：2012-02-02

申请号：US12844961

申请日：2010-07-28

申请人： YADUNANDANA RAO ,  CHARLES R. RUELKE ,  DARRELL J. STOGNER ,  RICHARD S. YOUNG

发明人： YADUNANDANA RAO ,  CHARLES R. RUELKE ,  DARRELL J. STOGNER ,  RICHARD S. YOUNG

IPC分类号： H04B1/16

CPC分类号： H04B1/30 ,  H03D3/009 ,  H03D2200/0047 ,  H03D2200/0082 ,  H03G3/3052

摘要： An apparatus and method for demodulating an FM RF signal is presented. An Adaptive Differentiate Cross Multiply (ADCM) system in which the energy estimate of the desired on-channel RF is generated using adaptive filtering. The adaptive filter includes low pass filtering of the instantaneous energy estimate. The bandwidth of the LPF is adjusted in real time based on the received signal strength energy estimate, the periodicity of any changes in the energy estimate, AGC setting for the receiver, and/or the type of sub-audible signaling applied to the RF signal if known. After the bandwidth is set, the optimum filtered energy estimate is applied to the system to demodulate the received information free from distortion artifacts associated with IQ imbalance. A normalized signal in the ADCM system is clipped by a limiter whose clipping threshold is equal to a maximum gain of differentiators in the ADCM system.

摘要翻译： 提出了一种用于解调FM RF信号的装置和方法。 自适应差分交叉乘法（ADCM）系统，其中使用自适应滤波来生成期望的同信道RF的能量估计。 自适应滤波器包括瞬时能量估计的低通滤波。 基于接收到的信号强度能量估计，能量估计的任何变化的周期性，接收机的AGC设置和/或应用于RF信号的子听觉信号的类型，实时地调整LPF的带宽 如果已知。 在设置带宽之后，将最佳滤波能量估计值应用于系统以解调所接收到的信息，而不存在与IQ失衡相关的失真伪像。 ADCM系统中的归一化信号由限幅器限幅，其限幅阈值等于ADCM系统中微分器的最大增益。