公开(公告)号：US07253762B2

公开(公告)日：2007-08-07

申请号：US11279556

申请日：2006-04-12

Applicant: Fong-Ching Huang ,  Chao-Cheng Lee

Inventor： Fong-Ching Huang ,  Chao-Cheng Lee

IPC: H03M1/12

CPC classification number: H03M1/1019 ,  H03M1/1215

Abstract: The present invention provides an apparatus and a method for estimating at least one of timing, gain, and offset errors of a time-interleaved ADC. The apparatus has a first ADC, a second ADC, a converter, an estimator, and a compensator. The converter has a Fourier Transform converter and a calculator.

Abstract translation: 本发明提供一种用于估计时间交织ADC的定时，增益和偏移误差中的至少一个的装置和方法。 该装置具有第一ADC，第二ADC，转换器，估计器和补偿器。 转换器具有傅立叶变换转换器和计算器。

公开(公告)号：US08325794B2

公开(公告)日：2012-12-04

申请号：US11532101

申请日：2006-09-15

Applicant: Ying-Yao Lin ,  Fong-Ching Huang

Inventor： Ying-Yao Lin ,  Fong-Ching Huang

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC classification number: H03D3/009 ,  H03D2200/0029

Abstract: An apparatus and a method for calibrating IQ mismatch to ensure that an in-phase oscillating signal and a quadrature-phase oscillating signal are orthogonal to each other. The apparatus includes a mixer for mixing the in-phase oscillating signal with the quadrature-phase oscillating signal to generate an output signal, a control module for determining a control signal according to a low-frequency component of the output signal, and a phase adjusting module for adjusting the phase of a specific oscillating signal to ensure that the in-phase oscillating signal and the quadrature-phase oscillating signal are orthogonal to each other. The specific oscillating signal may be the in-phase or the quadrature-phase oscillating signal. The apparatus does not require a digital signal-processing unit to perform complex calculations nor requires additional oscillating sources for calibration. Hence, the circuit design is much simplified, and the consumption of system resources is significantly reduced.

Abstract translation: 用于校准IQ失配以确保同相振荡信号和正交相位振荡信号彼此正交的装置和方法。 该装置包括：混合器，用于将同步振荡信号与正交振荡信号混频以产生输出信号;控制模块，用于根据输出信号的低频分量确定控制信号;以及相位调整 模块，用于调整特定振荡信号的相位，以确保同相振荡信号和正交振荡信号彼此正交。 特定振荡信号可以是同相或正交相位振荡信号。 该装置不需要数字信号处理单元执行复杂的计算，也不需要额外的振荡源进行校准。 因此，电路设计大大简化，系统资源的消耗明显减少。

公开(公告)号：US20100311360A1

公开(公告)日：2010-12-09

申请号：US12795642

申请日：2010-06-07

Applicant: Fong-Ching Huang ,  Yuan-Shuo Chang

Inventor： Fong-Ching Huang ,  Yuan-Shuo Chang

IPC: H04B1/04

CPC classification number: H03F1/3241 ,  H03F3/24

Abstract: A transmitter includes a predistortion calculation unit, a transmitting circuit, a receiving circuit, an adjusting unit and a parameter generating and storing unit. The predistortion calculation unit is utilized for pre-distorting an input signal to generate a predistorted input signal according to a specific predistortion parameter. The transmitting circuit is utilized for processing the predistorted input signal to generate an output signal. The receiving circuit is utilized for receiving the output signal to generate a received signal. The adjusting unit is utilized for adjusting the received signal to generate an adjusted signal, where the adjusted signal is substantially equal to the input signal. The parameter generating and storing unit is utilized for generating the specific predistortion parameter, and updating at least one stored predistortion parameter according to the input signal and the adjusted signal.

Abstract translation: 发射机包括预失真计算单元，发射电路，接收电路，调整单元和参数产生和存储单元。 预失真计算单元用于预失真输入信号以根据特定预失真参数产生预失真输入信号。 发送电路用于处理预失真输入信号以产生输出信号。 接收电路用于接收输出信号以产生接收信号。 调整单元用于调整接收信号以产生经调整的信号，其中调整后的信号基本上等于输入信号。 参数产生和存储单元用于产生特定的预失真参数，并根据输入信号和调整后的信号更新至少一个存储的预失真参数。

公开(公告)号：US07277503B2

公开(公告)日：2007-10-02

申请号：US10640034

申请日：2003-08-14

Applicant: Fong-Ching Huang ,  Der-Zheng Liu

Inventor： Fong-Ching Huang ,  Der-Zheng Liu

IPC: H03D3/18

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2679

Abstract: An apparatus and method for synchronizing sampling frequencies of a receiver and a transmitter of a multi-carrier communication system is provided. The receiver includes an estimator for estimating a frequency offset by employing an additional angle rotation of a received signal in frequency domain. The apparatus includes a compensation loop filter for generating a first output in response to a frequency offset compensation, an adder for adding the estimated frequency offset and the first output to generate a second output, and a loop filter for generating frequency offset compensation according to the second output. The method repeatedly applies the apparatus to generate frequency offset compensation, and then feeds it back to an oscillator to compensate the sampling frequency of the receiver. The apparatus and method can also be applied to a communication system with a carrier frequency offset.

Abstract translation: 提供了一种用于同步多载波通信系统的接收机和发射机的采样频率的装置和方法。 接收机包括估计器，用于通过在频域中采用接收信号的附加角度旋转来估计频率偏移。 该装置包括：补偿环路滤波器，用于响应于频率偏移补偿产生第一输出;加法器，用于将估计的频率偏移和第一输出相加以产生第二输出;以及环路滤波器，用于根据 第二输出。 该方法重复应用该装置以产生频偏补偿，然后将其馈送到振荡器以补偿接收机的采样频率。 该装置和方法也可以应用于具有载波频率偏移的通信系统。

公开(公告)号：US20080024338A1

公开(公告)日：2008-01-31

申请号：US11701466

申请日：2007-02-02

Applicant: Fong-Ching Huang ,  Cheng-Chung Hsu

Inventor： Fong-Ching Huang ,  Cheng-Chung Hsu

IPC: H03M1/10

CPC classification number: H03M1/1028 ,  H03M1/1215

Abstract: A calibration device for calibrating an ADC comprising: an error estimator for estimating an error of a digital signal outputted from the ADC, the error estimator includes: a digital filter for filtering the digital signal to generate a filtered signal; and a least-mean-square module for performing a least-mean-square operation according to the filtered signal to generate an estimated error; and an error correction module for correcting the digital signal according to the estimated error.

Abstract translation: 一种用于校准ADC的校准装置，包括：误差估计器，用于估计从ADC输出的数字信号的误差，误差估计器包括：数字滤波器，用于对数字信号进行滤波以产生滤波信号; 以及最小均方块，用于根据滤波信号进行最小均方运算以产生估计误差; 以及用于根据所估计的误差校正数字信号的纠错模块。

公开(公告)号：US20070058754A1

公开(公告)日：2007-03-15

申请号：US11532101

申请日：2006-09-15

Applicant: Ying-Yao Lin ,  Fong-Ching Huang

Inventor： Ying-Yao Lin ,  Fong-Ching Huang

IPC: H04L27/22

CPC classification number: H03D3/009 ,  H03D2200/0029

Abstract: An apparatus and a method for calibrating IQ mismatch to ensure that an in-phase oscillating signal and a quadrature-phase oscillating signal are orthogonal to each other. The apparatus includes a mixer for mixing the in-phase oscillating signal with the quadrature-phase oscillating signal to generate an output signal, a control module for determining a control signal according to a low-frequency component of the output signal, and a phase adjusting module for adjusting the phase of a specific oscillating signal to ensure that the in-phase oscillating signal and the quadrature-phase oscillating signal are orthogonal to each other. The specific oscillating signal may be the in-phase or the quadrature-phase oscillating signal. The apparatus does not require a digital signal-processing unit to perform complex calculations nor requires additional oscillating sources for calibration. Hence, the circuit design is much simplified, and the consumption of system resources is significantly reduced.

Abstract translation: 用于校准IQ失配以确保同相振荡信号和正交相位振荡信号彼此正交的装置和方法。 该装置包括：混合器，用于将同步振荡信号与正交振荡信号混频以产生输出信号;控制模块，用于根据输出信号的低频分量确定控制信号;以及相位调整 模块，用于调整特定振荡信号的相位，以确保同相振荡信号和正交振荡信号彼此正交。 特定振荡信号可以是同相或正交相位振荡信号。 该装置不需要数字信号处理单元执行复杂的计算，也不需要额外的振荡源进行校准。 因此，电路设计大大简化，系统资源的消耗明显减少。

公开(公告)号：US20060232460A1

公开(公告)日：2006-10-19

申请号：US11279556

申请日：2006-04-12

Applicant: Fong-Ching Huang ,  Chao-Cheng Lee

Inventor： Fong-Ching Huang ,  Chao-Cheng Lee

IPC: H03M1/12

CPC classification number: H03M1/1019 ,  H03M1/1215

Abstract: The present invention provides an apparatus and a method for estimating at least one of timing, gain, and offset errors of a time-interleaved ADC. The apparatus has a first ADC, a second ADC, a converter, an estimator, and a compensator. The converter has a Fourier Transform converter and a calculator.

Abstract translation: 本发明提供一种用于估计时间交织ADC的定时，增益和偏移误差中的至少一个的装置和方法。 该装置具有第一ADC，第二ADC，转换器，估计器和补偿器。 转换器具有傅立叶变换转换器和计算器。

公开(公告)号：US08204152B2

公开(公告)日：2012-06-19

申请号：US12107761

申请日：2008-04-22

Applicant: Fong-Ching Huang ,  Chih-Yung Shih

Inventor： Fong-Ching Huang ,  Chih-Yung Shih

IPC: H04L27/00

CPC classification number: H04L7/0029 ,  H04L7/0012 ,  H04L7/0079 ,  H04L25/03044

Abstract: A digitally synchronized receiving device and an associated signal processing method are provided. The digitally synchronized receiving device can receive data transmitted by a transmitter. The transmitter and the receiving device belong to a first clock domain and a second clock domain respectively. The receiving device performs synchronization in a digital manner, so as to deal with the problem of the analog solution in prior arts and the synchronization for interference cancellation.

Abstract translation: 提供了一种数字同步的接收设备和相关的信号处理方法。 数字同步的接收设备可以接收由发射机发送的数据。 发射机和接收设备分别属于第一时钟域和第二时钟域。 接收装置以数字方式执行同步，以便处理现有技术中的模拟解决方案的问题和用于干扰消除的同步。

公开(公告)号：US07482956B2

公开(公告)日：2009-01-27

申请号：US11701466

申请日：2007-02-02

Applicant: Fong-Ching Huang ,  Cheng-Chung Hsu

Inventor： Fong-Ching Huang ,  Cheng-Chung Hsu

IPC: H03M1/12

CPC classification number: H03M1/1028 ,  H03M1/1215

Abstract: A calibration device for calibrating an ADC comprising: an error estimator for estimating an error of a digital signal outputted from the ADC, the error estimator includes: a digital filter for filtering the digital signal to generate a filtered signal; and a least-mean-square module for performing a least-mean-square operation according to the filtered signal to generate an estimated error; and an error correction module for correcting the digital signal according to the estimated error.

Abstract translation: 一种用于校准ADC的校准装置，包括：误差估计器，用于估计从ADC输出的数字信号的误差，误差估计器包括：数字滤波器，用于对数字信号进行滤波以产生滤波信号; 以及最小均方块，用于根据滤波信号进行最小均方运算以产生估计误差; 以及用于根据所估计的误差校正数字信号的纠错模块。

公开(公告)号：US07257155B2

公开(公告)日：2007-08-14

申请号：US10781889

申请日：2004-02-20

Applicant: Fong-Ching Huang

Inventor： Fong-Ching Huang

IPC: H03K5/159 ,  H04K1/10 ,  H04L27/28

CPC classification number: H04L25/03038 ,  H04L2025/03414 ,  H04L2025/03687

Abstract: The present invention provides a method for initialization and stepsize control of a time-domain equalizer (TEQ) in a receiver of a multi-carrier communication system to upgrade the performance of adaptive TEQ algorithms. As to TEQ initialization, the Time-domain Window Mask method generates a modified channel impulse response (CIR) by performing a locate maximum energy algorithm and then applies a time-domain window mask to adjust the modified CIR to obtain an initial value of a target impulse response. Then, a dividing operation is performed on the frequency-domain initial target impulse response and the modified CIR to determine an initial value of the frequency-domain TEQ impulse response. The Head-tail Equalizing method also performs the locate maximum energy algorithm, and the remaining points other than the consecutive points with maximum energy are combined and padded zero to the last few points to generate a modified CIR. The reciprocal of the frequency-domain modified CIR is determined to be an initial value of the frequency-domain TEQ impulse response. The initial value of the frequency-domain target impulse response is determined by multiplying the determined frequency-domain. TEQ impulse response with the frequency-domain of the CIR. The stepsize control method configures the stepsize coefficient as a time-varying coefficient during the whole adapting TEQ algorithm. It is smaller value at an early stage to prevent from divergence and becomes larger at a late adapting stage to prevent from slow convergence.

Abstract translation: 本发明提供了一种用于初始化和逐步控制多载波通信系统的接收机中的时域均衡器（TEQ）的方法，以升级自适应TEQ算法的性能。 对于TEQ初始化，时域窗口掩码方法通过执行定位最大能量算法生成修改的信道脉冲响应（CIR），然后应用时域窗口掩码来调整修改的CIR以获得目标的初始值 脉冲响应。 然后，对频域初始目标脉冲响应和修正的CIR进行分频操作，以确定频域TEQ脉冲响应的初始值。 头尾均衡方法还执行定位最大能量算法，并且除了具有最大能量的连续点之外的其余点被组合并且将零填充到最后几个点以产生修改的CIR。 将频域修改的CIR的倒数确定为频域TEQ脉冲响应的初始值。 通过乘以确定的频域来确定频域目标脉冲响应的初始值。 TEQ脉冲响应与CIR的频域。 在整个适应TEQ算法中，步长控制方法将步长系数配置为时变系数。 早期阶段的价值较小，以防止发散，并且在适应期较晚的时期变大，以防止收敛缓慢。