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。

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：US08130879B2

公开(公告)日：2012-03-06

申请号：US12101123

申请日：2008-04-10

Applicant: Fong Ching Huang

Inventor： Fong Ching Huang

IPC: H03D1/04

CPC classification number: H04B3/32

Abstract: An apparatus and method for interference cancellation is provided to cancel the interference such as echo and cross-talk received by a receiver of a communication system. The apparatus includes a digital cancellation signal generator, a first canceller, and a second canceller. The digital cancellation signal generator can generate a digital cancellation signal, which includes a first and a second portion and represents an interference signal within a received signal. The first canceller can perform an analog cancellation on the received signal to output a partially-interference-canceled received signal according to the first portion of the digital cancellation signal. The second canceller can perform a digital cancellation on the partially-interference-canceled received signal according to the second portion of the digital cancellation signal.

Abstract translation: 提供一种用于干扰消除的装置和方法，以消除由通信系统的接收机接收的诸如回声和串扰的干扰。 该装置包括数字消除信号发生器，第一消除器和第二消除器。 数字消除信号发生器可以产生数字消除信号，其包括第一和第二部分，并且表示接收信号内的干扰信号。 第一消除器可以对接收到的信号执行模拟消除，以根据数字消除信号的第一部分输出部分干扰消除的接收信号。 第二消除器可以根据数字消除信号的第二部分对部分干扰消除的接收信号执行数字消除。