公开(公告)号：US07321550B2

公开(公告)日：2008-01-22

申请号：US10778087

申请日：2004-02-17

申请人： Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

发明人： Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

IPC分类号： H04J11/00

CPC分类号： H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

摘要： An equalization method suitable for use in a receiver in an orthogonal frequency division multiplexing (OFDM) system utilizing a plurality of sub-carriers. The receiver includes an outer receiver for decoding. The equalization method includes receiving an input signal including at least one preamble symbol containing a training sequence and a plurality of informative OFDM symbols each containing a serial stream of samples, and performing compensations for each of the informative OFDM symbols. Compensation for each of the informative OFDM symbols includes converting the serial stream of samples into parallel samples, performing a fast Fourier transform (FFT) of the parallel samples to obtain a plurality of data symbols, each data symbol corresponding to a sub-carrier, compensating the data symbols for at least one first phase distortion and at least one second phase distortion, and providing at least one amplitude distortion factor to the outer receiver.

摘要翻译： 一种适用于使用多个子载波的正交频分复用（OFDM）系统中的接收机中的均衡方法。 接收机包括用于解码的外部接收机。 所述均衡方法包括：接收包括包含训练序列的至少一个前导码符号的输入信号和包含串行串流样本的多个信息OFDM符号，以及对每个信息OFDM符号执行补偿。 每个信息OFDM符号的补偿包括将样本的串行流转换为并行采样，执行并行采样的快速傅里叶变换（FFT）以获得多个数据符号，每个数据符号对应于子载波，补偿 所述数据符号用于至少一个第一相位失真和至少一个第二相位失真，并且向所述外部接收器提供至少一个幅度失真因子。

公开(公告)号：US20050180461A1

公开(公告)日：2005-08-18

申请号：US10778087

申请日：2004-02-17

申请人： Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

发明人： Yung-An Kao ,  Chang-Lung Hsiao ,  Po-Lin Chiu ,  Shih-Kai Lee

IPC分类号： H04J11/00 ,  H04L25/03

CPC分类号： H04L25/03159 ,  H04L2025/03414 ,  H04L2025/03522

摘要： An equalization method suitable for use in a receiver in an orthogonal frequency division multiplexing (OFDM) system utilizing a plurality of sub-carriers. The receiver includes an outer receiver for decoding. The equalization method includes receiving an input signal including at least one preamble symbol containing a training sequence and a plurality of informative OFDM symbols each containing a serial stream of samples, and performing compensations for each of the informative OFDM symbols. Compensation for each of the informative OFDM symbols includes converting the serial stream of samples into parallel samples, performing a fast Fourier transform (FFT) of the parallel samples to obtain a plurality of data symbols, each data symbol corresponding to a sub-carrier, compensating the data symbols for at least one first phase distortion and at least one second phase distortion, and providing at least one amplitude distortion factor to the outer receiver.

摘要翻译： 一种适用于使用多个子载波的正交频分复用（OFDM）系统中的接收机中的均衡方法。 接收机包括用于解码的外部接收机。 所述均衡方法包括：接收包括包含训练序列的至少一个前导码符号的输入信号和包含串行串流样本的多个信息OFDM符号，以及对每个信息OFDM符号执行补偿。 每个信息OFDM符号的补偿包括将样本的串行流转换为并行采样，执行并行采样的快速傅里叶变换（FFT）以获得多个数据符号，每个数据符号对应于子载波，补偿 所述数据符号用于至少一个第一相位失真和至少一个第二相位失真，并且向所述外部接收器提供至少一个幅度失真因子。

公开(公告)号：US07043424B2

公开(公告)日：2006-05-09

申请号：US10158883

申请日：2002-06-03

申请人： Jau-Hung Chen ,  Yung-An Kao

发明人： Jau-Hung Chen ,  Yung-An Kao

IPC分类号： G10L11/04

CPC分类号： G10L25/90

摘要： A method of pitch mark determination for a speech includes the following steps. First, a fundamental frequency and fundamental frequency passband signals are acquired by using an adaptable filter. Then, a number of passing zero positions of the fundamental frequency passband signals are detected. After that, at least a candidate set of pitch marks from a number of passing zero positions are generated. Lastly, the candidate set of pitch marks is estimated to generate the best set of pitch marks.

摘要翻译： 用于语音的音高标记确定的方法包括以下步骤。 首先，通过使用适应滤波器来获取基频和基频通带信号。 然后，检测基频通带信号的多个通过零位置。 之后，生成来自多个通过零位置的至少一个候补组间距标记。 最后，估计候选组间距标记产生最好的一组音高标记。