公开(公告)号：US20090164542A1

公开(公告)日：2009-06-25

申请号：US12331404

申请日：2008-12-09

申请人： Wei-De Wu ,  Shin-Yuan Wang

发明人： Wei-De Wu ,  Shin-Yuan Wang

IPC分类号： G06F17/10 ,  G06F17/14

CPC分类号： H04B1/7097 ,  H03H17/0216 ,  H03H2017/0072

摘要： A method for calculating coefficients of a filter and a method for filtering are provided. The invention directly factorizes a specific function in a cepstrum domain by spectral factorization and cepstrum technique to obtain coefficients of denominator function from the filter. In other words, the invention adopts a non-iterative algorithm to reduce computational complexity and avoid convergence due to calculating coefficients. Besides, the specific function of the invention includes a compensation function, so that a Fourier transform with greatly reduced size can be utilized in the spectral factorization to greatly save the computations and keep good system performance at a receiver.

摘要翻译： 提供了一种用于计算滤波器的系数的方法和滤波方法。 本发明通过谱分解和倒谱技术直接对倒频谱域中的特定功能进行分解，以从滤波器获得分母函数的系数。 换句话说，本发明采用非迭代算法来减少计算复杂度并避免由于计算系数而导致的收敛。 此外，本发明的具体功能包括补偿功能，使得可以在频谱分解中利用具有大大减小的傅里叶变换，以大大节省计算并在接收机上保持良好的系统性能。

公开(公告)号：US08341202B2

公开(公告)日：2012-12-25

申请号：US12331404

申请日：2008-12-09

申请人： Wei-De Wu ,  Shin-Yuan Wang

发明人： Wei-De Wu ,  Shin-Yuan Wang

IPC分类号： G06F17/10 ,  G06F17/14

CPC分类号： H04B1/7097 ,  H03H17/0216 ,  H03H2017/0072

摘要： A method for calculating coefficients of a filter and a method for filtering are provided. The invention directly factorizes a specific function in a cepstrum domain by spectral factorization and cepstrum technique to obtain coefficients of denominator function from the filter. In other words, the invention adopts a non-iterative algorithm to reduce computational complexity and avoid convergence due to calculating coefficients. Besides, the specific function of the invention includes a compensation function, so that a Fourier transform with greatly reduced size can be utilized in the spectral factorization to greatly save the computations and keep good system performance at a receiver.

摘要翻译： 提供了一种用于计算滤波器的系数的方法和滤波方法。 本发明通过谱分解和倒谱技术直接对倒频谱域中的特定功能进行分解，以从滤波器获得分母函数的系数。 换句话说，本发明采用非迭代算法来减少计算复杂度并避免由于计算系数而导致的收敛。 此外，本发明的具体功能包括补偿功能，使得可以在频谱分解中利用具有大大减小的傅里叶变换，以大大节省计算并在接收机上保持良好的系统性能。

公开(公告)号：US08588346B2

公开(公告)日：2013-11-19

申请号：US12801165

申请日：2010-05-26

申请人： Kai-Jie Yang ,  Shin-Yuan Wang ,  Weily Kuo

发明人： Kai-Jie Yang ,  Shin-Yuan Wang ,  Weily Kuo

IPC分类号： H04L27/06

CPC分类号： H04L25/0202 ,  H04L25/0222

摘要： A Doppler frequency estimation system includes a basis projector, a polynomial generator and an extreme value determinator. The basis projector receives and projects multiple channel sampling signals to a set of orthogonal bases to thereby generate multiple channel correlation vectors. The polynomial generator is connected to the basis projector in order to produce a target polynomial based on the channel correlation vectors, an estimated channel-envelope-to-noise-plus-interference power-ratio and a channel-envelope power. The extreme value determinator is connected to the polynomial generator in order to determine an extreme value of the polynomial and output a frequency corresponding to the extreme value as an estimated Doppler frequency.

摘要翻译： 多普勒频率估计系统包括基本投影仪，多项式发生器和极值确定器。 基准投影仪将多个通道采样信号接收并投影到一组正交基底，从而生成多个信道相关向量。 多项式发生器连接到基本投影仪，以便基于信道相关向量，估计的信道包络到噪声加干扰功率比和信道包络功率产生目标多项式。 极值确定器连接到多项式发生器，以便确定多项式的极值，并输出与极值对应的频率作为估计的多普勒频率。

公开(公告)号：US08064511B2

公开(公告)日：2011-11-22

申请号：US12135218

申请日：2008-06-09

申请人： Po-Ying Chen ,  Shin-Yuan Wang

发明人： Po-Ying Chen ,  Shin-Yuan Wang

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

CPC分类号： H04L25/0216 ,  H04B1/7113 ,  H04B2201/70707 ,  H04L25/03044 ,  H04L25/03063 ,  H04L2025/03426 ,  H04L2025/03585

摘要： This invention relates to an equalization apparatus, an equalization method and a receiver using the same. Two equalizers are applied to the equalization apparatus to cover two clusters of a channel. The weights of the two equalizers are calculated by channel gains of the whole channel based on the minimum mean square error criterion. Therefore the interference of the whole channel due to different clusters can be reduced enormously.

摘要翻译： 本发明涉及一种均衡装置，均衡方法和使用该均衡装置的接收机。 两个均衡器被应用于均衡装置以覆盖通道的两个簇。 基于最小均方误差准则，通过整个信道的信道增益来计算两个均衡器的权重。 因此，由于不同的集群，整个信道的干扰可以大大降低。

公开(公告)号：US08254511B2

公开(公告)日：2012-08-28

申请号：US12716971

申请日：2010-03-03

申请人： Po-Ying Chen ,  Shin-Yuan Wang

发明人： Po-Ying Chen ,  Shin-Yuan Wang

IPC分类号： H04B1/10

CPC分类号： H04L25/03019 ,  H04L25/0216 ,  H04L25/03292

摘要： This invention relates to an equalization apparatus and an equalization method. A plurality of equalizers is applied to the equalization apparatus to eliminate interferences of multiple clusters in a channel. The weights of the equalizers are calculated under minimum mean square error criterion by gains of delay paths of multiple clusters in the whole channel. Therefore, the interference of different clusters in the whole channel can be greatly eliminated.

摘要翻译： 本发明涉及一种均衡装置和均衡方法。 将多个均衡器应用于均衡装置以消除信道中多个簇的干扰。 通过整个通道中多个簇的延迟路径的增益，在最小均方误差标准下计算均衡器的权重。 因此，可以大大消除整个通道中不同簇的干扰。

公开(公告)号：US20090264088A1

公开(公告)日：2009-10-22

申请号：US12423017

申请日：2009-04-14

申请人： Xiu-Sheng Li ,  Shin-Lin Shieh ,  Shin-Yuan Wang

发明人： Xiu-Sheng Li ,  Shin-Lin Shieh ,  Shin-Yuan Wang

IPC分类号： H04B1/04

CPC分类号： H04B1/1027 ,  H04L1/0054 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/03006

摘要： A method for mitigating interference is provided. First, a received signal having a training sequence is received from a transmitter. Then, a Signal-to-Interference-plus-Noise Ratio (SINR) of the training sequence in the received signal is calculated, and whether a co-channel interference signal exists in the received signal is determined according to the SINR. The signal power corresponding to each time index in the received signal is calculated to detect a beginning time point and an ending time point of the co-channel interference signal. Finally, when the co-channel interference signal in the received signal is detected, the time when an interference cancellation filter is turned on is determined by the beginning time point and the ending time point.

摘要翻译： 提供了减轻干扰的方法。 首先，从发送器接收具有训练序列的接收信号。 然后，计算接收信号中的训练序列的信号与干扰加噪声比（SINR），并根据SINR确定接收信号中是否存在同信道干扰信号。 计算与接收信号中的每个时间索引对应的信号功率，以检测同信道干扰信号的开始时间点和结束时间点。 最后，当检测到接收信号中的同信道干扰信号时，由开始时间点和结束时间点确定干扰消除滤波器导通的时间。

公开(公告)号：US20100303177A1

公开(公告)日：2010-12-02

申请号：US12801165

申请日：2010-05-26

申请人： Kai-Jie Yang ,  Shin-Yuan Wang ,  Weily Kuo

发明人： Kai-Jie Yang ,  Shin-Yuan Wang ,  Weily Kuo

IPC分类号： H04L27/00

CPC分类号： H04L25/0202 ,  H04L25/0222

摘要： A Doppler frequency estimation system includes a basis projector, a polynomial generator and an extreme value determinator. The basis projector receives and projects multiple channel sampling signals to a set of orthogonal bases to thereby generate multiple channel correlation vectors. The polynomial generator is connected to the basis projector in order to produce a target polynomial based on the channel correlation vectors, an estimated channel-envelope-to-noise-plus-interference power-ratio and a channel-envelope power. The extreme value determinator is connected to the polynomial generator in order to determine an extreme value of the polynomial and output a frequency corresponding to the extreme value as an estimated Doppler frequency.

摘要翻译： 多普勒频率估计系统包括基本投影仪，多项式发生器和极值确定器。 基准投影仪将多个通道采样信号接收并投影到一组正交基底，从而生成多个信道相关向量。 多项式发生器连接到基本投影仪，以便基于信道相关向量，估计的信道包络到噪声加干扰功率比和信道包络功率产生目标多项式。 极值确定器连接到多项式发生器，以便确定多项式的极值，并输出与极值对应的频率作为估计的多普勒频率。

公开(公告)号：US06376269B1

公开(公告)日：2002-04-23

申请号：US09243184

申请日：1999-02-02

申请人： Yong Chen ,  Shin-Yuan Wang

发明人： Yong Chen ,  Shin-Yuan Wang

IPC分类号： H01L2100

CPC分类号： H01S5/18341 ,  H01S5/18305 ,  H01S5/18308 ,  H01S5/1833 ,  H01S5/18369 ,  H01S5/2063 ,  H01S5/2216 ,  H01S5/222 ,  H01S5/32341 ,  H01S2301/163 ,  H01S2301/166 ,  H01S2304/12

摘要： A current confinement region located proximate to a pair of Bragg reflectors in a semiconductor laser and an epitaxial lateral overgrowth layer grown through an aperture in the current confinement region allows a desirable current flow in the laser. The placement of the current confinement region having an aperture formed therein allows the desired current flow through an active layer of the laser. This current flow allows the laser to achieve a single spatial mode output. Furthermore, the ability to place a pair of Bragg reflectors in close proximity to each other achieves a short optical cavity resulting in a single longitudinal mode output. Together, the single spatial mode and single longitudinal mode result in a desired single frequency output. The single frequency output is particularly useful for high speed, high rate optical and telecommunications.

摘要翻译： 位于半导体激光器中的一对布拉格反射器附近的电流限制区域和通过电流限制区域中的孔径生长的外延横向过生长层允许激光器中期望的电流流动。 具有其中形成的孔的电流限制区域的放置允许期望的电流流过激光器的有源层。 该电流允许激光器实现单个空间模式输出。 此外，将一对布拉格反射器彼此靠近的能力实现了短的光学腔，从而产生单个纵向模式输出。 一起，单个空间模式和单个纵向模式产生期望的单个频率输出。 单频输出对于高速，高速光学和电信特别有用。

公开(公告)号：US06266361B1

公开(公告)日：2001-07-24

申请号：US09120497

申请日：1998-07-21

申请人： Chia-Chi Huang ,  Shin-Yuan Wang ,  Yuh-Maiw Jong

发明人： Chia-Chi Huang ,  Shin-Yuan Wang ,  Yuh-Maiw Jong

IPC分类号： A61F206

CPC分类号： H04B1/7075 ,  H04L2027/0046 ,  H04L2027/0065 ,  H04L2027/0067

摘要： A method and an architecture for correcting carrier frequency offset and spreading code timing offset in a direct sequence spread spectrum communication system are disclosed. In the present invention, the carrier frequency offset is divided into an integer part and a fractional part, wherein the integer part is defined as integer multiples of the reciprocal of the period of a spreading code. The integer part of the carrier frequency offset can be obtained by matching received signals with a spreading code whose central frequency is located at integer multiples of the reciprocal of the period of the spreading code and searching the one, of the matched results, with the largest amplitude. Besides, a direction flag can be obtained by comparing the amplitude of the searched one with that of the matched results neighboring the searched one. After correcting the integer part carrier frequency offset, the difference between the phase angles of two successive matched results can be calculated and used to calculate the fractional part of the carrier frequency offset according to the direction sag. After the carrier frequency offset is corrected, the correction of the timing offset of the spreading code can be made by searching for the first path of the channel impulse response which produces the minimum delay spread.

摘要翻译： 公开了一种在直接序列扩频通信系统中校正载波频率偏移和扩展码定时偏移的方法和架构。 在本发明中，载波频率偏移被分为整数部分和小数部分，其中整数部分被定义为扩展码的周期的​​倒数的整数倍。 载波频率偏移的整数部分可以通过将接收信号与中心频率位于扩展码的周期的​​倒数的整数倍的扩展码进行匹配来获得，并且搜索匹配结果中的最大值 振幅。 此外，可以通过将搜索到的幅度与搜索到的匹配结果的幅度进行比较来获得方向标志。 在校正整数部分载波频率偏移之后，可以计算两个连续匹配结果的相位角之间的差异，并用于根据方向下垂计算载波频率偏移的小数部分。 在校正载波频率偏移之后，可以通过搜索产生最小延迟扩展的信道脉冲响应的第一路径来进行扩展码的定时偏移的校正。

公开(公告)号：US08078131B2

公开(公告)日：2011-12-13

申请号：US12423017

申请日：2009-04-14

申请人： Xiu-Sheng Li ,  Shin-Lin Shieh ,  Shin-Yuan Wang

发明人： Xiu-Sheng Li ,  Shin-Lin Shieh ,  Shin-Yuan Wang

IPC分类号： H04B1/10

CPC分类号： H04B1/1027 ,  H04L1/0054 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/03006

摘要： A method for mitigating interference is provided. First, a received signal having a training sequence is received from a transmitter. Then, a Signal-to-Interference-plus-Noise Ratio (SINR) of the training sequence in the received signal is calculated, and whether a co-channel interference signal exists in the received signal is determined according to the SINR. The signal power corresponding to each time index in the received signal is calculated to detect a beginning time point and an ending time point of the co-channel interference signal. Finally, when the co-channel interference signal in the received signal is detected, the time when an interference cancellation filter is turned on is determined by the beginning time point and the ending time point.

摘要翻译： 提供了减轻干扰的方法。 首先，从发送器接收具有训练序列的接收信号。 然后，计算接收信号中的训练序列的信号与干扰加噪声比（SINR），并根据SINR确定接收信号中是否存在同信道干扰信号。 计算与接收信号中的每个时间索引对应的信号功率，以检测同信道干扰信号的开始时间点和结束时间点。 最后，当检测到接收信号中的同信道干扰信号时，由开始时间点和结束时间点确定干扰消除滤波器导通的时间。