公开(公告)号：US06408269B1

公开(公告)日：2002-06-18

申请号：US09261396

申请日：1999-03-03

申请人： Wen-Rong Wu ,  Po-Cheng Chen ,  Hwai-Tsu Chang ,  Chun-Hung Kuo

发明人： Wen-Rong Wu ,  Po-Cheng Chen ,  Hwai-Tsu Chang ,  Chun-Hung Kuo

IPC分类号： G10L2102

CPC分类号： G10L21/0208 ,  G10L21/0232 ,  G10L25/18

摘要： A method and apparatus for enhancing a speech signal contaminated by additive noise through Kalman filtering. The speech is decomposed into subband speech signals by a multichannel analysis filter bank including bandpass filters and decimation filters. Each subband speech signal is converted into a sequence of voice frames. A plurality of low-order Kalman filters are respectively applied to filter each of the subband speech signals. The autoregression (AR) parameters which are required for each Kalman filter are estimated frame-by-frame by using a correlation subtraction method to estimate the autocorrelation function and solving the corresponding Yule-Walker equations for each of the subband speech signals, respectively. The filtered subband speech signals are then combined or synthesized by a multichannel synthesis filter bank including interpolation filters and bandpass filters, and the outputs of the multichannel synthesis filter bank are summed in an adder to produce the enhanced fullband speech signal.

摘要翻译： 一种用于通过卡尔曼滤波增强被加性噪声污染的语音信号的方法和装置。 通过包括带通滤波器和抽取滤波器的多通道分析滤波器组将语音分解成子带语音信号。 每个子带语音信号被转换成一系列语音帧。 分别应用多个低阶卡尔曼滤波器来滤波每个子带语音信号。 通过使用相关减法来估计每个卡尔曼滤波器所需的自回归（AR）参数，以分别估计每个子带语音信号的自相关函数和求解相应的Yule-Walker方程。 滤波后的子带语音信号然后由包括内插滤波器和带通滤波器的多通道合成滤波器组合或合成，并且多路合成滤波器组的输出在加法器中相加以产生增强的全频带语音信号。

公开(公告)号：US06570986B1

公开(公告)日：2003-05-27

申请号：US09385353

申请日：1999-08-30

申请人： Wen-Rong Wu ,  Shih-Chen Lin ,  Po-Cheng Chen ,  Chun-Hung Kuo

发明人： Wen-Rong Wu ,  Shih-Chen Lin ,  Po-Cheng Chen ,  Chun-Hung Kuo

IPC分类号： H04M908

CPC分类号： H04M9/082

摘要： A communication system includes an echo canceller and double-talk detector. The echo canceller includes an adaptive finite impulse response filter that generates an adaptive filter weight vector. The double talk detector computes a squared norm of the filter weight vector and detects an increase of the squared norm in order to detect double-talk status. Upon detection of double-talk status, operation of the echo canceller is suspended.

摘要翻译： 通信系统包括回波消除器和双向通话检测器。 回波消除器包括产生自适应滤波器权重向量的自适应有限脉冲响应滤波器。 双通话检测器计算滤波器权重向量的平方范数，并检测平方范数的增加以便检测双方对话状态。 在检测到双方通话状态时，回波消除器的操作被暂停。

公开(公告)号：US07573954B2

公开(公告)日：2009-08-11

申请号：US11307802

申请日：2006-02-23

申请人： Wen-Rong Wu ,  Guoren Tsai

发明人： Wen-Rong Wu ,  Guoren Tsai

IPC分类号： H04L27/00

CPC分类号： H03D3/009

摘要： An apparatus and method of an OFDM system for compensating IQ imbalance. The apparatus includes a mixer module for mixing a wireless signal to generate a pair of in-phase and quadrature-phase analog signals; an in-phase and quadrature-phase imbalance parameter estimation unit coupled to the mixer module for estimating a gain compensation value and a phase compensation value; and a signal compensation module coupled to the in-phase and quadrature-phase imbalance parameter estimation unit for compensating the pair of in-phase and quadrature-phase analog signals for gain imbalance and phase imbalance, according to the gain compensation value and the phase compensation value respectively.

摘要翻译： 用于补偿IQ不平衡的OFDM系统的装置和方法。 该装置包括混频器模块，用于混合无线信号以产生一对同相和正交相模拟信号; 耦合到混频器模块的同相和正交相位不平衡参数估计单元，用于估计增益补偿值和相位补偿值; 以及耦合到所述同相和正交相位不平衡参数估计单元的信号补偿模块，用于根据所述增益补偿值和相位补偿来补偿所述一对同相和正交相模拟信号中的增益不平衡和相位不平衡 价值。

公开(公告)号：US20090110044A1

公开(公告)日：2009-04-30

申请号：US12107126

申请日：2008-04-22

申请人： Wen-Rong Wu ,  Shiang-Lun Kao

发明人： Wen-Rong Wu ,  Shiang-Lun Kao

IPC分类号： H04L27/01

CPC分类号： H04L25/0212 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/0224

摘要： Method and apparatus for deciding a channel impulse response for an OFDM system are provided. First, a channel frequency response is generated by using a plurality of pilot tones of a signal. A channel impulse response is generated by applying the IFFT to the channel frequency response. A plurality of selected channel taps are derived by comparing a plurality of channel taps related to the channel impulse response with a reference threshold. Finally, the channel impulse response is generated by calculating channel impulse respose according to the selected channel taps. This method calculates the channel impulse response in time domain and frequency domain so that the calculation complexity can be reduced, and the system efficiency can be enhanced.

摘要翻译： 提供了一种用于确定OFDM系统的信道脉冲响应的方法和装置。 首先，通过使用信号的多个导频音来产生频道频率响应。 通过将IFFT应用于信道频率响应来生成信道脉冲响应。 通过将与信道脉冲响应相关的多个信道抽头与参考阈值进行比较来导出多个所选择的信道抽头。 最后，通过根据所选择的信道抽头计算信道脉冲复位来产生信道脉冲响应。 该方法计算时域和频域的信道脉冲响应，从而降低计算复杂度，提高系统效率。

公开(公告)号：US20060215537A1

公开(公告)日：2006-09-28

申请号：US11306804

申请日：2006-01-11

申请人： Wen-Rong Wu ,  Chuntao Lin

发明人： Wen-Rong Wu ,  Chuntao Lin

IPC分类号： H04J11/00

CPC分类号： H04L27/2647 ,  H04L25/022 ,  H04L27/2623 ,  H04L2025/03414

摘要： An apparatus and a method for estimating a clipping parameter of an OFDM system are disclosed. The apparatus includes a clipping error detection module for evaluating a received clipping error; a division module coupled to the clipping error detection module for obtaining a characteristic value according to the received clipping error; and a computation module coupled to the division module for estimating the clipping parameter according to the characteristic value.

摘要翻译： 公开了一种用于估计OFDM系统的限幅参数的装置和方法。 该装置包括用于评估接收到的限幅误差的限幅误差检测模块; 耦合到所述限幅误差检测模块的分割模块，用于根据接收的限幅误差获得特征值; 以及计算模块，其耦合到所述分割模块，用于根据所述特征值估计所述削波参数。

公开(公告)号：US08249204B2

公开(公告)日：2012-08-21

申请号：US12339000

申请日：2008-12-18

申请人： Wen-Rong Wu ,  Tzu-Han Hsu ,  Jen-Yuan Hsu ,  Pang-An Ting

发明人： Wen-Rong Wu ,  Tzu-Han Hsu ,  Jen-Yuan Hsu ,  Pang-An Ting

IPC分类号： H03D1/04

CPC分类号： H04W8/24 ,  H04W24/10

摘要： A method for a mobile station to provide to a base station feedback of channel state information (CSI) regarding a plurality of communication channels between the mobile station and the base station. The method includes: estimating the CSI by calculating a plurality of channel responses each for one of the communication channels; compressing the estimated CSI; and sending the compressed CSI as the feedback to the base station.

摘要翻译： 一种移动台向基站提供关于移动台和基站之间的多个通信信道的信道状态信息（CSI）的反馈的方法。 该方法包括：通过为每个通信信道之一计算多个信道响应来估计CSI; 压缩估计的CSI; 并将压缩的CSI作为反馈发送到基站。

公开(公告)号：US08090058B2

公开(公告)日：2012-01-03

申请号：US12129927

申请日：2008-05-30

申请人： Wen-Rong Wu ,  Jiun-Ying Wu

发明人： Wen-Rong Wu ,  Jiun-Ying Wu

IPC分类号： H04L27/06

CPC分类号： H04L25/03197 ,  H04L25/03229 ,  H04L2025/03388 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A wireless communication receiving system and an apparatus and a method for deciding a transmitted signal corresponding to a received signal thereof are provided. The transmitted signal comprises a plurality of sub-transmitted signals. The system selects at least one of the sub-transmitted signals as a reference signal group, wherein each of a plurality of candidate values of the reference signal group forms a candidate geometric space respectively. The received signal is projected to each of the candidate geometric spaces to generate a projection signal respectively. In each of the candidate geometric space, the corresponding projection signal is quantized to generate a quantized projection signal having a projection distance to the corresponding projection signal. Finally, the transmitted signal is decided according the quantized projection signal and the candidate signal value corresponding to the shortest projection distance.

摘要翻译： 提供一种无线通信接收系统以及用于确定与其接收信号对应的发送信号的装置和方法。 发送信号包括多个子发送信号。 该系统选择至少一个副发送信号作为参考信号组，其中参考信号组的多个候选值中的每一个分别形成候选几何空间。 接收的信号被投影到每个候选几何空间以分别产生投影信号。 在每个候选几何空间中，相应的投影信号被量化以产生具有到相应投影信号的投影距离的量化投影信号。 最后，根据量化投影信号和对应于最短投影距离的候选信号值决定发送信号。

公开(公告)号：US20090110113A1

公开(公告)日：2009-04-30

申请号：US12169295

申请日：2008-07-08

申请人： Wen-Rong Wu ,  Shih-Chi Shen ,  Yu-Cheng Lin

发明人： Wen-Rong Wu ,  Shih-Chi Shen ,  Yu-Cheng Lin

IPC分类号： H04L27/00

CPC分类号： H04L5/0044 ,  H04L1/0052 ,  H04L1/0065 ,  H04L1/0071

摘要： Wireless transmitted system and apparatus and method for encoding a plurality of information bits to a plurality of transmitted signals thereof, and wireless received system and apparatus and method for decoding a received signal to a plurality of information bits thereof are provided. The wireless transmitted system encodes a plurality of information bits to a plurality of transmitted signals by two logic operation modules, an interleaving module, and a combination module. The wireless received system decodes a received signal to a plurality of information bits by a division module, two probability generation modules, two status calculation modules, a signal generation module and a combination module.

摘要翻译： 提供了用于将多个信息比特编码到其多个发送信号的无线传输系统和装置和方法，以及用于将接收信号解码为多个信息比特的无线接收系统和装置和方法。 无线发送系统通过两个逻辑运算模块，交织模块和组合模块将多个信息比特编码为多个发送信号。 无线接收系统通过分割模块，两个概率生成模块，两个状态计算模块，信号生成模块和组合模块将接收到的信号解码为多个信息比特。

公开(公告)号：US20090175392A1

公开(公告)日：2009-07-09

申请号：US11970614

申请日：2008-01-08

申请人： Wen-Rong Wu ,  Ku-How Yang

发明人： Wen-Rong Wu ,  Ku-How Yang

IPC分类号： H04B1/10

CPC分类号： H04L27/2647 ,  H04L25/0204 ,  H04L25/0224 ,  H04L2025/03414

摘要： An apparatus and a method for cancelling an interference of each of a plurality of received signals are provided. The apparatus comprises an estimation module, an ordering module, a selection module, an equalizer, and a cancellation module. The estimation module estimates a plurality of estimated channels according to a first predetermined number of pilot-tones. The ordering module decides a decision order for processing. The selection module selects a second predetermined number of the received signals as the second predetermined number of processing signals. The equalizer estimates the estimated values, wherein each of the estimated values corresponds to a processing signal. The decision module decides a decided value for each of the estimated values. The cancellation module cancels the interference for each of the processing signals according to the corresponding decided value and the corresponding channel. Then, the estimation module further estimates the estimated channels according to the pilot-tones and a plurality of estimated values.

摘要翻译： 提供了用于消除多个接收信号中的每一个的干扰的装置和方法。 该装置包括估计模块，排序模块，选择模块，均衡器和消除模块。 估计模块根据第一预定数量的导频音来估计多个估计信道。 订购模块决定处理决定顺序。 选择模块选择第二预定数量的接收信号作为第二预定数量的处理信号。 均衡器估计估计值，其中每个估计值对应于处理信号。 决定模块决定每个估计值的确定值。 取消模块根据相应的确定值和相应的通道消除每个处理信号的干扰。 然后，估计模块进一步根据导频和多个估计值来估计估计信道。

公开(公告)号：US07978779B2

公开(公告)日：2011-07-12

申请号：US11782528

申请日：2007-07-24

申请人： Wen-Rong Wu ,  Shih-Chi Shen

发明人： Wen-Rong Wu ,  Shih-Chi Shen

IPC分类号： H04B7/02 ,  H04L1/02

CPC分类号： H04L27/2608 ,  H03M13/09 ,  H03M13/4146 ,  H03M13/6362

摘要： A MIMO OFDM system for TICM includes a tone-level interleaver at the transmitter using a block of NT symbols as its basic unit. This results in different decoding architectures at the receiver. The main advantage of TICM is to merge soft-bit demapping into the Viterbi algorithm. Taking advantage of the trellis structure inherent in the Viterbi algorithm, TICM can have lower computational complexity and potentially better performance than BICM with the LSD detector and the vector demapper. Although the tone-level interleaving may not have spatial diversity gain, the performance is not affected in 802.11n environments.

摘要翻译： 用于TICM的MIMO OFDM系统包括使用NT个符号块作为其基本单元的发射机处的音调级交织器。 这导致接收器处的不同解码架构。 TICM的主要优点是将软位解映射合并到维特比算法中。 利用维特比算法固有的网格结构，利用LSD检测器和向量解映射器，TICM可以具有比BICM更低的计算复杂度和潜在的更好的性能。 虽然音调级交织可能没有空间分集增益，但在802.11n环境中性能不受影响。