公开(公告)号：US08000661B2

公开(公告)日：2011-08-16

申请号：US12198126

申请日：2008-08-26

Applicant: Mao-Ching Chiu ,  Wei-Ping Chuang

Inventor： Mao-Ching Chiu ,  Wei-Ping Chuang

IPC: H04B1/04

CPC classification number: H04L27/368 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3282 ,  H03F2201/3233 ,  H04B17/0085 ,  H04B17/21 ,  H04B2001/0425

Abstract: A communication system comprises a predistorter for distorting an input signal according to at least one parameter to generate a distorted signal, an amplifier for amplifying the distorted signal according to an input-output characteristic to generate an output signal, and a frequency-domain adaptive calibration module for adaptively adjusting the parameter of the predistorter according to a frequency characteristic of the output signal. Because the calibration is performed in the frequency domain, there is no need to precisely estimate the group delay formed by the feedback path. The system complexity is therefore reduced without loss of performance.

Abstract translation: 通信系统包括用于根据至少一个参数使输入信号失真以产生失真信号的预失真器，用于根据输入 - 输出特性放大失真信号以产生输出信号的放大器，以及频域自适应校准 模块，用于根据输出信号的频率特性自适应地调整预失真器的参数。 因为在频域中执行校准，所以不需要精确地估计由反馈路径形成的组延迟。 因此，系统复杂度降低而不会损失性能。

公开(公告)号：US20110164568A1

公开(公告)日：2011-07-07

申请号：US13049424

申请日：2011-03-16

Applicant: Huei-Jin LIN ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

Inventor： Huei-Jin LIN ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

IPC: H04W48/16

CPC classification number: H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

Abstract: An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values by multiplying the subcarrier values by a preamble code. A correlator calculates a plurality of differential correlations in the code-demodulated signal. An IFFT processor IFFT-processes the differential correlations by mapping the differential correlations to subcarriers. A maximum value detector detects a maximum value from the IFFT signal and calculates a timing offset using an IFFT output index having the maximum value.

Abstract translation: 提供了一种在OFDMA无线通信系统中用于小区获取和下行链路同步捕获的装置和方法。 在宽带无线通信系统的SS装置中，前导子载波采集器从FFT信号中提取具有前导码的子载波值。 乘法器通过将子载波值乘以前导码来解码副载波值。 相关器在码解调信号中计算多个差分相关。 IFFT处理器IFFT通过将差分相关映射到子载波来处理差分相关。 最大值检测器从IFFT信号检测最大值，并使用具有最大值的IFFT输出索引来计算定时偏移。

公开(公告)号：US20070115799A1

公开(公告)日：2007-05-24

申请号：US11327217

申请日：2006-01-05

Applicant: Pang-An Ting ,  Chao-Kai Wen ,  Wei-Ping Chuang ,  Jiunn-Tsair Chen

Inventor： Pang-An Ting ,  Chao-Kai Wen ,  Wei-Ping Chuang ,  Jiunn-Tsair Chen

IPC: H04J11/00

CPC classification number: H04L25/0206 ,  H04B7/0417 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2601 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: The present invention provides an antenna-array-based multiple-input multiple-output orthogonal-frequency-division-multiplexing (MIMO-OFDM) system and a pre-coding and feedback method used in the same. The present invention uses QR decompositions of the MIMO channel matrixes to parameterize the channel state information (CSI) of every OFDM frequency band. In addition, the present invention feeds back the information related to θ and φ in the Givens rotation matrixes of the partial frequency bands and then uses an interpolation method to generate θ and φ in the Givens rotation matrixes of all the frequency bands, which further is able to represent the CSI of all the frequency bands. In this way, the present invention has advantages of low complexity and low feedback rate requirement.

Abstract translation: 本发明提供了一种基于天线阵列的多输入多输出正交频分复用（MIMO-OFDM）系统及其中使用的预编码和反馈方法。 本发明使用MIMO信道矩阵的QR分解来参数化每个OFDM频带的信道状态信息（CSI）。 此外，本发明反馈了与部分频带的Givens旋转矩阵中的θ和phi相关的信息，然后使用内插方法来产生所有频带的Givens旋转矩阵中的θ和φi，这进一步是 能够表示所有频段的CSI。 这样，本发明具有复杂度低，反馈率低的优点。

公开(公告)号：US07161534B2

公开(公告)日：2007-01-09

申请号：US10939480

申请日：2004-09-14

Applicant: Jiann-An Tsai ,  Wei Ping Chuang ,  Chun-Chun Kuo ,  Yung-Yih Jian

Inventor： Jiann-An Tsai ,  Wei Ping Chuang ,  Chun-Chun Kuo ,  Yung-Yih Jian

IPC: H01Q3/00 ,  G01S3/16

CPC classification number: H01Q3/2605 ,  G01S3/16

Abstract: A hybrid beamforming apparatus and method are proposed for a communication system. The hybrid beamforming apparatus includes a plurality of antennas, a plurality of FFT, a plurality of hybrid weight-coefficient generators and a plurality of adders. In each of the hybrid weight-coefficient generators, the weight coefficient for each subcarrier is calculated by a time-domain correlation matrix and a cross-correlation vector, which is calculated by a frequency domain signal and a training signal. The hybrid beamforming apparatus and method according to the present invention can enhance immunity for multipath effect with lower system complexity.

Abstract translation: 提出了一种用于通信系统的混合波束成形装置和方法。 混合波束形成装置包括多个天线，多个FFT，多个混合权重系数发生器和多个加法器。 在每个混合权重系数发生器中，通过由频域信号和训练信号计算的时域相关矩阵和互相关矢量来计算每个子载波的权重系数。 根据本发明的混合波束形成装置和方法可以增强具有较低系统复杂度的多径效应的免疫力。

公开(公告)号：US08116806B2

公开(公告)日：2012-02-14

申请号：US13049424

申请日：2011-03-16

Applicant: Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

Inventor： Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

IPC: H04W24/00 ,  H04W4/00 ,  H04M3/00 ,  H04B17/00 ,  H04J3/06

CPC classification number: H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

Abstract: An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values by multiplying the subcarrier values by a preamble code. A correlator calculates a plurality of differential correlations in the code-demodulated signal. An IFFT processor IFFT-processes the differential correlations by mapping the differential correlations to subcarriers. A maximum value detector detects a maximum value from the IFFT signal and calculates a timing offset using an IFFT output index having the maximum value.

Abstract translation: 提供了一种在OFDMA无线通信系统中用于小区获取和下行链路同步捕获的装置和方法。 在宽带无线通信系统的SS装置中，前导子载波采集器从FFT信号中提取具有前导码的子载波值。 乘法器通过将子载波值乘以前导码来解码副载波值。 相关器在码解调信号中计算多个差分相关。 IFFT处理器IFFT通过将差分相关映射到子载波来处理差分相关。 最大值检测器从IFFT信号检测最大值，并使用具有最大值的IFFT输出索引来计算定时偏移。

公开(公告)号：US07933239B2

公开(公告)日：2011-04-26

申请号：US11812046

申请日：2007-06-14

Applicant: Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

Inventor： Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

IPC: H04B7/00 ,  H04B7/208 ,  H04W4/00 ,  H04J1/00 ,  H04J3/06

CPC classification number: H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

Abstract: The invention provides an FFT-size detection method and system and a cell search method and system based on FFT-size detection, and more particularly to a cell search method based on FFT-size detection in cellular system. The cell search method utilizes two frames to correctly detect the actual cell ID. The cell search method uses the first frame to detect the actual FFT size of a received signal. When the FFT size is determined, the cell search method use the second frame to detect the cell ID of a base station outputting the received signal based on the FFT size.

Abstract translation: 本发明提供了一种基于FFT大小检测的FFT大小检测方法和系统以及小区搜索方法和系统，更具体地，涉及一种基于蜂窝系统中的FFT大小检测的小区搜索方法。 小区搜索方法利用两帧来正确地检测实际的小区ID。 小区搜索方法使用第一帧来检测接收信号的实际FFT大小。 当确定FFT大小时，小区搜索方法使用第二帧来基于FFT大小来检测输出接收信号的基站的小区ID。

公开(公告)号：US07894539B2

公开(公告)日：2011-02-22

申请号：US11808207

申请日：2007-06-07

Applicant: Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

Inventor： Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

IPC: H04L7/04

CPC classification number: H04L27/2675 ,  H04L27/2659

Abstract: The method disclosed in the invention comprises setting a plurality of subcarrier position hypotheses for a received preamble according to a plurality of ideal subcarrier positions and the maximum amount of integer carrier frequency offset (ICFO), generating a plurality of preamble pattern hypotheses by retrieving the received preamble according to the subcarrier position hypotheses, calculating the correlation between the preamble pattern hypotheses and a plurality of specified preamble patterns, determining to which sector the received preamble belongs according to a correct preamble pattern, the specified preamble pattern having the highest correlation with the preamble pattern hypotheses, obtaining a correct subcarrier position according to the sector to which the received preamble belongs; and estimating the ICFO by calculating the offset between the correct subcarrier position and the subcarrier position hypothesis of the preamble pattern hypothesis having the highest correlation with the correct preamble pattern.

Abstract translation: 本发明公开的方法包括根据多个理想子载波位置和最大量的整数载波频率偏移（ICFO）设置接收到的前同步码的多个子载波位置假设，通过检索所接收的前导码模式假设来生成多个前导码模式假设 根据子载波位置假设的前导码，计算前导码模式假设与多个指定的前导码模式之间的相关性，根据正确的前导码模式确定接收到的前导码属于哪个扇区，与前导码具有最高相关性的指定前导码模式 模式假设，根据所接收的前置码所属的扇区获得正确的副载波位置; 以及通过计算与正确前导码模式具有最高相关性的前导码模式假设的正确子载波位置与子载波位置假设之间的偏移来估计ICFO。

公开(公告)号：US20100056082A1

公开(公告)日：2010-03-04

申请号：US12198126

申请日：2008-08-26

Applicant: Mao-Ching Chiu ,  Wei-Ping Chuang

Inventor： Mao-Ching Chiu ,  Wei-Ping Chuang

IPC: H04B1/04 ,  H03F1/26

CPC classification number: H04L27/368 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3282 ,  H03F2201/3233 ,  H04B17/0085 ,  H04B17/21 ,  H04B2001/0425

Abstract: A communication system comprises a predistorter for distorting an input signal according to at least one parameter to generate a distorted signal, an amplifier for amplifying the distorted signal according to an input-output characteristic to generate an output signal, and a frequency-domain adaptive calibration module for adaptively adjusting the parameter of the predistorter according to a frequency characteristic of the output signal. Because the calibration is performed in the frequency domain, there is no need to precisely estimate the group delay formed by the feedback path. The system complexity is therefore reduced without loss of performance.

Abstract translation: 通信系统包括用于根据至少一个参数使输入信号失真以产生失真信号的预失真器，用于根据输入 - 输出特性放大失真信号以产生输出信号的放大器，以及频域自适应校准 模块，用于根据输出信号的频率特性自适应地调整预失真器的参数。 因为在频域中执行校准，所以不需要精确地估计由反馈路径形成的组延迟。 因此，系统复杂度降低而不会损失性能。

公开(公告)号：US20080260085A1

公开(公告)日：2008-10-23

申请号：US11808207

申请日：2007-06-07

Applicant: Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

Inventor： Huei-Jin Lin ,  Wei Ping Chuang ,  Jiun-Yo Lai ,  Pang-An Ting

IPC: H04L7/04

CPC classification number: H04L27/2675 ,  H04L27/2659

Abstract: The method disclosed in the invention comprises setting a plurality of subcarrier position hypotheses for a received preamble according to a plurality of ideal subcarrier positions and the maximum amount of integer carrier frequency offset (ICFO), generating a plurality of preamble pattern hypotheses by retrieving the received preamble according to the subcarrier position hypotheses, calculating the correlation between the preamble pattern hypotheses and a plurality of specified preamble patterns, determining to which sector the received preamble belongs according to a correct preamble pattern, the specified preamble pattern having the highest correlation with the preamble pattern hypotheses, obtaining a correct subcarrier position according to the sector to which the received preamble belongs; and estimating the ICFO by calculating the offset between the correct subcarrier position and the subcarrier position hypothesis of the preamble pattern hypothesis having the highest correlation with the correct preamble pattern.

Abstract translation: 本发明公开的方法包括根据多个理想子载波位置和最大量的整数载波频率偏移（ICFO）设置接收到的前同步码的多个子载波位置假设，通过检索所接收的前导码模式假设来生成多个前导码模式假设 根据子载波位置假设的前导码，计算前导码模式假设与多个指定的前导码模式之间的相关性，根据正确的前导码模式确定接收到的前导码属于哪个扇区，与前导码具有最高相关性的指定前导码模式 模式假设，根据所接收的前置码所属的扇区获得正确的副载波位置; 以及通过计算与正确前导码模式具有最高相关性的前导码模式假设的正确子载波位置与子载波位置假设之间的偏移来估计ICFO。

公开(公告)号：US07486655B2

公开(公告)日：2009-02-03

申请号：US11327217

申请日：2006-01-05

Applicant: Pang-An Ting ,  Chao-Kai Wen ,  Wei-Ping Chuang ,  Jiunn-Tsair Chen

Inventor： Pang-An Ting ,  Chao-Kai Wen ,  Wei-Ping Chuang ,  Jiunn-Tsair Chen

IPC: H04J1/00

CPC classification number: H04L25/0206 ,  H04B7/0417 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2601 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: The present invention provides an antenna-array-based multiple-input multiple-output orthogonal-frequency-division-multiplexing (MIMO-OFDM) system and a pre-coding and feedback method used in the same. The present invention uses QR decompositions of the MIMO channel matrixes to parameterize the channel state information (CSI) of every OFDM frequency band. In addition, the present invention feeds back the information related to θ and φ in the Givens rotation matrixes of the partial frequency bands and then uses an interpolation method to generate θ and φ in the Givens rotation matrixes of all the frequency bands, which further is able to represent the CSI of all the frequency bands. In this way, the present invention has advantages of low complexity and low feedback rate requirement.

Abstract translation: 本发明提供了一种基于天线阵列的多输入多输出正交频分复用（MIMO-OFDM）系统及其中使用的预编码和反馈方法。 本发明使用MIMO信道矩阵的QR分解来参数化每个OFDM频带的信道状态信息（CSI）。 此外，本发明反馈了与部分频带的Givens旋转矩阵中的θ和phi相关的信息，然后使用内插方法来产生所有频带的Givens旋转矩阵中的θ和φi，这进一步是 能够表示所有频段的CSI。 这样，本发明具有复杂度低，反馈率低的优点。