公开(公告)号：US20070115799A1

公开(公告)日：2007-05-24

申请号：US11327217

申请日：2006-01-05

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

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

IPC分类号： H04J11/00

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

摘要： 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.

摘要翻译： 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：US07486655B2

公开(公告)日：2009-02-03

申请号：US11327217

申请日：2006-01-05

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

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

IPC分类号： H04J1/00

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

摘要： 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.

摘要翻译： 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：US20110164568A1

公开(公告)日：2011-07-07

申请号：US13049424

申请日：2011-03-16

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

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

IPC分类号： H04W48/16

CPC分类号： H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

摘要： 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.

摘要翻译： 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：US08116806B2

公开(公告)日：2012-02-14

申请号：US13049424

申请日：2011-03-16

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

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

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

CPC分类号： H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

摘要： 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.

摘要翻译： 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

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

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

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

CPC分类号： H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： H04L7/04

CPC分类号： H04L27/2675 ,  H04L27/2659

摘要： 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.

摘要翻译： 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：US20080310525A1

公开(公告)日：2008-12-18

申请号：US11812046

申请日：2007-06-14

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

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

IPC分类号： H04L27/28

CPC分类号： H04L27/2655 ,  H04J11/0069 ,  H04L27/2666

摘要： 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.

摘要翻译： 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：US20080260085A1

公开(公告)日：2008-10-23

申请号：US11808207

申请日：2007-06-07

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

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

IPC分类号： H04L7/04

CPC分类号： H04L27/2675 ,  H04L27/2659

摘要： 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.

摘要翻译： 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：US20130028167A1

公开(公告)日：2013-01-31

申请号：US13309458

申请日：2011-12-01

申请人： Chao-Kai Wen ,  Jung-Chieh Chen ,  Jing-Yu Chen ,  Jiun-Yo Lai ,  Pang-An Ting

发明人： Chao-Kai Wen ,  Jung-Chieh Chen ,  Jing-Yu Chen ,  Jiun-Yo Lai ,  Pang-An Ting

IPC分类号： H04B7/14 ,  H04W72/04 ,  H04W40/00

CPC分类号： H04W52/241 ,  H04B7/155 ,  H04W40/06 ,  H04W40/08 ,  H04W40/24 ,  H04W52/46 ,  H04W72/0473 ,  Y02D70/322 ,  Y02D70/324 ,  Y02D70/446

摘要： A multiple-hop multi-input multi-output (MIMO) amplify-and-forward relay wireless communication system includes a signal source node, a signal destination node and a plurality of relay nodes, wirelessly coupled between the signal source node and the signal destination node. The relay nodes feed back a plurality of signal to noise ratio information and a plurality of antenna number information to the signal source node. The signal source node allocates a plurality of corresponding transmission powers for the relay nodes and sends to the relay nodes.

摘要翻译： 多跳多输入多输出（MIMO）放大和转发中继无线通信系统包括信号源节点，信号目的地节点和多个中继节点，无线地耦合在信号源节点和信号目的地之间 节点。 中继节点向信号源节点反馈多个信噪比信息和多个天线号信息。 信号源节点为中继节点分配多个相应的发送功率，并发送给中继节点。

公开(公告)号：US08059753B2

公开(公告)日：2011-11-15

申请号：US11798762

申请日：2007-05-16

申请人： Yu-Tao Hsieh ,  Chao-Kai Wen ,  Jia-Hao Wu ,  Pang-An Ting

发明人： Yu-Tao Hsieh ,  Chao-Kai Wen ,  Jia-Hao Wu ,  Pang-An Ting

IPC分类号： H03K9/00 ,  H04L27/00 ,  H04L27/28

CPC分类号： H04L25/022 ,  H04L25/0222 ,  H04L25/0228 ,  H04L25/0232 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03547

摘要： An adaptive channel estimator for estimating channel frequency responses when receiving OFDM symbols. The adaptive channel estimator comprises a channel estimator and a channel tracking module. The channel estimator generates one first channel frequency response for each OFDM symbol when operated in the first mode, and generates the channel frequency responses of a second channel frequency response for every N-th OFDM symbols when operated in the second mode, wherein N is a constant integer exceeding one and j is a non-negative integer. The channel tracking module indicates a channel status, and controls the channel estimator to operate in a first mode or a second mode according to the channel status.

摘要翻译： 一种自适应信道估计器，用于在接收OFDM符号时估计信道频率响应。 自适应信道估计器包括信道估计器和信道跟踪模块。 当在第一模式下操作时，信道估计器为每个OFDM符号生成一个第一信道频率响应，并且在第二模式下操作时，为每个第N个OFDM符号产生第二信道频率响应的信道频率响应，其中N是 超过1的常数整数，j是非负整数。 信道跟踪模块指示信道状态，并且根据信道状态控制信道估计器在第一模式或第二模式中操作。