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：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：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：US07933348B2

公开(公告)日：2011-04-26

申请号：US11882918

申请日：2007-08-07

申请人： Yung-Yih Jian ,  Jen-Yuan Hsu ,  Huei-Jin Lin ,  Pang-An Ting

发明人： Yung-Yih Jian ,  Jen-Yuan Hsu ,  Huei-Jin Lin ,  Pang-An Ting

IPC分类号： H04L27/28

CPC分类号： H04L25/06 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662

摘要： A DC offset estimation system is disclosed. A DC offset estimation system includes a carrier frequency offset estimator receiving an input signal and estimating a carrier frequency offset value, a symbol timing recovery unit providing a symbol boundary of the input signal, and a DC offset estimator estimating a DC offset value to compensate the input signal based on the input signal, the carrier frequency offset value, and the symbol boundary.

摘要翻译： 公开了一种DC偏移估计系统。 DC偏移估计系统包括接收输入信号并估计载波频率偏移值的载波频率偏移估计器，提供输入信号的符号边界的符号定时恢复单元和估计DC偏移值的DC偏移估计器，以补偿 基于输入信号的输入信号，载波频率偏移值和符号边界。

公开(公告)号：US20090041161A1

公开(公告)日：2009-02-12

申请号：US11882918

申请日：2007-08-07

申请人： Yung-Yih Jian ,  Jen-Yuan Hsu ,  Huei-Jin Lin ,  Pang-An Ting

发明人： Yung-Yih Jian ,  Jen-Yuan Hsu ,  Huei-Jin Lin ,  Pang-An Ting

IPC分类号： H04L25/06 ,  H04L1/00

CPC分类号： H04L25/06 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662

摘要： A DC offset estimation system is disclosed. A DC offset estimation system includes a carrier frequency offset estimator receiving an input signal and estimating a carrier frequency offset value, a symbol timing recovery unit providing a symbol boundary of the input signal, and a DC offset estimator estimating a DC offset value to compensate the input signal based on the input signal, the carrier frequency offset value, and the symbol boundary.

摘要翻译： 公开了一种DC偏移估计系统。 DC偏移估计系统包括接收输入信号并估计载波频率偏移值的载波频率偏移估计器，提供输入信号的符号边界的符号定时恢复单元和估计DC偏移值的DC偏移估计器，以补偿 基于输入信号的输入信号，载波频率偏移值和符号边界。