专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20080232513A1 APPARATUS AND METHOD FOR PREAMBLE DETECTION AND INTEGER CARRIER FREQUENCY OFFSET ESTIMATION 有权
标题翻译：预先检测和整体载波频偏估计的装置和方法
公开(公告)号：US20080232513A1
公开(公告)日：2008-09-25
申请号：US12044120
申请日：2008-03-07
申请人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , Hiroyuki Hayashi
发明人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , Hiroyuki Hayashi
IPC分类号： H04L27/06 , H03D1/00
CPC分类号： H04L27/2675 , H04L27/2659
摘要： This invention provides an apparatus and method for preamble detection and integer carrier frequency offset estimation, which method comprises the steps of: determining the window of useful subcarriers in preamble transformed to frequency domain based on pre-determined possible integer carrier frequency offset and the length of the preamble, so as to select the useful subcarriers; extracting a plurality of subcarrier sequences having a length equal to that of the preamble from the useful subcarriers; calculating conjugative multiplications of each subcarrier and its neighboring subcarriers in the subcarrier sequences extracted; acquiring the real part of the conjugative multiplications; calculating the cross correlations between the real part of the conjugative multiplications and known preambles modulated by DBPSK, and outputting the calculated correlation values; and detecting preamble index of a target base station with the calculated correlation values to select a target cell, and estimating integer carrier frequency offset with respect to the target base station.
摘要翻译：本发明提供了一种用于前导码检测和整数载波频偏估计的装置和方法，该方法包括以下步骤：基于预定可能的整数载波频率偏移量确定前导码转换到频域的有用子载波的窗口，前导码，以便选择有用的子载波; 从有用的子载波中提取长度等于前导码长度的多个子载波序列; 计算提取的子载波序列中每个子载波及其相邻子载波的共轭乘法; 获取共轭乘法的实部; 计算共轭乘法的实部与由DBPSK调制的已知前同步之间的互相关，并输出所计算的相关值; 以及使用所计算的相关值检测目标基站的前导码索引，以选择目标小区，并且针对目标基站估计整数载波频率偏移。

2. 发明授权

US08040922B2 Apparatus and method of frame synchronization in broad band wireless communication systems 有权
标题翻译：宽带无线通信系统中帧同步的装置和方法
公开(公告)号：US08040922B2
公开(公告)日：2011-10-18
申请号：US12044122
申请日：2008-03-07
申请人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , JianMin Zhou , Hiroyuki Hayashi
发明人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , JianMin Zhou , Hiroyuki Hayashi
IPC分类号： H04J3/06
CPC分类号： H04L27/2656 , H04L27/2676
摘要： The present invention relates to an apparatus and method of frame synchronization in broad band wireless communication systems. In an apparatus of frame synchronization in a mobile station, a time variant phase rotation compensator eliminates time variant phase rotation carried in received signals by conjugated multiplication between adjacent signal samples. Then, the processed signal is fed into a delay correlator to calculate a plurality of correlations between two successive frames. A local power calculator acquires an average power of several symbols centered on delayed correlation values. A normalizer normalizes the delayed correlation values with a local average power corresponding to the delayed correlation values. A maximum value detector selects the maximum value from normalized correlation values to trigger frame synchronizing and timing signals.
摘要翻译：本发明涉及宽带无线通信系统中帧同步的装置和方法。在移动台中的帧同步装置中，时变相位旋转补偿器通过相邻信号样本之间的共轭乘法来消除接收信号中携带的时变相位旋转。然后，将经处理的信号馈送到延迟相关器中以计算两个连续帧之间的多个相关性。局部功率计算器以延迟相关值为中心获取几个符号的平均功率。归一化器用对应于延迟相关值的局部平均功率来对延迟的相关值进行归一化。最大值检测器从归一化相关值中选择最大值以触发帧同步和定时信号。

3. 发明申请

US20080259904A1 APPARATUS AND METHOD OF FRAME SYNCHRONIZATION IN BROAD BAND WIRELESS COMMUNICATION SYSTEMS 有权
标题翻译：宽带无线通信系统中帧同步的装置与方法
公开(公告)号：US20080259904A1
公开(公告)日：2008-10-23
申请号：US12044122
申请日：2008-03-07
申请人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , JianMin Zhou , Hiroyuki Hayashi
发明人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , JianMin Zhou , Hiroyuki Hayashi
IPC分类号： H04J3/06
CPC分类号： H04L27/2656 , H04L27/2676
摘要： The present invention relates to an apparatus and method of frame synchronization in broad band wireless communication systems. In an apparatus of frame synchronization in a mobile station, a time variant phase rotation compensator eliminates time variant phase rotation carried in received signals by conjugated multiplication between adjacent signal samples. Then, the processed signal is fed into a delay correlator to calculate a plurality of correlations between two successive frames. A local power calculator acquires an average power of several symbols centered on delayed correlation values. A normalizer normalizes the delayed correlation values with a local average power corresponding to the delayed correlation values. A maximum value detector selects the maximum value from normalized correlation values to trigger frame synchronizing and timing signals.
摘要翻译：本发明涉及宽带无线通信系统中帧同步的装置和方法。在移动台中的帧同步装置中，时变相位旋转补偿器通过相邻信号样本之间的共轭乘法来消除接收信号中携带的时变相位旋转。然后，将经处理的信号馈送到延迟相关器中以计算两个连续帧之间的多个相关性。局部功率计算器以延迟相关值为中心获取几个符号的平均功率。归一化器用对应于延迟相关值的局部平均功率来对延迟的相关值进行归一化。最大值检测器从归一化相关值中选择最大值以触发帧同步和定时信号。

4. 发明授权

US07995680B2 Apparatus and method for preamble detection and integer carrier frequency offset estimation 有权
标题翻译：用于前导码检测和整数载波频偏估计的装置和方法
公开(公告)号：US07995680B2
公开(公告)日：2011-08-09
申请号：US12044120
申请日：2008-03-07
申请人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , Hiroyuki Hayashi
发明人： Xin Wang , Yuuta Nakaya , Syuusaku Suzuki , Michiharu Nakamura , Hiroyuki Hayashi
IPC分类号： H04L27/06
CPC分类号： H04L27/2675 , H04L27/2659
摘要： This invention provides an apparatus and method for preamble detection and integer carrier frequency offset estimation, which method comprises the steps of: determining the window of useful subcarriers in preamble transformed to frequency domain based on pre-determined possible integer carrier frequency offset and the length of the preamble, so as to select the useful subcarriers; extracting a plurality of subcarrier sequences having a length equal to that of the preamble from the useful subcarriers; calculating conjugative multiplications of each subcarrier and its neighboring subcarriers in the subcarrier sequences extracted; acquiring the real part of the conjugative multiplications; calculating the cross correlations between the real part of the conjugative multiplications and known preambles modulated by DBPSK, and outputting the calculated correlation values; and detecting preamble index of a target base station with the calculated correlation values to select a target cell, and estimating integer carrier frequency offset with respect to the target base station.
摘要翻译：本发明提供了一种用于前导码检测和整数载波频偏估计的装置和方法，该方法包括以下步骤：基于预定可能的整数载波频率偏移量确定前导码转换到频域的有用子载波的窗口，前导码，以便选择有用的子载波; 从有用的子载波中提取长度等于前导码长度的多个子载波序列; 计算提取的子载波序列中每个子载波及其相邻子载波的共轭乘法; 获取共轭乘法的实部; 计算共轭乘法的实部与由DBPSK调制的已知前同步之间的互相关，并输出所计算的相关值; 以及用所计算的相关值检测目标基站的前导码索引，以选择目标小区，并估计相对于目标基站的整数载波频率偏移。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式