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    • 2. 发明授权
    • Wireless terminal apparatus, control method for wireless base station and control method for wireless terminal apparatus
    • 无线终端装置,无线基站的控制方法及无线终端装置的控制方法
    • US07660370B2
    • 2010-02-09
    • US11475960
    • 2006-06-28
    • Atsushi HondaYuuta NakayaMichiharu Nakamura
    • Atsushi HondaYuuta NakayaMichiharu Nakamura
    • H04L27/06
    • H04L27/265H04L27/2633
    • The present invention provides a wireless terminal apparatus, including a reception unit for receiving a multi-carrier signal generated by applying an N-point (where N is a natural number) inverse fast Fourier transform (IFFT) to a plurality of sub-carriers to which transmission information for a plurality of wireless terminal apparatuses is allocated; a fast Fourier transform unit for extracting a plurality of the sub-carriers from the multi-carrier signal; a thin-out unit, being placed at the front stage of the fast Fourier transform unit, capable of changing, from the N points, a sampling number of the multi-carrier signals which are digitalized; and a judgment unit for discerning, based on sub-carrier allocation information accompanying the multi-carrier signal, whether or not the sub-carrier of another wireless terminal apparatus overlaps with that of the wireless terminal apparatus itself in the case of changing the sampling number from the N points, and determining a sampling number for the thin-out unit.
    • 本发明提供一种无线终端装置,包括:接收单元,用于接收通过向多个子载波应用N点(其中N为自然数)的快速傅里叶逆变换(IFFT)而生成的多载波信号, 分配用于多个无线终端装置的发送信息; 快速傅立叶变换单元,用于从多载波信号中提取多个子载波; 放置在快速傅里叶变换单元的前级的薄型单元,能够从N点改变数字化的多载波信号的采样数; 以及判断单元,用于基于伴随多载波信号的子载波分配信息,在改变采样数的情况下,确定另一无线终端装置的副载波与无线终端装置本身的副载波是否重叠 从N个点,并确定薄化单元的采样数。
    • 5. 发明申请
    • Wireless terminal apparatus, control method for wireless base station and control method for wireless terminal apparatus
    • 无线终端装置,无线基站的控制方法及无线终端装置的控制方法
    • US20070223603A1
    • 2007-09-27
    • US11475960
    • 2006-06-28
    • Atsushi HondaYuuta NakayaMichiharu Nakamura
    • Atsushi HondaYuuta NakayaMichiharu Nakamura
    • H04K1/10
    • H04L27/265H04L27/2633
    • The present invention provides a wireless terminal apparatus, including a reception unit for receiving a multi-carrier signal generated by applying an N-point (where N is a natural number) inverse fast Fourier transform (IFFT) to a plurality of sub-carriers to which transmission information for a plurality of wireless terminal apparatuses is allocated; a fast Fourier transform unit for extracting a plurality of the sub-carriers from the multi-carrier signal; a thin-out unit, being placed at the front stage of the fast Fourier transform unit, capable of changing, from the N points, a sampling number of the multi-carrier signals which are digitalized; and a judgment unit for discerning, based on sub-carrier allocation information accompanying the multi-carrier signal, whether or not the sub-carrier of another wireless terminal apparatus overlaps with that of the wireless terminal apparatus itself in the case of changing the sampling number from the N points, and determining a sampling number for the thin-out unit.
    • 本发明提供一种无线终端装置,包括:接收单元,用于接收通过向多个子载波应用N点(其中N为自然数)的快速傅里叶逆变换(IFFT)而生成的多载波信号, 分配用于多个无线终端装置的发送信息; 快速傅立叶变换单元,用于从多载波信号中提取多个子载波; 放置在快速傅里叶变换单元的前级的薄型单元,能够从N点改变数字化的多载波信号的采样数; 以及判断单元,用于基于伴随多载波信号的子载波分配信息,在改变采样数的情况下,确定另一无线终端装置的副载波与无线终端装置本身的副载波是否重叠 从N个点,并确定薄化单元的采样数。
    • 6. 发明申请
    • APPARATUS AND METHOD FOR PREAMBLE DETECTION AND INTEGER CARRIER FREQUENCY OFFSET ESTIMATION
    • 预先检测和整体载波频偏估计的装置和方法
    • US20080232513A1
    • 2008-09-25
    • US12044120
    • 2008-03-07
    • Xin WangYuuta NakayaSyuusaku SuzukiMichiharu NakamuraHiroyuki Hayashi
    • Xin WangYuuta NakayaSyuusaku SuzukiMichiharu NakamuraHiroyuki Hayashi
    • H04L27/06H03D1/00
    • H04L27/2675H04L27/2659
    • 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.
    • 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。
    • 7. 发明授权
    • Apparatus and method for preamble detection and integer carrier frequency offset estimation
    • 用于前导码检测和整数载波频偏估计的装置和方法
    • US07995680B2
    • 2011-08-09
    • US12044120
    • 2008-03-07
    • Xin WangYuuta NakayaSyuusaku SuzukiMichiharu NakamuraHiroyuki Hayashi
    • Xin WangYuuta NakayaSyuusaku SuzukiMichiharu NakamuraHiroyuki Hayashi
    • H04L27/06
    • H04L27/2675H04L27/2659
    • 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.
    • 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。
    • 9. 发明申请
    • Communication Systems
    • 通讯系统
    • US20100142436A1
    • 2010-06-10
    • US12649096
    • 2009-12-29
    • Michael John Beems HartYuefeng ZhouDorin ViorelChenxi ZhuMichiharu NakamuraMasahiro WatanabeHiroshi FujitaMakoto Yoshida
    • Michael John Beems HartYuefeng ZhouDorin ViorelChenxi ZhuMichiharu NakamuraMasahiro WatanabeHiroshi FujitaMakoto Yoshida
    • H04B7/14
    • H04W28/16H04B7/15507H04B7/2606H04L5/0007H04L5/0032H04L5/0048H04L25/0226H04L27/2655H04L27/2692H04W48/08H04W84/047
    • A transmission method for use in a multi-hop wireless communication system is provided. The system includes a source apparatus, a destination apparatus and one or more intermediate apparatuses. The system has access to at least one predetermined transmission introduction sequence and also has access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval. Each window occupies a different part of that interval and has a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval. Each said window being assignable for such a transmission interval to at least one of said apparatuses for use in transmission. The method includes, when transmitting a message with a preamble in a particular transmission interval, transmitting the preamble in a first transmission window of that transmission interval. Furthermore, the method includes transmitting the transmission introduction sequence in a second transmission window of that transmission interval other than the first transmission window preferably as control information for use by at least one said intermediate apparatus or the destination apparatus.
    • 提供了一种用于多跳无线通信系统的传输方法。 该系统包括源设备,目的地设备和一个或多个中间设备。 该系统可以访问至少一个预定的传输介绍序列,并且还可以访问用于在离散传输间隔期间分配可用传输频率带宽的时间 - 频率格式,所述格式在这样的间隔内定义多个传输窗口。 每个窗口占据该间隔的不同部分,并且在该间隔的部分内在所述可用传输频率带宽内具有频带配置。 每个所述窗口可分配给用于传输的所述设备中的至少一个的这种传输间隔。 该方法包括:在特定发送间隔中发送具有前导码的消息时,在该发送间隔的第一发送窗口中发送前导码。 此外,该方法包括:在第一传输窗口之外的传输间隔的第二传输窗口中优选地传输传输介绍序列作为至少一个所述中间设备或目的设备使用的控制信息。