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21.发明申请公开(公告)号：US20070147527A1
公开(公告)日：2007-06-28
申请号：US11641726
申请日：2006-12-20
IPC分类号： H04K1/10
CPC分类号： H04L5/0048 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L27/2613 , H04L2025/03426
摘要： A transmitting method of OFDM signal includes allocating first and second channel estimation preamble signals for channel response estimation respectively to +kth and −kth subcarriers from center frequency of first OFDM signal, allocating first and second pilot signals for residual phase offset estimation respectively to +kth and −kth subcarriers from center frequency of second OFDM signal, transmitting first and second OFDM signals respectively in different time zones using at least one antenna, where, first product of complex conjugate of first channel estimation preamble signal and second pilot signal is equal to second product of second channel estimation preamble signal and complex conjugate of first pilot signal.
摘要翻译： OFDM信号的发送方法包括从第一OFDM信号的中心频率向第k个和第k个子载波分别分配用于信道响应估计的第一和第二信道估计前导信号，分别将残差相位偏移估计的第一和第二导频信号分配到第k个 并且使用至少一个天线分别在不同的时间区域中发射第一和第二OFDM信号，其中，第一信道估计前导信号和第二导频信号的复共轭的第一乘积等于第二个OFDM信号 第二信道估计前导信号的乘积和第一导频信号的复共轭。
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22.发明授权公开(公告)号：US07643567B2
公开(公告)日：2010-01-05
申请号：US11641726
申请日：2006-12-20
CPC分类号： H04L5/0048 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L27/2613 , H04L2025/03426
摘要： A transmitting method of OFDM signal includes allocating first and second channel estimation preamble signals for channel response estimation respectively to +kth and −kth subcarriers from center frequency of first OFDM signal, allocating first and second pilot signals for residual phase offset estimation respectively to +kth and −kth subcarriers from center frequency of second OFDM signal, transmitting first and second OFDM signals respectively in different time zones using at least one antenna, where, first product of complex conjugate of first channel estimation preamble signal and second pilot signal is equal to second product of second channel estimation preamble signal and complex conjugate of first pilot signal.
摘要翻译： OFDM信号的发送方法包括从第一OFDM信号的中心频率向第k个和第k个子载波分别分配用于信道响应估计的第一和第二信道估计前导信号，分别将残差相位偏移估计的第一和第二导频信号分配到第k个 并且使用至少一个天线分别在不同的时间区域中发射第一和第二OFDM信号，其中，第一信道估计前导信号和第二导频信号的复共轭的第一乘积等于第二个OFDM信号 第二信道估计前导信号的乘积和第一导频信号的复共轭。
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23.发明授权Wireless communication method using OFDM and OFDM transmitter and receiver thereof 有权使用OFDM和OFDM发射机的无线通信方法及其接收机公开(公告)号：US07626921B2
公开(公告)日：2009-12-01
申请号：US11669478
申请日：2007-01-31
申请人： Yoshimasa Egashira , Yasuhiko Tanabe , Kazumi Sato
发明人： Yoshimasa Egashira , Yasuhiko Tanabe , Kazumi Sato
IPC分类号： H04J11/00
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/03159 , H04L2025/03414 , H04L2027/0016 , H04L2027/0024
摘要： A wireless communication method includes generating and transmitting an OFDM signal containing a first OFDM symbol possessing a first transmitting pilot signal and a second transmitting pilot signal respectively allocated to a first subcarrier and a second subcarrier being symmetric with respect to a center frequency on a frequency axis, and a second OFDM symbol possessing a third transmitting pilot signal and a fourth transmitting pilot signal respectively allocated to the first subcarrier and the second subcarrier, wherein a difference between a product of a first transmitting pilot signal and a complex conjugate of a fourth transmitting pilot signal and a product of a third transmitting pilot signal and a complex conjugate of a second transmitting pilot signal is non-zero.
摘要翻译： 一种无线通信方法，包括生成和发送包含分别分配给第一子载波的第一OFDM符号的第一OFDM符号和相对于频率轴上的中心频率对称的第二副载波的OFDM信号 以及分别分配给第一子载波和第二副载波的第三发送导频信号和第四发送导频信号的第二OFDM符号，其中，第一发射导频信号与第四发射导频的复共轭的乘积之差 信号和第三发射导频信号与第二发射导频信号的复共轭的乘积不为零。
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公开(公告)号：US20080279292A1
公开(公告)日：2008-11-13
申请号：US12052012
申请日：2008-03-20
申请人： Yasuhiko TANABE , Yoshimasa Egashira , Kazumi Sato
发明人： Yasuhiko TANABE , Yoshimasa Egashira , Kazumi Sato
IPC分类号： H04L27/28
CPC分类号： H04L27/261 , H04L5/0051 , H04L25/022 , H04L25/0226
摘要： The wireless transmission apparatus generates one or a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols for channel estimation, each OFDM symbol including plural subcarriers and having a known signal sequence of known signals which are linearly independent between adjacent subcarriers, and transmits the OFDM symbols.
摘要翻译： 无线发送装置生成用于信道估计的一个或多个正交频分复用（OFDM）符号，每个OFDM符号包括多个子载波，并且具有在相邻子载波之间是线性独立的已知信号的已知信号序列，并且发送OFDM符号 。
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25.发明申请Wireless communication method using OFDM, OFDM receiving method and apparatus thereof 有权使用OFDM的无线通信方法，OFDM接收方法及其装置公开(公告)号：US20080037410A1
公开(公告)日：2008-02-14
申请号：US11824028
申请日：2007-06-29
IPC分类号： H04J11/00
CPC分类号： H04L27/2647 , H04L5/0007 , H04L5/0048 , H04L27/261
摘要： A receiving method receiving an OFDM signal including a first OFDM symbol having first and second pilot signals allocated to first and second subcarriers positioned symmetric on the frequency axis, and a second OFDM symbol having third and fourth pilot signals allocated to the first and the second subcarriers, a difference between a product of the first pilot signal and a complex conjugate of the fourth pilot signal and a product of the third pilot signal and a complex conjugate of the second pilot signal being non-zero, estimating a first coefficient representing a change components of an amplitude and a phase, and a second coefficient representing an interference component, using first and second received pilot signals corresponding to the first and third pilot signals, estimating from the first and second coefficients IQ imbalance, and compensating the influence of amplitude and phase errors in accordance with the IQ imbalance.
摘要翻译： 一种接收OFDM信号的接收方法，包括具有分配给频率轴上对称的第一和第二子载波的第一和第二导频信号的第一OFDM符号，以及分配给第一和第二子载波的第三和第四导频信号的第二OFDM符号 ，第一导频信号的乘积与第四导频信号的复共轭与第三导频信号的乘积与第二导频信号的复共轭之间的差为零，估计表示变化分量的第一系数 使用表示干扰分量的第二系数，使用与第一和第三导频信号对应的第一和第二接收导频信号，从第一和第二系数IQ不平衡估计，并补偿振幅和相位的影响 按照IQ失调的误差。
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公开(公告)号：US07957480B2
公开(公告)日：2011-06-07
申请号：US12140613
申请日：2008-06-17
CPC分类号： H04L27/3863 , H04L5/0051 , H04L27/2613 , H04L27/2647
摘要： A wireless communication apparatus generates transmission signal including first and second pilot signal sequences allocated to first and second frequencies symmetrically located in relation to a center frequency, and third and fourth pilot signal sequences allocated to third and fourth frequencies symmetrically located in relation to the center frequency, quadrature-modulates the transmission signal, to obtain a quadrature modulation signal, quadrature-demodulates the quadrature modulation signal, to obtain a reception signal, extracts first to fourth pilot signal sequences from the reception signal, estimates a first transfer characteristic concerning first and second frequency by using first and second pilot signal sequences, estimates a second transfer characteristic concerning third and fourth frequencies using third and the fourth pilot signal sequences, generates a third transfer characteristic from which an influence of transmission IQ imbalance is removed by using first and second transfer characteristic, and estimates, from the third transfer characteristic, reception IQ imbalance characteristic.
摘要翻译： 无线通信装置产生发送信号，该发送信号包括分配给关于中心频率对称地定位的第一和第二频率的第一和第二导频信号序列，以及分配给相对于中心频率对称地定位的第三和第四频率的第三和第四导频信号序列 对发送信号进行正交调制，得到正交调制信号，对正交调制信号进行正交解调，得到接收信号，从接收信号中提取第一至第四导频信号序列，估计第一和第二传输特性 通过使用第一和第二导频信号序列来估计使用第三和第四导频信号序列的关于第三和第四频率的第二传输特性，产生第三传输特性，通过使用第一和第二导频信号来消除传输IQ不平衡的影响 cond传递特性，并从第三传递特性估计接收IQ不平衡特性。
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公开(公告)号：US07885360B2
公开(公告)日：2011-02-08
申请号：US11961269
申请日：2007-12-20
IPC分类号： H04L27/00
CPC分类号： H04L27/3863
摘要： A wireless communication apparatus receives an quadrature modulated signal, generate a local signal having a frequency different from a center frequency of the quadrature modulated signal, performs quadrature demodulation on the quadrature modulated signal by using the local signal, to obtain an I channel signal and a Q channel signal, performs Fourier transform on the I channel signal and the Q channel signal, to obtain signals in a frequency domain, and calculates a first correction coefficient for correcting phase distortion and amplitude distortion caused by the quadrature demodulation by using pairs of signals among the signals, each of the pairs are located at symmetrical frequency positions with respect to the frequency of the local signal.
摘要翻译： 无线通信装置接收正交调制信号，生成具有与正交调制信号的中心频率不同的频率的本地信号，通过使用本地信号对正交调制信号进行正交解调，得到I信道信号和 Q信道信号，对I信道信号和Q信道信号进行傅里叶变换，以获得频域中的信号，并且计算用于校正由正交解调引起的相位失真和幅度失真的第一校正系数， 信号中的每一对都相对于本地信号的频率位于对称的频率位置。
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公开(公告)号：US20080159442A1
公开(公告)日：2008-07-03
申请号：US11961269
申请日：2007-12-20
IPC分类号： H04L27/22
CPC分类号： H04L27/3863
摘要： A wireless communication apparatus receives an quadrature modulated signal, generate a local signal having a frequency different from a center frequency of the quadrature modulated signal, performs quadrature demodulation on the quadrature modulated signal by using the local signal, to obtain an I channel signal and a Q channel signal, performs Fourier transform on the I channel signal and the Q channel signal, to obtain signals in a frequency domain, and calculates a first correction coefficient for correcting phase distortion and amplitude distortion caused by the quadrature demodulation by using pairs of signals among the signals, each of the pairs are located at symmetrical frequency positions with respect to the frequency of the local signal.
摘要翻译： 无线通信装置接收正交调制信号，生成具有与正交调制信号的中心频率不同的频率的本地信号，通过使用本地信号对正交调制信号进行正交解调，得到I信道信号和 Q信道信号，对I信道信号和Q信道信号进行傅里叶变换，以获得频域中的信号，并且计算用于校正由正交解调引起的相位失真和幅度失真的第一校正系数， 信号中的每一对都相对于本地信号的频率位于对称的频率位置。
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公开(公告)号：US20080310534A1
公开(公告)日：2008-12-18
申请号：US12140613
申请日：2008-06-17
IPC分类号： H04L27/28
CPC分类号： H04L27/3863 , H04L5/0051 , H04L27/2613 , H04L27/2647
摘要： A wireless communication apparatus generates transmission signal including first and second pilot signal sequences allocated to first and second frequencies symmetrically located in relation to a center frequency, and third and fourth pilot signal sequences allocated to third and fourth frequencies symmetrically located in relation to the center frequency, quadrature-modulates the transmission signal, to obtain a quadrature modulation signal, quadrature-demodulates the quadrature modulation signal, to obtain a reception signal, extracts first to fourth pilot signal sequences from the reception signal, estimates a first transfer characteristic concerning first and second frequency by using first and second pilot signal sequences, estimates a second transfer characteristic concerning third and fourth frequencies using third and the fourth pilot signal sequences, generates a third transfer characteristic from which an influence of transmission IQ imbalance is removed by using first and second transfer characteristic, and estimates, from the third transfer characteristic, reception IQ imbalance characteristic.
摘要翻译： 无线通信装置产生发送信号，该发送信号包括分配给相对于中心频率对称地定位的第一和第二频率的第一和第二导频信号序列，以及分配给相对于中心频率对称地定位的第三和第四频率的第三和第四导频信号序列 对发送信号进行正交调制，得到正交调制信号，对正交调制信号进行正交解调，得到接收信号，从接收信号中提取第一至第四导频信号序列，估计第一和第二传输特性 通过使用第一和第二导频信号序列来估计使用第三和第四导频信号序列的关于第三和第四频率的第二传输特性，产生第三传输特性，通过使用第一和第二导频信号来消除传输IQ不平衡的影响 cond传递特性，并从第三传递特性估计接收IQ不平衡特性。
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