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    • 4. 发明授权
    • Reception device, integrated circuit, digital television receiver, reception method, and reception program
    • 接收装置,集成电路,数字电视接收机,接收方式和接收方案
    • US08433010B2
    • 2013-04-30
    • US12670934
    • 2009-06-11
    • Yoshinobu MatsumuraTomohiro Kimura
    • Yoshinobu MatsumuraTomohiro Kimura
    • H04L27/00
    • H04L5/0048H04L25/022H04L25/0232H04L25/0236H04L25/0256H04L2025/03414
    • An orthogonal transform subunit 14 separates a reception signal into carriers on a per-symbol basis. In a channel characteristics estimation subunit 15, (i) an SP channel characteristics estimation part 20 calculates channel characteristics at carriers to which SPs are allocated, by using signals output from the orthogonal transform subunit 14, (ii) a symbol direction interpolation part 30 interpolates, in the symbol (time) direction, signals output from the SP channel characteristics estimation part 20, (iii) a TMCC channel characteristics estimation part 40 calculates channel characteristics at carriers to which TMCCs are allocated, by using signals output from the orthogonal transfer subunit 14, and (iv) an adaptive interpolation part 50 calculates filter coefficients by using signals output from the symbol direction interpolation part 30 and the TMCC channel characteristics estimation part 40, and adaptively interpolates signals output from the symbol direction interpolation part 30 by using values of the calculated filter coefficients.
    • 正交变换子单元14将每个符号的接收信号分离为载波。 在信道特性估计子单元15中,(i)SP信道特性估计部20通过使用从正交变换子单元14输出的信号来计算分配有SP的载波的信道特性,(ii)符号方向插值部30内插 在符号(时间)方向上,从SP信道特性估计部20输出的信号,(iii)TMCC信道特性估计部40通过使用从正交转移子单元输出的信号来计算分配有TMCC的载波的信道特性 如图14所示,(iv)自适应插值部50使用从符号方向内插部30和TMCC信道特性估计部40输出的信号来计算滤波器系数,并且使用从符号方向插值部30输出的信号自适应地内插 计算滤波器系数。
    • 5. 发明申请
    • OFDM RECEPTION DEVICE, OFDM RECEPTION INTEGRATED CIRCUIT, OFDM RECEPTION METHOD, AND OFDM RECEPTION PROGRAM
    • OFDM接收设备,OFDM接收集成电路,OFDM接收方法和OFDM接收程序
    • US20100166126A1
    • 2010-07-01
    • US12438051
    • 2008-01-08
    • Yoshinobu MatsumuraTomohiro Kimura
    • Yoshinobu MatsumuraTomohiro Kimura
    • H04B1/10
    • H04W52/282H04B7/12H04L25/022H04L25/0232H04L25/03159H04L25/03821H04L27/2647H04W52/24
    • An OFDM reception apparatus is provided that effectively suppresses a reduction in reception performance during high-speed mobile reception, thereby making it possible to achieve stable and high-speed mobile reception. To achieve this, the OFDM reception apparatus includes a transmission channel characteristic estimating unit for calculating a transmission channel characteristic value indicating phase and amplitude distortions in an OFDM signal for each sub-carrier, the phase and amplitude distortions occurring during propagation through a transmission channel, and calculating an n-th differentiation of the transmission channel characteristic value, and an interference component removing unit for using the transmission channel characteristic value and the n-th differentiation calculated for each of the sub-carriers by the transmission channel characteristic estimating unit, to remove an interference component between the sub-carriers from the OFDM signal. The transmission channel characteristic estimating unit performs a filtering process in a symbol direction with respect to the transmission channel characteristic value calculated for each of the sub-carriers to perform oversampling at intervals each smaller than a one-symbol interval, and uses transmission channel characteristic values existing in intervals each smaller than a two-symbol interval of the transmission channel characteristic values obtained by the oversampling to calculate the n-th differentiations.
    • 提供了一种OFDM接收装置,其有效地抑制了在高速移动接收期间的接收性能的降低,从而使得可以实现稳定和高速的移动接收。 为了实现这一点,OFDM接收装置包括传输信道特性估计单元,用于计算指示每个子载波的OFDM信号中的相位和幅度失真的传输信道特性值,在通过传输信道传播期间发生的相位和幅度失真, 以及计算传输信道特性值的第n个微分;以及干扰分量去除单元,用于使用由传输信道特性估计单元为每个子载波计算的传输信道特性值和第n个微分, 从OFDM信号中去除子载波之间的干扰分量。 传输信道特性估计单元相对于为每个子载波计算的传输信道特性值在符号方向上执行滤波处理,以小于一符号间隔的间隔执行过采样,并且使用传输信道特性值 存在的间隔小于通过过采样获得的传输信道特征值的两符号间隔,以计算第n个微分。
    • 7. 发明申请
    • RECEPTION DEVICE, INTEGRATED CIRCUIT, DIGITAL TELEVISION RECEIVER, RECEPTION METHOD, AND RECEPTION PROGRAM
    • 接收设备,集成电路,数字电视接收机,接收方式和接收方案
    • US20100309383A1
    • 2010-12-09
    • US12670934
    • 2009-06-11
    • Yoshinobu MatsumuraTomohiro Kimura
    • Yoshinobu MatsumuraTomohiro Kimura
    • H04L27/00H04N5/44
    • H04L5/0048H04L25/022H04L25/0232H04L25/0236H04L25/0256H04L2025/03414
    • An orthogonal transform subunit 14 separates a reception signal into carriers on a per-symbol basis. In a channel characteristics estimation subunit 15, (i) an SP channel characteristics estimation part 20 calculates channel characteristics at carriers to which SPs are allocated, by using signals output from the orthogonal transform subunit 14, (ii) a symbol direction interpolation part 30 interpolates, in the symbol (time) direction, signals output from the SP channel characteristics estimation part 20, (iii) a TMCC channel characteristics estimation part 40 calculates channel characteristics at carriers to which TMCCs are allocated, by using signals output from the orthogonal transfer subunit 14, and (iv) an adaptive interpolation part 50 calculates filter coefficients by using signals output from the symbol direction interpolation part 30 and the TMCC channel characteristics estimation part 40, and adaptively interpolates signals output from the symbol direction interpolation part 30 by using values of the calculated filter coefficients.
    • 正交变换子单元14将每个符号的接收信号分离为载波。 在信道特性估计子单元15中,(i)SP信道特性估计部20通过使用从正交变换子单元14输出的信号来计算分配有SP的载波的信道特性,(ii)符号方向插值部30内插 在符号(时间)方向上,从SP信道特性估计部20输出的信号,(iii)TMCC信道特性估计部40通过使用从正交转移子单元输出的信号来计算分配有TMCC的载波的信道特性 如图14所示,(iv)自适应插值部50使用从符号方向内插部30和TMCC信道特性估计部40输出的信号来计算滤波器系数,并且使用从符号方向插值部30输出的信号自适应地内插 计算滤波器系数。