公开(公告)号：US20110116361A1

公开(公告)日：2011-05-19

申请号：US13013355

申请日：2011-01-25

申请人： Kiyoshi KOBAYASHI ,  Masazumi Ueba

发明人： Kiyoshi KOBAYASHI ,  Masazumi Ueba

IPC分类号： H04L29/06

CPC分类号： H04L27/2628

摘要： A digital signal demultiplexing apparatus that can demultiplex and a digital signal multiplexing apparatus that can multiplex signals of channels having arbitrary frequency intervals and bandwidths are provided. The digital signal demultiplexing apparatus performs discrete Fourier transform on an input signal, output samples existing within frequency bands of each channel from samples of the frequency domain, add samples such that the number of samples of each channel become a power of two, and performs, on the samples of each channel, discrete inverse Fourier transform of a length the same as the number of the samples. The digital signal multiplexing apparatus performs discrete Fourier transform of a length the same as the number of samples of an input signal for a predetermined period, outputs samples existing within frequency bands of each channel from samples of the frequency domain of each channel, and arrange the samples according to frequency assignment of each channel to perform discrete inverse Fourier transform.

摘要翻译： 提供了能够进行解复用的数字信号解复用装置和能够复用具有任意频率间隔和带宽的信道的信号的数字信号复用装置。 数字信号解复用装置对输入信号进行离散傅里叶变换，从频域的采样中输出存在于每个信道的频带内的样本，添加样本，使得每个信道的样本数变为2的幂， 在每个通道的样本上，离散傅里叶逆变换的长度与样本数量相同。 数字信号复用装置执行与预定周期的输入信号的样本数相同的长度的离散傅里叶变换，从每个通道的频域的采样中输出存在于每个通道的频带内的样本，并且将 根据每个通道的频率分配进行离散傅里叶逆变换。

公开(公告)号：US20100045553A1

公开(公告)日：2010-02-25

申请号：US11969762

申请日：2008-01-04

申请人： Masataka Ohira ,  Wuqiong Luo ,  Makoto Taroumaru ,  Amane Miura ,  Shigeru Saito ,  Masazumi Ueba ,  Takashi Ohira

发明人： Masataka Ohira ,  Wuqiong Luo ,  Makoto Taroumaru ,  Amane Miura ,  Shigeru Saito ,  Masazumi Ueba ,  Takashi Ohira

IPC分类号： H01Q9/04 ,  H01Q9/00

CPC分类号： H01Q9/42 ,  H01Q21/061 ,  H01Q21/205

摘要： A low-profile antenna structure can control its directivity with great flexibility. Excited elements 11 and 12 are symmetrically arranged on a y-axis, whereas parasitic elements 13 and 14 are symmetrically arranged on an x-axis, with respect to an origin. The excited elements, as well as the parasitic elements, each have an inverted-F antenna structure and are a distance of λ/4 apart from each other. Feed circuits 21 and 22 are respectively connected to and feed signals to the excited elements 11 and 12, such that phases of the signals to be fed are different from each other by a desired degree. Variable reactors 23 and 24 (i) are respectively connected to the parasitic elements 13 and 14, and (ii) in accordance with reactance values thereof, can each change an electrical length of the corresponding one of the parasitic elements.

摘要翻译： 低调的天线结构可以灵活地控制其方向性。 激励元件11和12对称地布置在y轴上，而寄生元件13和14相对于原点对称地布置在x轴上。 激励元件以及寄生元件各自具有倒F型天线结构，并且彼此间隔为λ/ 4。 馈电电路21和22分别连接到激励元件11和12并将信号馈送到激励元件11和12，使得要被馈送的信号的相位彼此不同所需的程度。 可变电抗器23和24（i）分别连接到寄生元件13和14，并且（ii）根据其电抗值可以各自改变相应的一个寄生元件的电长度。

公开(公告)号：US08611204B2

公开(公告)日：2013-12-17

申请号：US13013355

申请日：2011-01-25

申请人： Kiyoshi Kobayashi ,  Masazumi Ueba

发明人： Kiyoshi Kobayashi ,  Masazumi Ueba

IPC分类号： H04J11/00

CPC分类号： H04L27/2628

摘要： A digital signal demultiplexing apparatus that can demultiplex and a digital signal multiplexing apparatus that can multiplex signals of channels having arbitrary frequency intervals and bandwidths are provided. The digital signal demultiplexing apparatus performs discrete Fourier transform on an input signal, output samples existing within frequency bands of each channel from samples of the frequency domain, add samples such that the number of samples of each channel become a power of two, and performs, on the samples of each channel, discrete inverse Fourier transform of a length the same as the number of the samples. The digital signal multiplexing apparatus performs discrete Fourier transform of a length the same as the number of samples of an input signal for a predetermined period, outputs samples existing within frequency bands of each channel from samples of the frequency domain of each channel, and arrange the samples according to frequency assignment of each channel to perform discrete inverse Fourier transform.

摘要翻译： 提供了能够进行解复用的数字信号解复用装置和能够复用具有任意频率间隔和带宽的信道的信号的数字信号复用装置。 数字信号解复用装置对输入信号进行离散傅里叶变换，从频域的采样中输出存在于每个信道的频带内的样本，添加样本，使得每个信道的样本数变为2的幂， 在每个通道的样本上，离散傅里叶逆变换的长度与样本数相同。 数字信号复用装置执行与预定周期的输入信号的样本数相同的长度的离散傅里叶变换，从每个通道的频域的采样中输出存在于每个通道的频带内的样本，并且将 根据每个通道的频率分配进行离散傅里叶逆变换。

公开(公告)号：US08036100B2

公开(公告)日：2011-10-11

申请号：US12441981

申请日：2007-10-23

申请人： Kiyoshi Kobayashi ,  Masazumi Ueba

发明人： Kiyoshi Kobayashi ,  Masazumi Ueba

IPC分类号： H04J11/00

CPC分类号： H04L27/2628

摘要： A digital signal demultiplexing apparatus that can demultiplex and a digital signal multiplexing apparatus that can multiplex signals of channels having arbitrary frequency intervals and bandwidths are provided. The digital signal demultiplexing apparatus performs discrete Fourier transform on an input signal, output samples existing within frequency bands of each channel from samples of the frequency domain, add samples such that the number of samples of each channel become a power of two, and performs, on the samples of each channel, discrete inverse Fourier transform of a length the same as the number of the samples. The digital signal multiplexing apparatus performs discrete Fourier transform of a length the same as the number of samples of an input signal for a predetermined period, outputs samples existing within frequency bands of each channel from samples of the frequency domain of each channel, and arrange the samples according to frequency assignment of each channel to perform discrete inverse Fourier transform.

摘要翻译： 提供了能够进行解复用的数字信号解复用装置和能够复用具有任意频率间隔和带宽的信道的信号的数字信号复用装置。 数字信号解复用装置对输入信号进行离散傅里叶变换，从频域的采样中输出存在于每个信道的频带内的样本，添加样本，使得每个信道的样本数变为2的幂， 在每个通道的样本上，离散傅里叶逆变换的长度与样本数相同。 数字信号复用装置执行与预定时间段的输入信号的样本数相同的长度的离散傅立叶变换，从每个通道的频域的采样中输出存在于每个通道的频带内的样本，并且将 根据每个通道的频率分配进行离散傅里叶逆变换。

公开(公告)号：US07956815B2

公开(公告)日：2011-06-07

申请号：US11969762

申请日：2008-01-04

申请人： Masataka Ohira ,  Wuqiong Luo ,  Makoto Taroumaru ,  Amane Miura ,  Shigeru Saito ,  Masazumi Ueba ,  Takashi Ohira

发明人： Masataka Ohira ,  Wuqiong Luo ,  Makoto Taroumaru ,  Amane Miura ,  Shigeru Saito ,  Masazumi Ueba ,  Takashi Ohira

IPC分类号： H01Q9/04 ,  H01Q9/00

CPC分类号： H01Q9/42 ,  H01Q21/061 ,  H01Q21/205

摘要： A low-profile antenna structure can control its directivity with great flexibility. Excited elements 11 and 12 are symmetrically arranged on a y-axis, whereas parasitic elements 13 and 14 are symmetrically arranged on an x-axis, with respect to an origin. The excited elements, as well as the parasitic elements, each have an inverted-F antenna structure and are a distance of λ/4 apart from each other. Feed circuits 21 and 22 are respectively connected to and feed signals to the excited elements 11 and 12, such that phases of the signals to be fed are different from each other by a desired degree. Variable reactors 23 and 24 (i) are respectively connected to the parasitic elements 13 and 14, and (ii) in accordance with reactance values thereof, can each change an electrical length of the corresponding one of the parasitic elements.

摘要翻译： 低调的天线结构可以灵活地控制其方向性。 激励元件11和12对称地布置在y轴上，而寄生元件13和14相对于原点对称地布置在x轴上。 激励元件以及寄生元件各自具有倒F型天线结构，并且彼此间隔为λ/ 4。 馈电电路21和22分别连接到激励元件11和12并将信号馈送到激励元件11和12，使得要被馈送的信号的相位彼此不同所需的程度。 可变电抗器23和24（i）分别连接到寄生元件13和14，并且（ii）根据其电抗值可以各自改变相应的一个寄生元件的电长度。

公开(公告)号：US20090262758A1

公开(公告)日：2009-10-22

申请号：US12441981

申请日：2007-10-23

申请人： Kiyoshi Kobayashi ,  Masazumi Ueba

发明人： Kiyoshi Kobayashi ,  Masazumi Ueba

IPC分类号： H04J1/00

CPC分类号： H04L27/2628

摘要： A digital signal demultiplexing apparatus that can demultiplex and a digital signal multiplexing apparatus that can multiplex signals of channels having arbitrary frequency intervals and bandwidths are provided. The digital signal demultiplexing apparatus performs discrete Fourier transform on an input signal, output samples existing within frequency bands of each channel from samples of the frequency domain, add samples such that the number of samples of each channel become a power of two, and performs, on the samples of each channel, discrete inverse Fourier transform of a length the same as the number of the samples. The digital signal multiplexing apparatus performs discrete Fourier transform of a length the same as the number of samples of an input signal for a predetermined period, outputs samples existing within frequency bands of each channel from samples of the frequency domain of each channel, and arrange the samples according to frequency assignment of each channel to perform discrete inverse Fourier transform.

摘要翻译： 提供了能够进行解复用的数字信号解复用装置和能够复用具有任意频率间隔和带宽的信道的信号的数字信号复用装置。 数字信号解复用装置对输入信号进行离散傅里叶变换，从频域的采样中输出存在于每个信道的频带内的样本，添加样本，使得每个信道的样本数变为2的幂， 在每个通道的样本上，离散傅里叶逆变换的长度与样本数相同。 数字信号复用装置执行与预定周期的输入信号的样本数相同的长度的离散傅里叶变换，从每个通道的频域的采样中输出存在于每个通道的频带内的样本，并且将 根据每个通道的频率分配进行离散傅里叶逆变换。