公开(公告)号：US07426232B2

公开(公告)日：2008-09-16

申请号：US10352125

申请日：2003-01-28

申请人： Hidehiro Matsuoka ,  Yong Sun

发明人： Hidehiro Matsuoka ,  Yong Sun

IPC分类号： H04B1/00 ,  H04L1/02

CPC分类号： H04B7/082 ,  H04B7/0848 ,  H04L1/06 ,  H04L27/2647

摘要： A received signal selector for a received signal, the received signal including a set of carriers, the received signal selector being configured for use with an antenna system including a plurality of antenna elements. The received signal selector includes a plurality of received signal inputs for receiving signals from the plurality of antenna elements, an interference detector for each of the received signals inputs, coupled to the received signal inputs to receive, from each input, a version of the received signal, and configured to provide an interference output for the set of carriers from each input, a selection controller configured to receive the interference output for each input and having a control output, and a selector coupled to the received signal inputs and responsive to the control output to select one or more of the versions of the received signal for output. The invention provides a simplified technique for mitigating the effects of co-channel interference and severe multipath distortion.

摘要翻译： 接收信号选择器，用于接收信号，所述接收信号包括一组载波，所述接收信号选择器被配置为与包括多个天线元件的天线系统一起使用。 所接收的信号选择器包括多个接收信号输入，用于从多个天线元件接收信号，用于每个接收信号输入的干扰检测器，耦合到所接收的信号输入端，以从每个输入接收所接收的信号的版本 并且被配置为从每个输入提供用于所述一组载波的干扰输出;配置为接收每个输入的干扰输出并具有控制输出的选择控制器，以及耦合到所接收的信号输入并响应于所述控制的选择器 输出以选择一个或多个接收信号的版本以进行输出。 本发明提供了用于减轻同信道干扰和严重多径失真的影响的简化技术。

公开(公告)号：US07289834B2

公开(公告)日：2007-10-30

申请号：US10384602

申请日：2003-03-11

申请人： Yong Sun ,  Hidehiro Matsuoka

发明人： Yong Sun ,  Hidehiro Matsuoka

IPC分类号： H04M1/00

CPC分类号： H04L27/2647 ,  H04B7/0845 ,  H04B7/0848 ,  H04B7/086

摘要： Antenna techniques particularly for orthogonal frequency division multiplexed (OFDM) communications systems. A signal processing system determines weights for an adaptive antenna, the antenna including plural antenna elements each receiving a signal including plural subcarriers. The system includes plural inputs for receiving signals from the antenna elements, a time-to-frequency domain transformer for each input for transforming the signal from each input to a plurality of subcarrier signals, a first weight determiner coupled to the inputs, before the time-to-frequency domain transformer in the signal path, and configured to determine a first set of weights, one for each input, and a second weight determiner coupled to the first weight determiner and configured to determine, from the determination of the first set of weights, at least one second set of weights including a frequency-domain weight for a subcarrier signal derived from each of the inputs.

摘要翻译： 天线技术特别适用于正交频分复用（OFDM）通信系统。 信号处理系统确定自适应天线的权重，天线包括多个天线元件，每个天线元件接收包括多个子载波的信号。 该系统包括用于接收来自天线元件的信号的多个输入端，用于每个输入的时间 - 频域变换器，用于将来自每个输入的信号变换成多个子载波信号，在时间之前耦合到输入的第一权重确定器 并且被配置为确定第一组权重，一个用于每个输入，以及第二权重确定器，耦合到所述第一权重确定器，并且被配置为从所述第一集合的确定中确定所述第一组权重 权重，至少一个第二组权重，包括从每个输入导出的副载波信号的频域权重​​。

公开(公告)号：US07551548B2

公开(公告)日：2009-06-23

申请号：US11387966

申请日：2006-03-24

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

IPC分类号： H04J11/00

CPC分类号： H04L27/2647

摘要： Orthogonal frequency division multiplexing demodulation apparatus includes: antenna to receive signal including holding period including part of period ranging from leading portion of delayed wave of maximum-delay time to trailing portion of preceding wave, unit estimating channel response of signal received by antenna, unit holding, based on channel response, first-signal component contained in holding period, first-signal component including second-signal component which is contained in period of preset length which is included in holding period, unit acquiring filter-bank outputs by subjecting second-signal component to frequency conversion, unit generating replicas for each of filter-bank outputs, based on estimated-channel response, frequency response of each of filter-bank outputs, and candidates for modulation signal corresponding to subcarrier included in each of filter-bank outputs, unit selecting one of replicas which minimizes quantity corresponding to differences between components of each of filter-bank outputs and components of replicas, and unit determining modulation signal based on selected replica.

摘要翻译： 正交频分复用解调装置包括：天线接收信号，包括保持周期，包括从最大延迟时间的延迟波的前导部分到前一个波形的尾部的时间段的一部分，单元估计由天线接收的信号的信道响应，单元保持 基于信道响应，包含在保持周期中的第一信号分量包括包含在保持周期中的预设长度的周期中的第二信号分量的第一信号分量通过对第二信号进行二次信号的单元获取滤波器组输出 基于估计的信道响应，每个滤波器组输出的频率响应以及与每个滤波器组输出中包括的子载波相对应的调制信号的候选，对于每个滤波器组输出的单元生成副本， 选择最小化对应于co之间的差异的数量的复制品之一的单元 滤波器组输出和副本组件中的每一个的组成部分，以及基于选择的副本的单元确定调制信号。

公开(公告)号：US20060285482A1

公开(公告)日：2006-12-21

申请号：US11387966

申请日：2006-03-24

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Makoto Tsuruta

IPC分类号： H04J11/00

CPC分类号： H04L27/2647

摘要： Orthogonal frequency division multiplexing demodulation apparatus includes: antenna to receive signal including holding period including part of period ranging from leading portion of delayed wave of maximum-delay time to trailing portion of preceding wave, unit estimating channel response of signal received by antenna, unit holding, based on channel response, first-signal component contained in holding period, first-signal component including second-signal component which is contained in period of preset length which is included in holding period, unit acquiring filter-bank outputs by subjecting second-signal component to frequency conversion, unit generating replicas for each of filter-bank outputs, based on estimated-channel response, frequency response of each of filter-bank outputs, and candidates for modulation signal corresponding to subcarrier included in each of filter-bank outputs, unit selecting one of replicas which minimizes quantity corresponding to differences between components of each of filter-bank outputs and components of replicas, and unit determining modulation signal based on selected replica.

公开(公告)号：US08503579B2

公开(公告)日：2013-08-06

申请号：US12834189

申请日：2010-07-12

申请人： Tatsuhisa Furukawa ,  Hidehiro Matsuoka

发明人： Tatsuhisa Furukawa ,  Hidehiro Matsuoka

IPC分类号： H04B1/10 ,  H04L27/00

CPC分类号： H04L25/0216 ,  H04L25/0228 ,  H04L27/2607 ,  H04L27/2647

摘要： The channel estimator includes a plurality of correlating sections configured to calculate a plurality of time correlation values between the signal and a plurality of known pattern signals having different code lengths, an analyzing section configured to output a control signal representing a selected period for extracting a preferable correlation output from the output from each of the plurality of correlating sections, and a delay profile generating section configured to output a delay profile obtained by adaptively selecting or combining parts of the outputs from the plurality of correlating sections based on the output from the analyzing section.

摘要翻译： 信道估计器包括多个相关部分，被配置为计算信号与具有不同码长的多个已知模式信号之间的多个时间相关值，分析部分被配置为输出表示选择的周期的控制信号，以提取优选的 相关输出来自多个相关部分的每一个的输出;以及延迟分布生成部分，被配置为输出通过基于来自分析部分的输出自适应地选择或组合来自多个相关部分的输出的部分而获得的延迟分布 。

公开(公告)号：US07496384B2

公开(公告)日：2009-02-24

申请号：US11288171

申请日：2005-11-29

申请人： Ichiro Seto ,  Yasushi Murakami ,  Osamu Shibata ,  Hidehiro Matsuoka

发明人： Ichiro Seto ,  Yasushi Murakami ,  Osamu Shibata ,  Hidehiro Matsuoka

IPC分类号： H04M1/00

CPC分类号： H04W88/08 ,  H01Q3/2605 ,  H01Q3/2676 ,  H04B7/0617 ,  H04B7/086 ,  H04B10/25753 ,  H04B17/10 ,  H04B17/20 ,  H04J14/02 ,  H04J14/0298

摘要： There is disclosed a radio communication system in which a constitution of a base station and further a control station can be simplified. A radio communication system according to the present invention converts a received signal received by a plurality of antenna elements in a base station to a signal of different frequency band, and then conflates the converted signal in order to generate sub-carrier wave multiplex signal. The signal is converted to an optical signal, and then the optical signal is transmitted to a control station via an optical fiber. Or the control station performs weighting to phase of the transmitted signal transmitted from a plurality of antennas of a base station, and then performs frequency conversion to different frequency band, and then conflates the converted signal in order to generate the sub-carrier wave multiplex signal. The signal is converted to an optical signal, and then an optical signal is transmitted to the base station side via the optical fiber. The control station and the base station divides the received sub-carrier wave multiplex signal by each frequency band, and then the frequency of the divided signals are converted to the same frequency band in order to generate the transmitted/received signal of each antenna element. By such a constitution, it is possible to reduce constituent of the optical transmission components to the minimum and to simplify the constitution of the base station. Furthermore, it is possible to maintain the relative phase difference and the relative intensity of the transmitted/received signal of each antenna element. Because of this, it is possible to estimate an arrival direction of the received signal and to control radiation beam pattern of the transmitted signal.

摘要翻译： 公开了一种无线电通信系统，其中可以简化基站的结构和控制站的结构。 根据本发明的无线电通信系统将由基站中的多个天线元件接收的接收信号转换为不同频带的信号，然后混合转换的信号以产生副载波复用信号。 信号被转换为光信号，然后光信号通过光纤传输到控制站。 或者控制站对从基站的多个天线发送的发送信号的相位进行加权，然后对不同的频带进行频率转换，然后混合转换的信号，以产生副载波复用信号 。 信号被转换为光信号，然后经由光纤将光信号发送到基站侧。 控制站和基站将接收到的副载波复用信号除以每个频带，然后将分频信号的频率转换为相同的频带，以便产生每个天线单元的发送/接收信号。 通过这样的结构，能够将光传输部件的成分最小化，并且简化基站的结构。 此外，可以保持每个天线元件的发送/接收信号的相对相位差和相对强度。 因此，可以估计接收信号的到达方向并控制发送信号的辐射束图案。

公开(公告)号：US20070127361A1

公开(公告)日：2007-06-07

申请号：US11531190

申请日：2006-09-12

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Noritaka Deguchi ,  Seiichiro Horikawa

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Noritaka Deguchi ,  Seiichiro Horikawa

IPC分类号： H04J11/00

CPC分类号： H04L27/2647 ,  H04L27/2602

摘要： According to an aspect of the present invention, there is provided with an OFDM (Orthogonal Frequency Division Multiplexing) transmission apparatus, including: a subcarrier modulator configured to perform subcarrier modulation on a data sequence to generate subcarrier modulated signals; an IFFT unit configured to perform IFFT (Inverse Fast Fourier Transform) processing on the subcarrier modulated signals to generate a first OFDM symbol having a length corresponding to the number of FFT points at the IFFT processing; a symbol length shortener configured to obtain a part of the generated first OFDM symbol as a second OFDM symbol; and a transmitter configured to transmit the second OFDM symbol obtained to an other communication apparatus.

摘要翻译： 根据本发明的一个方面，提供了一种OFDM（正交频分复用）传输装置，包括：副载波调制器，被配置为对数据序列执行子载波调制以产生副载波调制信号; IFFT单元，被配置为对所述子载波调制信号执行IFFT（快速傅里叶逆变换）处理，以产生具有与所述IFFT处理中的FFT点数相对应的长度的第一OFDM符号; 符号长度缩短器，被配置为获得所生成的第一OFDM符号的一部分作为第二OFDM符号; 以及发送器，被配置为将获得的第二OFDM符号发送到另一通信装置。

公开(公告)号：US07103119B2

公开(公告)日：2006-09-05

申请号：US10023712

申请日：2001-12-21

申请人： Hidehiro Matsuoka ,  Shuichi Obayashi

发明人： Hidehiro Matsuoka ,  Shuichi Obayashi

IPC分类号： H04B7/10 ,  H04L1/02

CPC分类号： H01Q3/2605 ,  H01Q1/246 ,  H04B7/086 ,  H04L27/2647

摘要： A beam formation circuit and an apparatus and a method of receiving radio frequency signals making use of a smart antenna are described in which the amount of computation tasks required for the weight calculation is significantly reduced. In realizing the directivity of the smart antenna, the output signals corresponding to a plurality of sub-carriers are weighted with a common antenna weight for each of the antenna elements.

摘要翻译： 描述了使用智能天线接收射频信号的波束形成电路和装置和方法，其中重量计算所需的计算任务量显着减少。 在实现智能天线的方向性时，对应于多个子载波的输出信号用每个天线元件的公共天线权重进行加权。

公开(公告)号：US08115521B2

公开(公告)日：2012-02-14

申请号：US12706949

申请日：2010-02-17

申请人： Hidehiro Matsuoka ,  Masami Aizawa ,  Tatsuhisa Furukawa

发明人： Hidehiro Matsuoka ,  Masami Aizawa ,  Tatsuhisa Furukawa

IPC分类号： H04B1/16

CPC分类号： H04L27/0014

摘要： A frequency error detecting circuit includes: an oscillator; a frequency converting unit for a received signal on the basis of the oscillation output and output the received signal; a time-to-frequency converting unit configured to convert the output of the frequency converting unit into a frequency domain signal; a frequency shift determining unit configured to determine presence or absence of a frequency shift between an output frequency of the frequency converting unit and a predetermined carrier frequency; and a control unit configured to repeat frequency conversion processing and time-to-frequency conversion processing while controlling an oscillation frequency of the oscillator on the basis of a determination result of the frequency shift determining unit and cause the output frequency of the frequency converting unit to converge on a predetermined value to thereby detect a frequency error between the frequency of the received signal and the predetermined carrier frequency.

摘要翻译： 频率误差检测电路包括：振荡器; 基于振荡输出的接收信号的频率转换单元，并输出接收信号; 时频转换单元，被配置为将频率转换单元的输出转换为频域信号; 频率确定单元，被配置为确定频率转换单元的输出频率与预定载波频率之间的频移的存在或不存在; 以及控制单元，其被配置为在基于所述频移确定单元的确定结果控制所述振荡器的振荡频率的同时重复频率转换处理和时间 - 频率转换处理，并且使所述频率转换单元的输出频率 收敛于预定值，从而检测接收信号的频率与预定载波频率之间的频率误差。

公开(公告)号：US07627047B2

公开(公告)日：2009-12-01

申请号：US11288112

申请日：2005-11-29

申请人： Makoto Tsuruta ,  Hidehiro Matsuoka ,  Hideo Kasami

发明人： Makoto Tsuruta ,  Hidehiro Matsuoka ,  Hideo Kasami

IPC分类号： H04K1/10

CPC分类号： H04B7/0874 ,  H04B7/084 ,  H04B7/0857 ,  H04L27/2657 ,  H04L27/2675

摘要： An OFDM receiver apparatus mounted on a movable object for receiving an OFDM signal, includes a plurality of directional antennas which receive an OFDM signal, an estimator to estimate a center frequency of a spectrum of a Doppler component from one of the received signals or a multiplexed signal obtained by multiplexing the received signals, a shift quantity calculator to calculate a shift quantity from the estimated center frequency of the estimator and directivity information representing directivity directions of the directional antennas, a plurality of frequency shifters to subject the received signals to frequency shift according to the shift quantity to compensate for Doppler shift, a combining unit to diversity-combine frequency shifted signals of the frequency shifters, and a demodulator/decoder to demodulate and decode combining diversity signals of the combining unit.

摘要翻译： 安装在用于接收OFDM信号的可移动物体上的OFDM接收机装置包括接收OFDM信号的多个定向天线，估计器，用于从接收信号之一估计多普勒分量的频谱的中心频率，或多路复用 通过多路复用接收信号获得的信号;移位量计算器，用于根据估计器的估计中心频率计算偏移量，以及指示方向性天线的方向性方向的方向性信息;多个频移器，用于使接收到的信号进行频移， 到用于补偿多普勒频移的移位量，用于对移频器的频移信号进行分集组合的组合单元，以及解调/解码器，对组合单元的组合分集信号进行解调和解码。