公开(公告)号：US20110206168A1

公开(公告)日：2011-08-25

申请号：US12883636

申请日：2010-09-16

申请人： Hidehiro Matsuoka ,  Tatsuhisa Furukawa ,  Masami Aizawa ,  Jun Mitsugi

发明人： Hidehiro Matsuoka ,  Tatsuhisa Furukawa ,  Masami Aizawa ,  Jun Mitsugi

IPC分类号： H04B1/10

CPC分类号： H04B17/345 ,  H04B17/327

摘要： According to an embodiment, a channel estimator includes a channel response estimation section configured to estimate a channel response by correlation processing between a received signal and a known pattern signal; a path power calculation section configured to measure power of each path within an output of the channel response estimation section; a noise power calculation section configured to measure noise power from the output of the channel response estimation section; a path determination section configured to determine paths to be preserved by using the path power outputted from the path power calculation section and the noise power outputted from the noise power calculation section; and a noise removal section configured to remove values in time domain excepting the paths determined at the path determination section, from the output of the channel response estimation section.

摘要翻译： 根据实施例，信道估计器包括信道响应估计部分，被配置为通过接收信号和已知模式信号之间的相关处理来估计信道响应; 路径功率计算部，被配置为测量所述信道响应估计部的输出内的各路径的功率; 噪声功率计算部，被配置为从所述信道响应估计部的输出测量噪声功率; 路径决定部，被配置为通过使用从路径功率计算部输出的路径功率和从噪声功率计算部输出的噪声功率来确定要保存的路径; 以及噪声去除部，被配置为从所述信道响应估计部的输出除去在所述路径判定部所决定的路径以外的时域中的值。

公开(公告)号：US20100207670A1

公开(公告)日：2010-08-19

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： H03B28/00

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：US20080304589A1

公开(公告)日：2008-12-11

申请号：US12052171

申请日：2008-03-20

申请人： Makoto Tsuruta ,  Jun Mitsugi ,  Hidehiro Matsuoka

发明人： Makoto Tsuruta ,  Jun Mitsugi ,  Hidehiro Matsuoka

IPC分类号： H04L27/28 ,  H04B1/10

CPC分类号： H04L27/2647 ,  H04B7/0888 ,  H04L25/022 ,  H04L25/03159 ,  H04L2025/03681

摘要： According to an embodiment of the invention, a wireless receiving apparatus includes: an antenna that receives an OFDM signal having an OFDM symbol and a guard interval; a front end section that performs frequency conversion and synchronization on the received OFDM signal; an ISI canceller that extracts a delay profile and removes leakage of the guard interval into the OFDM symbol by the use of the delay profile; a converter that performs orthogonal conversion on the ISI removed OFDM signal; an equalization section that performs equalization processing on the converted OFDM signal; an outer decoder that decodes the equalized OFDM signal; and an inner decoder that corrects an error in an inner code of the decoded OFDM signal, wherein the equalization section performs re-equalization processing on the converted OFDM signal by using a signal output from the inner decoder as the reference signal.

摘要翻译： 根据本发明的实施例，无线接收装置包括：天线，其接收具有OFDM符号和保护间隔的OFDM信号; 对所接收的OFDM信号进行频率变换和同步的前端部; ISI消除器，其提取延迟分布，并通过使用延迟分布来将保护间隔的泄漏消除到OFDM符号中; 在ISI去除的OFDM信号上执行正交转换的转换器; 对所述转换后的OFDM信号进行均衡处理的均衡部; 解码均衡的OFDM信号的外部解码器; 以及内部解码器，其校正所述解码的OFDM信号的内部代码中的错误，其中所述均衡部分通过使用从所述内部解码器输出的信号作为参考信号，对经转换的OFDM信号执行重新均衡处理。

公开(公告)号：US20070297491A1

公开(公告)日：2007-12-27

申请号：US11846650

申请日：2007-08-29

申请人： Hideo Kasami ,  Hidehiro Matsuoka ,  Tsuguhide Aoki ,  Kazumi Sato

发明人： Hideo Kasami ,  Hidehiro Matsuoka ,  Tsuguhide Aoki ,  Kazumi Sato

IPC分类号： H04B1/00

CPC分类号： H04B1/707

摘要： A receiver comprising: an antenna which receives a radio signal including N possible symbols {c1(n), c2(n), cM−1(n), cM(n)}, an N correlation units which are provided corresponding to the N possible symbols, respectively, each correlation unit detecting the degree of correlation with the radio signal received by the antenna, and a symbol determination unit which determines the symbol included in the radio signal received by the antenna based on the degree of correlation detected by the N correlation units. The N correlation units detect the degree of correlation between the radio signal received by the antenna and the N possible symbols represented by M chips {α0c1(n),α0c2(n)+α1c1(n), . . . ,α0cM−1(n)+α1cM−2(n), α0cM(n)+α1cM−1(n)}.

摘要翻译： 一种接收机，包括：天线，其接收包括N个可能符号的无线电信号，其中，n个可能的符号（n），c（M），（c），（c） N个相关单元，分别与N个可能的符号对应地设置，每个相关单元检测与由天线接收的无线电信号的相关程度;以及符号确定单元，确定由天线接收的无线电信号中包括的符号 基于由N个相关单元检测到的相关程度。 N个相关单元检测由天线接收的无线电信号与由M个码元（n）表示的N个可能符号之间的相关程度 ），α<0> 2 （n）+α1 C 1 / SUB> ^{（n），。 。 。 （n）M-1 M-2（M + 1） - - - - （1） （n）（n）（n） （n）M-1 （n）}。}

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：US20060114814A1

公开(公告)日：2006-06-01

申请号：US11268657

申请日：2005-11-08

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： H04L25/03006 ,  H04L2025/03414

摘要： An OFDM demodulator that demodulates an OFDM signal includes an antenna that receives a signal including delayed signals, an estimation circuit that estimates the channel response of the received signal, and a control circuit that controls a length of a retention time interval based on the estimated channel response. The retention time interval includes a time period from the head of a delayed signal having a maximum delay time in the delayed signals to the tail of a preceding signal in the delayed signals based on the estimated channel response. The OFDM demodulator also includes a retention memory that retains a portion of the received signal corresponding to the retention time period, and a selection circuit that selects an OFDM symbol based on a calculation of a maximum likelihood that the retained received signal is equivalent to a signal replica based on the channel response.

公开(公告)号：US6091364A

公开(公告)日：2000-07-18

申请号：US885751

申请日：1997-06-30

申请人： Yasushi Murakami ,  Akihiro Tsujimura ,  Hisao Iwasaki ,  Hiroki Shoki ,  Hidehiro Matsuoka

发明人： Yasushi Murakami ,  Akihiro Tsujimura ,  Hisao Iwasaki ,  Hiroki Shoki ,  Hidehiro Matsuoka

IPC分类号： H01Q3/01 ,  H01Q1/08 ,  H01Q9/04 ,  H01Q13/08 ,  H01Q1/38

CPC分类号： H01Q9/0471 ,  H01Q1/084 ,  H01Q9/0407

摘要： A patch having a circular shape for instance is formed on the main surface of a substrate in the shape of, for example, an equilateral triangle. The center of the main surface of the patch is at a position different from the center of the substrate. A grounding conductor is disposed on the backside of the substrate. Power is supplied to the patch through, for example, a microstrip line, triplate line, coplanar waveguide, slot line or the like. An antenna configured as described above has the center of the patch at a position different from the center of the triangle substrate, so that beams can be tilted in a desired direction by a single patch and a single feeder circuit.

摘要翻译： 例如，在基板的主表面上形成例如圆形的贴片，例如是等边三角形。 贴片主表面的中心位于与基片中心不同的位置。 接地导体设置在基板的背面。 通过例如微带线，三板线，共面波导，槽线等将功率提供给贴片。 如上所述构造的天线将贴片的中心位于与三角形基板的中心不同的位置，使得可以通过单个贴片和单个馈电电路在所需方向上倾斜波束。

公开(公告)号：US6061553A

公开(公告)日：2000-05-09

申请号：US2394

申请日：1998-01-02

申请人： Hidehiro Matsuoka ,  Hiroki Shoki ,  Akihiro Tsujimura ,  Yasushi Murakami

发明人： Hidehiro Matsuoka ,  Hiroki Shoki ,  Akihiro Tsujimura ,  Yasushi Murakami

IPC分类号： H01Q3/26 ,  H04B1/06

CPC分类号： H01Q3/2652 ,  H01Q3/2605 ,  H01Q3/2611

摘要： An adaptive antenna is disclosed, that comprises a plurality of antenna elements 1.sub.1, 1.sub.2, . . . , and 1.sub.N with different directivity, delay profile measuring units 2.sub.1, 2.sub.2, . . . , and 2.sub.N for estimating states of received signals of the antenna elements for each of delay times that have been designated, antenna selecting units 3.sub.1, 3.sub.2, . . . , and 3.sub.L for selecting a part of the antenna elements for each of the delay times corresponding to the estimated result, adaptive signal processing portions 4.sub.1, 4.sub.2, . . . , and 4.sub.L for determining the received signals of the part of the antenna elements that have been selected and multiplying the received signals to which relevant weights have been determined for each of the delay time and summing the weighted signals, delaying circuits 5.sub.2 and 5.sub.3 for compensating the time lag, or delay of each of the received signals for each of the delay times, and a combining unit 6 for combining the weighted signals that have been compensated for the delay times.

摘要翻译： 公开了一种自适应天线，其包括多个天线元件11,12。 。 。 ，和1N具有不同的方向性，延迟分布测量单元21,22。 。 。 以及2N，用于估计每个被指定的延迟时间的天线元件的接收信号的状态，天线选择单元31,32。 。 。 以及3L，用于对应于估计结果的每个延迟时间选择天线元件的一部分，自适应信号处理部分41,42，...。 。 。 和4L，用于确定已经选择的天线元件的部分的接收信号，并且对已经为每个延迟时间确定了相关权重的接收信号并对加权信号求和，对延迟电路52和53进行补偿 每个延迟时间的每个接收信号的时间延迟或延迟，以及用于组合已经被补偿了延迟时间的加权信号的组合单元6。

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。