公开(公告)号：US06333713B1

公开(公告)日：2001-12-25

申请号：US09639996

申请日：2000-08-17

申请人： Youichi Nakagawa ,  Masahiro Mimura ,  Takaaki Kishigami ,  Makoto Hasegawa ,  Takashi Fukagawa

发明人： Youichi Nakagawa ,  Masahiro Mimura ,  Takaaki Kishigami ,  Makoto Hasegawa ,  Takashi Fukagawa

IPC分类号： G01S352

CPC分类号： G01S3/74 ,  H01Q3/26 ,  H01Q3/2605

摘要： Array elements 111-1 to 111-n of array antenna 101 are arranged at respective different heights from a ground so as not to overlap to each other in a vertical direction. Received frequency conversion section 102 converts a radio frequency signal received at each of the array elements 111-1 to 111-n of array antenna 101 into an intermediate frequency signal or baseband signal. A/D conversion section 103 converts an analog signal output from received frequency conversion section 102 into a digital signal using a proper sampling frequency. Direction estimating section 105 estimates directions of an arrival radio signal in a horizontal plane and vertical plane using received digital signals obtained in A/D conversion section 103. It is thereby possible to suppress increases in the number of array elements and computation amount, and to improve estimation accuracy in the vertical direction and resolution at the time a plurality of signals arrive.

摘要翻译： 阵列天线101的阵列元件111-1至111-n被布置在与地面不同的高度处，以便在垂直方向上彼此不重叠。 接收频率转换部分102将在阵列天线101的每个阵列元件111-1至111-n处接收的射频信号转换为中频信号或基带信号。 A / D转换部分103使用适当的采样频率将从接收频率转换部分102输出的模拟信号转换成数字信号。 方向估计部105使用在A / D转换部103中获得的接收数字信号来估计水平面和垂直面中的到达无线信号的方向。由此，可以抑制数组元素的数量的增加和计算量， 提高多个信号到达时的垂直方向的估计精度和分辨率。

公开(公告)号：US5617451A

公开(公告)日：1997-04-01

申请号：US302982

申请日：1994-09-12

申请人： Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Hiroyuki Harada ,  Takaaki Kishigami ,  Yasunari Tanaka

发明人： Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Hiroyuki Harada ,  Takaaki Kishigami ,  Yasunari Tanaka

IPC分类号： H03D3/00 ,  H04B1/30 ,  H04B17/00 ,  H03D1/00

CPC分类号： H04B1/30 ,  H03D3/007 ,  H04B17/318

摘要： A direct-conversion receiver includes a direct-conversion demodulator. A first device detects a strength of a received signal. A clock signal generator outputs a clock signal in response to a reception start signal. The clock signal has a frequency corresponding to a symbol rate or higher. A second device samples an output signal of the demodulator at a timing determined by the clock signal. A third device samples an output signal of the first device at a timing determined by the clock signal. A fourth device stores "n" output signals of the second device which relate to a signal periodically transmitted from a transmitting station "n" times, wherein "n" denotes a natural number equal to 2 or greater. A fifth device stores "n" output signals of the third device which correspond in timing to the "n" output signals of the second device. A sixth device reads out signals from the fourth device, and reads out signals from the fifth device. The sixth device weights the signals read out from the fourth device in response to the signals read out from the fifth device. A seventh device combines output signals of the sixth device.

摘要翻译： 直接转换接收机包括直接转换解调器。 第一设备检测接收信号的强度。 时钟信号发生器响应于接收开始信号输出时钟信号。 时钟信号具有对应于符号率或更高的频率。 第二设备在由时钟信号确定的定时处对解调器的输出信号进行采样。 第三设备在由时钟信号确定的定时采样第一设备的输出信号。 第四设备存储与从发送站“n”周期性地发送的信号相关的第二设备的“n”个输出信号，其中“n”表示等于2或更大的自然数。 第五装置将与定时对应的第三装置的“n”个输出信号存储到第二装置的“n”个输出信号。 第六设备从第四设备读出信号，并从第五设备读出信号。 响应于从第五装置读出的信号，第六装置对从第四装置读出的信号进行加权。 第七设备组合第六设备的输出信号。

公开(公告)号：US5606574A

公开(公告)日：1997-02-25

申请号：US305513

申请日：1994-09-13

申请人： Makoto Hasegawa ,  Masahiro Mimura ,  Hirohide Hirabayashi ,  Naoki Adachi ,  Yasuaki Namura ,  Hideko Sakai

发明人： Makoto Hasegawa ,  Masahiro Mimura ,  Hirohide Hirabayashi ,  Naoki Adachi ,  Yasuaki Namura ,  Hideko Sakai

IPC分类号： G01S13/76 ,  G01S13/78 ,  H04B7/26

CPC分类号： G01S13/782 ,  G01S13/767 ,  G01S13/784

摘要： A first mobile unit identification system having a interrogator and responder. The interrogator transmits a given magnitude of a spread spectrum coded signal in standby mode. The responder receives the spread spectrum coded signal and when the magnitude of received signal exceeds a given value, it reflects the transmitted spread spectrum coded signal with ID code when the magnitude of received signal exceeds the given value. The interrogator receives this and then, transmits data to the responder with amplitude modulating the spread spectrum coded signal with the data. The responder detects by amplitude demodulation and stores the detected data. The interrogator may transmit a mode change code. The responder may transmit an end code after transmission of a data train. A second interrogator informs the responder of the standby mode thereof by amplitude-modulated signal having a given cycle. A second responder judges whether or not the second interrogator is in standby mode by detecting the cycle and sends a communication requesting signal Q to the second responder and then, transmits ID code. In response to the signal Q, tile second interrogator transmits a signal having a fixed magnitude. A method of modulating for the mobile unit identifying system is also disclosed.

摘要翻译： 具有询问器和应答器的第一移动单元识别系统。 询问器在待机模式下发送给定幅度的扩频编码信号。 应答器接收扩频编码信号，当接收信号的幅度超过给定值时，当接收信号的幅度超过给定值时，它反映发射的具有ID码的扩频编码信号。 询问器接收该数据，然后利用数据对扩展频谱编码信号进行幅度调制，向响应者发送数据。 响应者通过幅度解调检测并存储检测到的数据。 询问器可以发送模式改变码。 响应者可以在传输数据列之后发送结束码。 第二询问器通过具有给定周期的幅度调制信号向响应者通知其备用模式。 第二响应者通过检测周期来判断第二询问器是否处于待机模式，并向第二应答器发送通信请求信号Q，然后发送ID码。 响应于信号Q，瓦片第二询问器发送具有固定大小的信号。 还公开了一种调制移动单元识别系统的方法。

公开(公告)号：US5450032A

公开(公告)日：1995-09-12

申请号：US209140

申请日：1994-03-11

申请人： Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Hiroyuki Harada

发明人： Masahiro Mimura ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Hiroyuki Harada

IPC分类号： H04B1/26 ,  H04L27/14 ,  H04L27/152

CPC分类号： H04L27/152

摘要： A first demodulator for generating a demodulated signal by demodulating first and second baseband signals obtained from a received frequency shift keying signal, comprises: a first mixer for mixing the first baseband signal with the second baseband signal; a frequency divider for 1/2-frequency-dividing an output of the first mixer; a second mixer for mixing the first baseband signal with an output of said frequency divider; and a frequency judging circuit for judging whether or not a frequency of an output of the second mixer is larger than a reference value to generate the demodulated signal. In order to effect the frequency judging by the frequency judging circuit always at a high frequency, there may be further provided a first inverter after the first mixer, a second inverter after the frequency judging circuit for compensating the inverting of the first inverter, and a frequency comparing circuit for detecting the frequency of the output of the first mixer. In order to effect the frequency judging on the second baseband signal side, third and fourth mixers may be further provided. The frequency judging are made from the first baseband signal and the second baseband signal.

摘要翻译： 一种用于通过解调从接收的频移键控信号获得的第一和第二基带信号来产生解调信号的第一解调器，包括：第一混频器，用于混合第一基带信号与第二基带信号; 用于对所述第一混频器的输出进行1/2分频的分频器; 第二混频器，用于将第一基带信号与所述分频器的输出混频; 以及频率判定电路，用于判断第二混频器的输出频率是否大于参考值，以产生解调信号。 为了总是以高频率进行频率判定电路的频率判定，还可以在第一混频器之后设置第一反相器，频率判定电路之后的第二反相器补偿第一反相器的反相，以及 频率比较电路，用于检测第一混频器的输出频率。 为了实现第二基带信号侧的频率判定，可以进一步提供第三和第四混频器。 从第一基带信号和第二基带信号进行频率判定。

公开(公告)号：US07062245B2

公开(公告)日：2006-06-13

申请号：US09739817

申请日：2000-12-20

申请人： Kentaro Miyano ,  Youichi Nakagawa ,  Masahiro Mimura ,  Makoto Hasegawa ,  Yoshio Koyanagi

发明人： Kentaro Miyano ,  Youichi Nakagawa ,  Masahiro Mimura ,  Makoto Hasegawa ,  Yoshio Koyanagi

IPC分类号： H04B1/06 ,  H04B7/00

CPC分类号： H04B7/10

摘要： Corresponding to transmission data 101, phase controller 105 is controlled to shift a phase of modulated signal 103 by 0° or 180°. Planes of polarization of modulated signals to be transmitted from antennas 106 and 107 are made different from each other corresponding to transmission data 101. The electric field strength of a signal received at antenna 108 changes corresponding to the plane of polarization, thereby voltage value 113 output from electric field strength detector 111 varies corresponding to transmission data 101, and using this variation, judged result 115 is obtained. Two results, namely, demodulated data 112 and judged result 115 are input to comparing circuit 116, whereby the reception apparatus is capable of obtaining received data 117 with high quality.

摘要翻译： 对应于发送数据101，相位控制器105被控制以将调制信号103的相位移位0°或180°。 将要从天线106和107发送的调制信号的偏振平面与对应于发送数据101的彼此不同。 在天线108处接收的信号的电场强度相应于偏振面变化，从电场强度检测器111输出的电压值113对应于传输数据101变化，并且使用该变化，获得判断结果115。 两个结果，即解调数据112和判定结果115被输入到比较电路116，由此接收装置能够以高质量获得接收数据117。

公开(公告)号：US5414736A

公开(公告)日：1995-05-09

申请号：US925673

申请日：1992-08-07

申请人： Makoto Hasegawa ,  Kazuaki Takahashi ,  Masahiro Mimura ,  Kazunori Watanabe ,  Katsushi Yokozaki ,  Hiroyuki Harada

发明人： Makoto Hasegawa ,  Kazuaki Takahashi ,  Masahiro Mimura ,  Kazunori Watanabe ,  Katsushi Yokozaki ,  Hiroyuki Harada

IPC分类号： H04L27/152 ,  H03D3/00

CPC分类号： H04L27/152

摘要： An FSK data receiving system is provided which is capable of constituting a direct-conversion receiver suitable for realizing an integrated circuit, is capable of decoding in a wide receiving band width, and is capable of realizing a small-sized and less-electric power consumption data receiving. An FSK-modulated local oscillator signal 3 is applied to a local oscillator 2, and there is provided a decode circuit 15 which obtains the decode signal 14 by judging whether the FSK-modulated frequency deviation of the carrier wave signal 1 is a positive deviation or a negative deviation on the basis of a comparison result of a voltage change in a frequency-voltage conversion circuit 16 for a base-band signal 8; i.e. the output signal of a frequency mixer 6. An offset amount of the local oscillator frequency is judged by a voltage judging circuit 17 to produce a control signal 18 Further, there is provided another decode circuit 22 which makes a judgement of frequency change of the base-band signal 8 and a judgement of in-phase/opposite-phase relationship from the decode signal 14 and the output of the voltage judging circuit 17 so as to obtain a decode signal 23. Moreover, there is provided a decode signal processing circuit 25 which obtains a decode signal 24 from the decode signals 14, 23 in response to the control signal 18.

摘要翻译： 提供一种FSK数据接收系统，其能够构成适合于实现集成电路的直接转换接收机，能够以宽的接收带宽进行解码，并且能够实现小型和小电力的功耗 数据接收。 FSK调制的本地振荡器信号3被施加到本地振荡器2，并且提供了解码电路15，其通过判断载波信号1的FSK调制的频率偏差是正偏差来获得解码信号14，或者 基于用于基带信号8的频率 - 电压转换电路16中的电压变化的比较结果的负偏差; 即混频器6的输出信号。本地振荡器频率的偏移量由电压判断电路17判定，以产生控制信号18。另外，还提供另一个解码电路22， 基带信号8和来自解码信号14和电压判断电路17的输出的同相/反相位关系的判断，以获得解码信号23.此外，提供了一种解码信号处理电路 25，其响应于控制信号18从解码信号14,23获得解码信号24。

公开(公告)号：US5309113A

公开(公告)日：1994-05-03

申请号：US952657

申请日：1992-09-28

申请人： Masahiro Mimura ,  Makoto Hasegawa ,  Kazunori Watanabe ,  Hiroyuki Harada

发明人： Masahiro Mimura ,  Makoto Hasegawa ,  Kazunori Watanabe ,  Hiroyuki Harada

IPC分类号： H04B1/26 ,  H04L27/14 ,  H04L27/152 ,  H03D3/00

CPC分类号： H04L27/1525

摘要： An FSK demodulator for demodulating first and second baseband signals obtained from a received frequency shift keying signal, the first and second baseband signals having a quadrature relation therebetween, a lead and lag relation between the first and second baseband signals being changed in accordance with frequency shift from a carrier frequency of the frequency shift keying signal, comprises: a voltage change judging circuit for judging whether a magnitude of the first baseband signal increases or decreases within a predetermined interval; and an inverting circuit responsive to an output of the voltage change judging circuit and the second baseband signal for outputting a demodulated signal produced by inverting the second baseband signal in accordance with the output of the voltage change judging circuit. In addition, a second voltage change judging circuit and a second inverting circuit and a combining circuit for combining the results of said first and second inverting circuits may be provided to improve noise resistance. Inflection points in the baseband signal are detected to select one output from the first, second inverting circuit and the combining circuit in accordance with detection of the inflection points.

摘要翻译： 一种FSK解调器，用于解调从接收的频移键控信号获得的第一和第二基带信号，第一和第二基带信号之间具有正交关系，第一和第二基带信号之间的引导和滞后关系根据频移而改变 包括：电压变化判断电路，用于在预定间隔内判断第一基带信号的大小是否增加或减小; 以及响应于电压变化判断电路和第二基带信号的输出的反相电路，用于根据电压变化判断电路的输出输出通过反转第二基带信号而产生的解调信号。 此外，可以提供用于组合所述第一和第二反相电路的结果的第二电压变化判断电路和第二反相电路以及组合电路，以改善抗噪声性。 检测基带信号中的拐点，根据检测拐点来选择来自第一，第二反相电路和组合电路的一个输出。

公开(公告)号：US5293408A

公开(公告)日：1994-03-08

申请号：US942183

申请日：1992-09-09

申请人： Kazuaki Takahashi ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Yasumi Imagawa ,  Hiroyuki Harada ,  Masahiro Mimura ,  Yasuaki Namura

发明人： Kazuaki Takahashi ,  Makoto Hasegawa ,  Katsushi Yokozaki ,  Yasumi Imagawa ,  Hiroyuki Harada ,  Masahiro Mimura ,  Yasuaki Namura

IPC分类号： H04B1/30 ,  H04L27/152 ,  H04B1/10

CPC分类号： H04B1/30 ,  H04L27/152

摘要： A data receiving system comprising an I base-band signal and a Q base-band signal which are used in a quadrature demodulation operation. Zero-crossing points of respective base-band signals are detected and a control signal is generated in response to each zero-crossing point. A phase-shift switching circuit alternately selects either the I base-band signal or the Q base-band signal in response to the control signal to generate an I/Q base-band signal. And, a demodulation operation is executed on the basis of the I/Q signal.

摘要翻译： 一种数据接收系统，包括在正交解调操作中使用的I基带信号和Q基带信号。 检测各基带信号的过零点，并响应于每个过零点产生控制信号。 相移切换电路响应于控制信号交替地选择I基带信号或Q基带信号以产生I / Q基带信号。 并且，基于I / Q信号执行解调操作。

公开(公告)号：US08204279B2

公开(公告)日：2012-06-19

申请号：US13090577

申请日：2011-04-20

申请人： Kenta Takahashi ,  Shinji Hirata ,  Hideitsu Hino ,  Masahiro Mimura

发明人： Kenta Takahashi ,  Shinji Hirata ,  Hideitsu Hino ,  Masahiro Mimura

IPC分类号： G06K9/00

CPC分类号： G06K9/00885 ,  G06F21/32 ,  G06F2221/2107 ,  G06K2009/00953 ,  G07C9/00158 ,  G07C2209/12 ,  H04K1/00 ,  H04L9/3231 ,  H04L2209/805

摘要： A computer readable medium embodying a program to be executed by a terminal device used for a biometric authentication, the program including: an image generation code generating an enrolled image and a verification image from biometric information of a user collected at a sensor coupled to the terminal device; a filter generation code generating a random filter for scrambling the enrolled image and an inverse filter of the random filter; a transformation code transforming the enrolled image to a registration template by applying the random filter to the enrolled image and transforming the verification image to a filtered verification image by applying the inverse filter to the verification image; communication code transmitting the registration template and the filtered verification image to a biometric server thereby the biometric server performs biometric authentication of the user based on the cross-correlation between the registration template and the filtered verification image.

摘要翻译： 一种体现由用于生物认证的终端设备执行的程序的计算机可读介质，所述程序包括：生成注册图像的图像生成代码和来自耦合到所述终端的传感器收集的用户的生物特征信息的验证图像 设备; 生成随机滤波器的滤波器生成代码，用于对登记的图像进行加扰和随机滤波器的反相滤波器; 转换代码，通过将随机过滤器应用于登记图像，并通过对验证图像应用逆滤波器将验证图像变换为滤波后的验证图像，将注册的图像变换为注册模板; 通信代码将注册模板和过滤的验证图像发送到生物测定服务器，从而生物测定服务器基于注册模板和经滤波的验证图像之间的互相关来执行用户的生物体认证。

公开(公告)号：US08059637B2

公开(公告)日：2011-11-15

申请号：US12472869

申请日：2009-05-27

申请人： Hiroshi Doi ,  Masahiro Mimura ,  Taisuke Matsumoto

发明人： Hiroshi Doi ,  Masahiro Mimura ,  Taisuke Matsumoto

IPC分类号： H04L12/50

CPC分类号： H04W48/12 ,  H04W28/06 ,  Y02D70/142

摘要： A beacon slot position control section of a radio communication apparatus constituting a radio network system which detects whether empty beacon slots are present in a beacon period. When an empty beacon slot is present before the period in which the radio communication apparatus transmits a beacon, a movable counter starts counting a specified number of super frames. When the count is completed, the radio communication apparatus transmits a beacon of the radio communication apparatus at the earlier empty beacon slot. Consequently, since the empty beacon slots are eliminated and the beacon period is compacted, even if the number of radio communication apparatuses joining the radio network system fluctuates dynamically, the radio communication apparatus can perform radio communication with high efficiency and less waste of consumed electricity.

摘要翻译： 构成无线电网络系统的无线电通信装置的信标时隙位置控制部分，其检测信标周期中是否存在空信标时隙。 当在无线通信装置发送信标的期间之前存在空信标时隙时，可移动计数器开始计数指定数量的超帧。 当计数完成时，无线通信装置在较早的空信标时隙发送无线通信装置的信标。 因此，由于空信标时隙被消除并且信标周期被压缩，即使加入无线电网络系统的无线电通信装置的数量动态地波动，无线电通信装置可以以高效率和较少的消耗电力浪费进行无线电通信。