公开(公告)号：US5025261A

公开(公告)日：1991-06-18

申请号：US464141

申请日：1990-01-16

申请人： Tomozo Ohta ,  Hiroshi Nakano ,  Masao Miyazaki

发明人： Tomozo Ohta ,  Hiroshi Nakano ,  Masao Miyazaki

IPC分类号： G01C21/26 ,  G01S5/00 ,  G01S5/14 ,  G01S19/22 ,  G01S19/42 ,  G08G1/13 ,  G08G1/137

CPC分类号： G08G1/13 ,  G01C21/26 ,  G01S19/42 ,  G01S5/0009 ,  G08G1/137

摘要： A mobile navigation system using a communication system between at least one mobile object and a key station. The navigation system includes a unit mounted on the mobile object for determining the position of the mobile object, and a unit mounted on the mobile object for transmitting data representative of the determined position to the key station via the communication system. The navigation system further includes a data base unit mounted in the key station for storing map data, a unit mounted in the key station for deriving map data of an area including the position of the mobile object from the data base unit, in response to the transmitted position data, a unit mounted in the key station for transmitting data including the derived map data to the mobile object via the communication system, and a unit mounted on the mobile object for displaying a composite image composed of the position data of the mobile object and the map data, in response to the transmitted data from the key station.

公开(公告)号：US4991228A

公开(公告)日：1991-02-05

申请号：US500215

申请日：1990-03-28

申请人： Tomozo Ohta ,  Masao Miyazaki ,  Naoki Okamoto

发明人： Tomozo Ohta ,  Masao Miyazaki ,  Naoki Okamoto

IPC分类号： H03D9/06 ,  H05K1/00 ,  H05K1/05 ,  H05K1/14 ,  H05K1/18

CPC分类号： H03D9/06 ,  H05K1/0284 ,  H05K1/05 ,  H05K1/14 ,  H05K1/181

摘要： A microwave converter comprises circuit components formed on the outer surfaces of a three-dimensional body. The inner surfaces of the body constitute a grounding surface. A local oscillator is disposed on one of the inner surfaces. The three-dimensional body may be an electrically conductive body having a hollow space in which the local oscillator is disposed.

公开(公告)号：US5434787A

公开(公告)日：1995-07-18

申请号：US866021

申请日：1992-04-08

申请人： Naoki Okamoto ,  Takeshi Okamoto ,  Masao Miyazaki ,  Tomozo Ohta

发明人： Naoki Okamoto ,  Takeshi Okamoto ,  Masao Miyazaki ,  Tomozo Ohta

IPC分类号： G01S19/09 ,  G07C5/00 ,  G07C5/08 ,  G06F165/00

CPC分类号： G01S19/09 ,  G07C5/008 ,  G07C5/0858

摘要： A GPS position measuring system includes at least one mobile station and a base station associated with the mobile station. The mobile station is provided with an antenna for receiving one or more GPS signals from the corresponding GPS satellites, an amplifying and frequency converting circuit for amplifying the received signal and converting the amplified GPS signal into a signal on an IF band, an analog-to-digital converter for converting the signal on the IF band into a digital signal, and a writing unit for writing the digital signal into a memory card in order to transfer the digital signal to the base station.

摘要翻译： GPS位置测量系统包括至少一个移动站和与移动站相关联的基站。 移动台设置有用于从相应的GPS卫星接收一个或多个GPS信号的天线，放大和频率转换电路，用于放大接收到的信号并将放大的GPS信号转换成IF频带上的信号，模拟到 用于将IF频带上的信号转换为数字信号的数字转换器，以及用于将数字信号写入存储卡以将数字信号传送到基站的写入单元。

公开(公告)号：US5289506A

公开(公告)日：1994-02-22

申请号：US842540

申请日：1992-02-27

申请人： Takamitsu Kitayama ,  Masao Miyazaki ,  Tomozo Ohta ,  Takahiro Chihara

发明人： Takamitsu Kitayama ,  Masao Miyazaki ,  Tomozo Ohta ,  Takahiro Chihara

IPC分类号： H03J7/06 ,  H04L27/00 ,  H04L27/227 ,  H04L27/06

CPC分类号： H04L27/2273 ,  H03J7/065 ,  H04L2027/003 ,  H04L2027/0073

摘要： An AFC circuit stabilizes the frequency of an intermediate frequency signal to be applied to a demodulation circuit. A frequency conversion circuit responds to a local oscillation signal generated from a voltage-controlled oscillation circuit to convert the frequency of a digital modulation signal and applies the converted frequency to the demodulation circuit. A carrier reproduction circuit in the demodulation circuit reproduces the carrier of the intermediate frequency signal to output a synchronizing detection signal. The frequency of the reproduced carrier is frequency-divided by a frequency dividing circuit. A frequency division output thereof is counted by a counter for a definite period. Data is outputted from a microprocessor in response to a count output of the counter and the synchronizing detection signal, and the data is then converted into an AFC voltage by a D/A converter. The converted voltage is supplied as a control voltage to the voltage-controlled oscillation circuit. A stable intermediate frequency signal can be obtained by frequency-dividing the frequency of the carrier and counting the frequency division output thereof.

摘要翻译： AFC电路使要施加到解调电路的中频信号的频率稳定。 频率转换电路响应于从压控振荡电路产生的本地振荡信号，以转换数字调制信号的频率，并将转换的频率应用于解调电路。 解调电路中的载波再现电路再现中频信号的载波以输出同步检测信号。 再现载波的频率由分频电路分频。 其分频输出由计数器计数一定时间。 响应于计数器的计数输出和同步检测信号，从微处理器输出数据，然后通过D / A转换器将数据转换成AFC电压。 将转换的电压作为控制电压提供给压控振荡电路。 可以通过对载波的频率进行分频并对其分频输出进行计数来获得稳定的中频信号。

公开(公告)号：US5278514A

公开(公告)日：1994-01-11

申请号：US935118

申请日：1992-08-27

申请人： Takahiro Chihara ,  Masao Miyazaki ,  Tomozo Ohta

发明人： Takahiro Chihara ,  Masao Miyazaki ,  Tomozo Ohta

IPC分类号： H04L27/14 ,  H04L27/227 ,  H04L27/233

CPC分类号： H04L27/2338 ,  H04L27/227

摘要： An MSK signal demodulating circuit including a carrier reproducing circuit for reproducing a carrier phase-synchronized with a component of a mark frequency or a space frequency of an MSK signal, a detector for performing synchronous detection of the MSK signal by means of the reproduced carrier, an identification circuit for converting an analog output from this detector into serial digital data, and a serial-parallel conversion circuit for converting the serial digital data into I, Q parallel data.

摘要翻译： 一种MSK信号解调电路，包括用于再现与MSK信号的标记频率或空间频率的分量相位同步的载波的载波再现电路，用于通过再现的载波执行MSK信号的同步检测的检测器， 用于将来自该检测器的模拟输出转换为串行数字数据的识别电路，以及用于将串行数字数据转换成I，Q并行数据的串并转换电路。

公开(公告)号：US5228036A

公开(公告)日：1993-07-13

申请号：US683454

申请日：1991-04-10

申请人： Naoki Okamoto ,  Masao Miyazaki ,  Tomozo Ohta

发明人： Naoki Okamoto ,  Masao Miyazaki ,  Tomozo Ohta

IPC分类号： H04J3/06 ,  H04L7/08

CPC分类号： H04J3/0608

摘要： A frame synchronization stabilizer for stabilizing frame synchronization of received data has a generation circuit for generating a reference pattern which is the same as a predetermined frame synchronization pattern contained in data being transmitted. The stabilizer further has a comparison circuit for comparing, bit by bit, a data pattern in a synchronization pattern area of each frame of the received data with the reference pattern from the generation circuit. The comparison circuit outputs a mismatch pulse each time when a mismatch bit is detected by the comparison, and outputs a match pulse each time when it is detected that the data pattern is fully matched with the reference pattern. The number of the mismatch pulses from the comparison circuit is counted by a first counter. The first counter outputs an out-of frame detection signal when a counted value exceeds a particular value and is reset based upon the match pulse from the comparison circuit.

公开(公告)号：US5107522A

公开(公告)日：1992-04-21

申请号：US650016

申请日：1991-02-04

申请人： Takamitsu Kitayama ,  Masao Miyazaki ,  Tomozo Ohta

发明人： Takamitsu Kitayama ,  Masao Miyazaki ,  Tomozo Ohta

IPC分类号： H03J7/06 ,  H04L27/00

CPC分类号： H03J7/065 ,  H04L2027/003 ,  H04L2027/0073

摘要： An AFC circuit stabilizes the frequency of an intermediate frequency signal to be applied to a demodulation circuit. A frequency conversion circuit responds to a local oscillation signal generated from a voltage-controlled oscillation circuit to convert the frequency of a digital modulation signal and applies the converted frequency to the demodulation circuit. A carrier reproduction circuit in the demodulation circuit reproduces the carrier of the intermediate frequency signal to output a synchronizing detection signal. The frequency of the reproduced carrier is frequency-divided by a frequency dividing circuit. A frequency division output thereof is counted by a counter for a definite period. Data is outputted from a microprocessor in response to a count output of the counter and the synchronizing detection signal, and the data is then converted into an AFC voltage by a D/A converter. The converted voltage is supplied as a control voltage to the voltage-controlled oscillation circuit. A stable intermediate frequency signal can be obtained by frequency-dividing the frequency of the carrier and counting the frequency division output thereof.

公开(公告)号：US4926182A

公开(公告)日：1990-05-15

申请号：US55363

申请日：1987-05-29

申请人： Tomozo Ohta ,  Hiroshi Nakano ,  Kazutada Higashi ,  Hirohiko Yamamoto

发明人： Tomozo Ohta ,  Hiroshi Nakano ,  Kazutada Higashi ,  Hirohiko Yamamoto

IPC分类号： G01S13/76 ,  G01S13/78 ,  G01S13/82 ,  G06K7/00 ,  G06K19/07 ,  G07C3/00 ,  G07C9/00

CPC分类号： G01S13/765 ,  G01S13/78 ,  G01S13/825 ,  G06K19/0723 ,  G06K7/0008 ,  G07C3/00 ,  G07C9/00111

摘要： A microwave data transmission apparatus adapted to transmit and receive information by microwaves, which the identification tag is made smaller in size and lighter in weight to considerably improve the convenience in setting operation for use in many applications, can be applied for the production control within the factory or the control for entering and leaving the room by a person having an identification tag.

摘要翻译： 一种微波数据传输装置，其适用于通过微波发送和接收信息，识别标签的尺寸更小，重量更轻，从而大大提高了许多应用中使用的设置操作的便利性，可应用于内部的生产控制 工厂或由具有识别标签的人进出房间的控制。

公开(公告)号：US4890076A

公开(公告)日：1989-12-26

申请号：US183983

申请日：1988-04-20

申请人： Kazutada Higashi ,  Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

发明人： Kazutada Higashi ,  Masamori Tokuda ,  Hiroshi Nakano ,  Tomozo Ohta

IPC分类号： G01S13/82 ,  H03C1/60 ,  H03C7/02

CPC分类号： H03C1/60 ,  H03C7/027 ,  H03C2200/0033 ,  H03C2200/007

摘要： The SSB modulator according to the present invention is comprised of a driving voltage generator, a diode, a bias supply circuit, an impedance transformation circuit and an input/output terminal. The SSB modulator is arranged such that the impedance of the diode is changed by changing the driving voltage impressed across the diode, resulting in the mismatching of the impedance, which leads to generation of a reflected wave. Therefore, by changing the amplitude and the phase of the above-obtained reflected wave, SSB modulation is effected. Accordingly, the SSB modulator of the present invention, requiring no particular side band filter, is compact in size, light in weight and low in manufacturing cost, with a simple structure of the circuit.

公开(公告)号：US5346300A

公开(公告)日：1994-09-13

申请号：US907137

申请日：1992-07-01

申请人： Hirohiko Yamamoto ,  Keijirou Higashi ,  Hiroyuki Takebe ,  Hiroshi Nakano ,  Tomozo Ohta

发明人： Hirohiko Yamamoto ,  Keijirou Higashi ,  Hiroyuki Takebe ,  Hiroshi Nakano ,  Tomozo Ohta

IPC分类号： H01Q11/08 ,  H01Q1/36

CPC分类号： H01Q11/08

摘要： A first radiation member 165 includes radiation conductors 166 and 167, an arm 168 and a lower connection piece 169 all integrally formed by blanking. A stub 170 is likewise integrally formed on radiation conductor 166. A second radiation member 171 includes radiation conductors 172 and 173, an arm 174 and a lower connection piece 175 all integrally formed by blanking. A stub 176 is likewise integrally formed on radiation conductor 173. A first loop comprised of radiation conductors 167 and 172, arms 168 and 174 and lower connection pieces 169 and 175 exhibits capacitive impedance at a wavelength for use. The overall length of a second loop comprised of radiation conductors 166 and 173, arms 168 and 174 and lower connection pieces 169 and 175 is set equal to that of the first loop. The second loop, however, exhibits inductive impedance at the wavelength for use by adjustment of the length of stubs 170 and 176. Adjusting stubs 170 and 176 enable control of a phase of a current flowing through the second loop.

摘要翻译： 第一辐射构件165包括通过消隐一体形成的辐射导体166和167，臂168和下连接件169。 短截线170同样整体地形成在辐射导体166上。第二辐射构件171包括辐射导体172和173，臂174和下连接件175，所述臂174和下连接片175通过消隐整体形成。 短截线176同样整体地形成在辐射导体173上。由辐射导体167和172，臂168和174以及下连接片169和175组成的第一回路在使用的波长处表现出电容性阻抗。 包括辐射导体166和173，臂168和174以及下连接件169和175的第二回路的总长度被设定为等于第一回路的总长度。 然而，第二回路在波长处显示出通过调整短截线170和176的长度来使用的电感阻抗。调节短线170和176使得能够控制流经第二回路的电流的相位。