公开(公告)号：US5532858A

公开(公告)日：1996-07-02

申请号：US136848

申请日：1993-10-18

申请人： Kazutoshi Hirohashi ,  Teruhiko Shinomiya ,  Manabu Sakane ,  Keishi Ushijima ,  Takaaki Takeda ,  Masamichi Satou ,  Michio Kikuta ,  Motoyasu Nagashima

发明人： Kazutoshi Hirohashi ,  Teruhiko Shinomiya ,  Manabu Sakane ,  Keishi Ushijima ,  Takaaki Takeda ,  Masamichi Satou ,  Michio Kikuta ,  Motoyasu Nagashima

IPC分类号： H04B10/114 ,  H04B10/10 ,  H04B10/24

CPC分类号： H04B10/1143

摘要： An optical radio communication system comprising a first light transmitting system and a second light transmitting system. Each of said first and second light transmitting system comprising a transmitting means and a receiving means. Said transmitting means comprising a light emitting element positioned in a region including and surrounding a focal point of a first parabolic reflector for emitting light beams, said first parabolic reflector having an inner reflective surface for reflecting said light beams emitted from said light emitting element, and a means for driving said light emitting element with a signal to be transmitted. Said receiving means comprising a second parabolic reflector having an inner reflective surface for reflecting incident light beams, a light receiving element positioned in a region including and surrounding a focal point of said second parabolic reflector for receiving light beams reflected by said second parabolic reflector to output signals, and means for taking out information from said signals outputted from said light receiving element. In this optical radio communication system, broadband signals such as Manchester coded signals are directly transmitted on optical radio.

摘要翻译： 一种包括第一光发射系统和第二光发射系统的光无线电通信系统。 所述第一和第二光发射系统中的每一个包括发射装置和接收装置。 所述发送装置包括位于包括并围绕第一抛物面反射器的焦点以发射光束的区域中的发光元件，所述第一抛物面反射器具有用于反射从所述发光元件发射的所述光束的内反射表面，以及 用于用要发送的信号驱动所述发光元件的装置。 所述接收装置包括具有用于反射入射光束的内部反射表面的第二抛物面反射器，位于包括并围绕所述第二抛物面反射器的焦点的区域中的光接收元件，用于接收由所述第二抛物面反射器反射的光束以输出 信号以及从所述光接收元件输出的信号中取出信息的装置。 在该光无线通信系统中，诸如曼彻斯特编码信号的宽带信号在光无线电上直接发送。

公开(公告)号：US5289306A

公开(公告)日：1994-02-22

申请号：US858292

申请日：1992-03-26

申请人： Kazutoshi Hirohashi ,  Akio Yoshikawa ,  Takaaki Takeda ,  Takeshi Nomoto ,  Keishi Ushijima

发明人： Kazutoshi Hirohashi ,  Akio Yoshikawa ,  Takaaki Takeda ,  Takeshi Nomoto ,  Keishi Ushijima

IPC分类号： H04B10/11 ,  H04B10/16

CPC分类号： H04B10/1149

摘要： A repeater for packet data optical communication between terminal devices includes a first section and a second section. The first section includes a first device for receiving a first optical signal transmitted from a terminal device and for converting the first optical signal into a first electric signal, a second device for frequency-converting the first electric signal to a second electric signal, and a third device for converting the second electric signal into a second optical signal and for transmitting the second optical signal. The second section includes a fourth device for receiving a third optical signal and for converting the third optical signal into a third electric signal, a fifth device for frequency-converting the third electric signal to a fourth electric signal, and a sixth device for converting the fourth electric signal into a fourth optical signal and for transmitting the fourth optical signal to a terminal device.

摘要翻译： 用于终端设备之间的分组数据光通信的中继器包括第一部分和第二部分。 第一部分包括用于接收从终端装置发送的第一光信号并将第一光信号转换为第一电信号的第一装置，用于将第一电信号频率转换为第二电信号的第二装置，以及 第三装置，用于将第二电信号转换成第二光信号并用于发送第二光信号。 第二部分包括用于接收第三光信号并将第三光信号转换为第三电信号的第四装置，用于将第三电信号频率转换为第四电信号的第五装置，以及用于转换第三电信号的第六装置 第四电信号转换成第四光信号，并将第四光信号发送到终端装置。

公开(公告)号：US5349463A

公开(公告)日：1994-09-20

申请号：US68572

申请日：1993-05-28

申请人： Kazutoshi Hirohashi ,  Hiroshi Horii ,  Hideo Koike ,  Yoshiaki Yunoki ,  Tetsuo Fukasawa ,  Susumu Katayama ,  Akio Yoshikawa ,  Keishi Ushijima ,  Takaaki Takeda ,  Takeshi Nomoto ,  Michio Kikuta ,  Shunichi Shichijo ,  Yoshiki Iwasaki

发明人： Kazutoshi Hirohashi ,  Hiroshi Horii ,  Hideo Koike ,  Yoshiaki Yunoki ,  Tetsuo Fukasawa ,  Susumu Katayama ,  Akio Yoshikawa ,  Keishi Ushijima ,  Takaaki Takeda ,  Takeshi Nomoto ,  Michio Kikuta ,  Shunichi Shichijo ,  Yoshiki Iwasaki

IPC分类号： H04B10/10 ,  H04B10/00 ,  H04B10/16

CPC分类号： H04B10/1149

摘要： An optical radio system includes a host device, an end device, and a repeater. The host device and the end device communicate with each other via the repeater by use of optical radio. The repeater includes a section for receiving a first light signal from one of the host device and the end device, a section for converting the received first light signal into a first electric signal, a section for frequency-converting the first electric signal into a second electric signal, and a section for generating a second light signal in response to the second electric signal and transmitting the generated second light signal. The repeater also includes a section for demodulating one of the first electric signal and the second electric signal into a baseband signal, a section for detecting a quality of the baseband signal, and a section for enabling transmission of the second light signal only when the detected quality of the baseband signal is equal to or greater than a predetermined quality.

摘要翻译： 光无线电系统包括主机设备，终端设备和中继器。 主机设备和终端设备通过中继器通过使用光无线电相互通信。 中继器包括用于从主机设备和终端设备之一接收第一光信号的部分，用于将接收的第一光信号转换为第一电信号的部分，用于将第一电信号频率转换为第二电信号的部分 电信号和用于响应于第二电信号产生第二光信号并发送所生成的第二光信号的部分。 中继器还包括用于将第一电信号和第二电信号中的一个解调为基带信号的部分，用于检测基带信号的质量的部分，以及仅在检测到的基带信号时能够传输第二光信号的部分 基带信号的质量等于或大于预定质量。