公开(公告)号：US20100064050A1

公开(公告)日：2010-03-11

申请号：US12514844

申请日：2007-11-14

申请人： Kenichi Maruhashi ,  Shuya Kishimoto

发明人： Kenichi Maruhashi ,  Shuya Kishimoto

IPC分类号： G06F13/00 ,  H04B10/10 ,  H04B10/105 ,  H04B10/22 ,  H04M3/42

CPC分类号： H04L67/28 ,  H04L67/2842 ,  H04L67/289 ,  H04W12/06

摘要： To reduce time to point a directional wireless portable terminal (WPT) to an access point (AP) when data is downloaded from the AP to the WPT, a user points the WPT to the AP, performs a first operation and transmits a request of authentication and download to the AP. The AP requests a server to perform the authentication and the download. The server transmits information on a current situation to the AP. The AP calculates time required until the download can be started based on content capacity and the like and transmits information on the calculated time to the WPT. The WPT displays countdown until the download can be started. During that time, the server performs the authentication and, if successful, delivers content to the AP. When the download can begin, the user performs a second operation and transmits a request of re-authentication and download to the AP.

摘要翻译： 为了在数据从AP下载到WPT时减少定向无线便携式终端（WPT）到接入点（AP）的时间，用户将WPT指向AP，执行第一操作并发送认证请求 并下载到AP。 AP请求服务器执行认证和下载。 服务器将当前情况的信息发送给AP。 AP计算基于内容容量等开始下载的时间，并将计算出的时间的信息发送给WPT。 WPT显示倒计时，直到下载开始。 在此期间，服务器执行身份验证，如果成功，则向AP提供内容。 当下载开始时，用户执行第二操作，并向AP发送重新认证和下载的请求。

公开(公告)号：US20080013963A1

公开(公告)日：2008-01-17

申请号：US11772879

申请日：2007-07-03

申请人： Hitoshi Naoe ,  Fumihiro Fukae ,  Koji Sakai ,  Shohei Ohsawa

发明人： Hitoshi Naoe ,  Fumihiro Fukae ,  Koji Sakai ,  Shohei Ohsawa

IPC分类号： H03K5/125 ,  H04B10/10 ,  H04B10/105 ,  H04B10/22

CPC分类号： H03K5/1252 ,  H04B10/1121 ,  H04B10/1141 ,  H04L7/04

摘要： The demodulation circuit of the present invention is a demodulation circuit, connected with a plurality of light-receiving sections each for receiving an optical signal and converting the signal into a binary pulse signal, operable to select and demodulate a pulse signal out of pulse signals that are supplied from the light-receiving sections, respectively, the demodulation circuit including: a judgment and selection section for detecting timing with which High level and Low level of each of the pulse signals are switched and for selecting at least one pulse signal based on the timing; and a demodulation section for demodulating the pulse signal selected by the judgment and selection section. Consequently, the demodulation circuit easily selects and demodulates a signal whose jitter component is small out of a plurality of supplied signals.

摘要翻译： 本发明的解调电路是一个解调电路，与多个光接收部分连接，每个光接收部分用于接收光信号并将信号转换为二进制脉冲信号，可操作以从脉冲信号中选出和解调出脉冲信号， 分别从光接收部分提供解调电路，该解调电路包括：判断和选择部分，用于检测每个脉冲信号的高电平和低电平被切换的定时，并且用于基于该信号选择至少一个脉冲信号 定时; 以及解调部分，用于解调由判断和选择部分选择的脉冲信号。 因此，解调电路容易地从多个提供的信号中选择并解调其抖动分量小的信号。

公开(公告)号：US06912075B1

公开(公告)日：2005-06-28

申请号：US09313428

申请日：1999-05-17

申请人： Stanislav I. Ionov ,  George C. Valley

发明人： Stanislav I. Ionov ,  George C. Valley

IPC分类号： H04B10/00 ,  H04B10/105

CPC分类号： H04B10/118

摘要： A node for satellite system communications between a ground station and a satellite includes a fiber optic bus on the satellite. An optical drop is coupled to the bus. The optical drop resolves an optical signal destined to the given satellite from the optical bus. An uplink and downlink receive and transmit communications from a ground terminal. A router is coupled to the optical drop and the uplink and downlink. An address reader and a table are used by the router to determine the destination of the received RF signals. The received RF signals are converted to optical signals by an optical source. The optical source has a wavelength that corresponds with the destination satellite. The optical signals are transmitted to an adjacent satellite by an optical transmitter such as a transmitting telescope.

摘要翻译： 地面站与卫星之间的卫星系统通信节点包括卫星上的光纤总线。 光滴连接到总线。 光学液滴从光学总线中分辨去往给定卫星的光学信号。 上行链路和下行链路从接地终端接收和发送通信。 路由器耦合到光滴和上行链路和下行链路。 路由器使用地址读取器和表来确定接收的RF信号的目的地。 所接收的RF信号由光源转换成光信号。 光源具有与目的地卫星相对应的波长。 光信号通过诸如发射望远镜的光发射机发射到相邻的卫星。

公开(公告)号：US6154297A

公开(公告)日：2000-11-28

申请号：US818690

申请日：1997-03-19

申请人： Joel I. Javitt ,  Christopher L. Rutledge

发明人： Joel I. Javitt ,  Christopher L. Rutledge

IPC分类号： H04B10/10 ,  H04B10/105 ,  H04B10/22 ,  H04B10/00

CPC分类号： H04B10/11

摘要： An optical transceiver that is particularly adapted for free-space optical telecommunication uses the same optical path for received and transmitted light to a large extent to avoid duplication of optical elements. Received light is split so that different portions can be sent to physically spaced photodetectors, one of which is for detecting optically received information, and others of which are for detecting misalignment of the transceiver. In this way, the alignment detectors do not interfere with light reception by the information detector.

摘要翻译： 特别适用于自由空间光通信的光收发器在很大程度上对接收和发射光使用相同的光路以避免光学元件的重复。 接收的光被分离，使得不同的部分可以被发送到物理间隔的光电探测器，其中一个用于检测光学接收的信息，并且其他的部分用于检测收发器的未对准。 以这种方式，对准检测器不会妨碍信息检测器的光接收。

公开(公告)号：US6111677A

公开(公告)日：2000-08-29

申请号：US144007

申请日：1998-08-31

申请人： Peter Rae Shintani ,  Hirofumi Usui

发明人： Peter Rae Shintani ,  Hirofumi Usui

IPC分类号： H04B10/10 ,  H04B10/105 ,  H04B10/22 ,  H04L12/28 ,  H04Q9/00 ,  H04Q9/14 ,  H04B10/00

CPC分类号： H04L12/282 ,  H04B10/114 ,  H04B10/1141 ,  H04L12/2805 ,  G08C2201/40 ,  H04L2012/2841

摘要： The present invention is a method and apparatus for controlling a device by a remote controller. A receiving unit receives a first signal emitted by the remote controller and converts the received signal into a data stream. A communication medium carries the data stream from the receiving unit. A transmitting unit receives the data stream from the communication medium and converts the received data stream into a second signal compatible with the device.

摘要翻译： 本发明是一种通过遥控器控制设备的方法和装置。 接收单元接收由遥控器发射的第一信号并将接收到的信号转换为数据流。 通信介质承载来自接收单元的数据流。 发送单元从通信介质接收数据流，并将接收到的数据流转换成与设备兼容的第二信号。

公开(公告)号：US6043920A

公开(公告)日：2000-03-28

申请号：US905760

申请日：1997-08-04

申请人： Raymond Joseph Leopold ,  Kenneth Maynard Peterson ,  Keith Andrew Olds

发明人： Raymond Joseph Leopold ,  Kenneth Maynard Peterson ,  Keith Andrew Olds

IPC分类号： H01S3/10 ,  G02B23/00 ,  H04B10/00 ,  H04B10/10 ,  H04B10/105 ,  H04B10/22 ,  H04B10/04

CPC分类号： H04B10/11

摘要： A laser transmitter (200, 300) includes a femptosecond pulse forming circuit (214, 308) and an ultra high-speed optical switch (218, 304) which enable the transmitter (200, 300) to generate a modulated pulse stream having pulses with widths of under 200 femptoseconds. The transmitted pulse stream is processed by a laser detector (500), including a wideband optical detector (504) and pulse stretching circuit (506), that regenerates information included in the modulated pulse stream.

摘要翻译： 激光发射器（200,300）包括飞秒脉冲形成电路（214,308）和超高速光开关（218,304），其使得发射机（200,300）能够产生具有脉冲的调制脉冲流 宽度不超过200飞秒。 所发射的脉冲流由激光检测器（500）处理，包括宽带光学检测器（504）和脉冲延伸电路（506），其重新产生包含在调制脉冲流中的信息。

公开(公告)号：US6031648A

公开(公告)日：2000-02-29

申请号：US847072

申请日：1997-05-01

申请人： Joel I. Javitt ,  Christopher L. Rutledge

发明人： Joel I. Javitt ,  Christopher L. Rutledge

IPC分类号： H04B10/02 ,  H04B10/10 ,  H04B10/105 ,  H04B10/148 ,  H04B10/18 ,  H04B10/22 ,  H04B10/00

CPC分类号： H04B10/60

摘要： Free-space optical transmission of analog information is facilitated by transmitting constant-amplitude pilot information with the other information. The amount of attenuation of the pilot information at the receiver is detected and used to control the amount by which received information is amplified. In this way the deleterious effects of free-space optical attenuation are substantially eliminated. The pilot information may be transmitted either via its own separate light frequency or wavelength, or as a distinguishable part of a larger quantity of information that is used to modulate one light frequency or wavelength.

摘要翻译： 通过将恒定幅度导频信息与其他信息进行传输，便于模拟信息的自由空间光传输。 检测接收机导频信息的衰减量，并用于控制接收信息被放大的量。 以这种方式，基本上消除了自由空间光衰减的有害影响。 导频信息可以经由其单独的光频率或波长或作为用于调制一个光频率或波长的较大量的信息的可区分部分来传输。

公开(公告)号：US5946118A

公开(公告)日：1999-08-31

申请号：US794509

申请日：1997-02-04

申请人： Paul A. Flaherty

发明人： Paul A. Flaherty

IPC分类号： H04B10/08 ,  H04B3/46 ,  H04B10/10 ,  H04B10/105 ,  H04B10/22 ,  H04L12/413 ,  H04J14/02

CPC分类号： H04L12/413

摘要： A method for communication includes transmitting a first datum using an electromagnetic wave of a first wavelength, and, while transmitting the first datum, detecting an energy level of an electromagnetic wave of a second wavelength. A collision is declared if the energy level of the second wavelength exceeds a threshold value.

摘要翻译： 一种通信方法包括使用第一波长的电磁波发送第一数据，并且在发送第一数据的同时，检测第二波长的电磁波的能级。 如果第二波长的能量水平超过阈值，则声明冲突。

公开(公告)号：US5914796A

公开(公告)日：1999-06-22

申请号：US722751

申请日：1996-10-01

申请人： Markku Selin

发明人： Markku Selin

IPC分类号： H04B10/10 ,  H04B10/105 ,  H04B10/22 ,  H04J14/08 ,  H04L12/28 ,  H04L29/08 ,  H04Q7/38 ,  H04B10/00

CPC分类号： H04B10/1143 ,  H04J14/08

摘要： The invention relates to a communication protocol with the aid of which a half-duplex type data transfer link is arranged between two devices, advantageously a mobile telephone (3) and a data adapter (2) in a computer (1). The link can be in a transfer mode, when data being transferred and control messages (CM) are passed between the devices, or an idle mode, when control messages (CM1, CM2, CM1', CM2') are passed between the devices. In idle mode the timing of the transmission of control messages is free and if two messages (CM1, CM2) collide, i.e. are transmitted simultaneously, they are re-transmitted (CM1', CM2') after time intervals of different duration. In transfer mode mobile telephone (3) regularly transmits a single frame (DATA) decoded by it and immediately before that a possible control message (CM). Data adapter (2) transmits a frame (DATA) every time it receives a frame transmitted by the mobile telephone and immediately after trans-mitting the frame transmits a possible control message (CM). A device can be switched into a sleep mode, in which it receives only for a short time (T2) at regular intervals (T1). A device in sleep mode can be woken up by a wake-up signal.

摘要翻译： 本发明涉及一种通信协议，借助于此，半双工型数据传输链路被布置在计算机（1）中的两个设备之间，有利地是移动电话（3）和数据适配器（2）之间。 当在设备之间传递控制消息（CM1，CM2，CM1'，CM2'）时，当传输数据和控制消息（CM）在设备之间传递时，链路可以处于传送模式。 在空闲模式下，控制消息传输的定时是空闲的，并且如果两个消息（CM1，CM2）冲突，即同时发送，则它们在不同持续时间的时间间隔之后重新发送（CM1'，CM2'）。 在传输模式中，移动电话（3）定期发送由其解码的单帧（DATA），并且紧接在可能的控制消息（CM）之前。 数据适配器（2）每当接收到由移动电话发送的帧并且在发送之后立即发送可能的控制消息（CM）时，发送帧（DATA）。 设备可以切换到休眠模式，其中它以规则的间隔（T1）仅接收短时间（T2）。 休眠模式下的设备可以通过唤醒信号唤醒。

公开(公告)号：US5909296A

公开(公告)日：1999-06-01

申请号：US833154

申请日：1997-04-04

申请人： Charles W. Tsacoyeanes

发明人： Charles W. Tsacoyeanes

IPC分类号： H04B10/10 ,  H04B10/105 ,  H04B10/00

CPC分类号： H04B10/11 ,  H04B10/118

摘要： Curved arrays of lasers cause discreet narrow infra-red light beams to be rapidly projected within a wide field of view, without requiring mechanical motion of components. Transmitted and received light beams can be modulated with data to be transmitted between light beam transceivers for covert data communication purposes, or without data for use in collision avoidance systems.

摘要翻译： 激光器的弯曲阵列使得谨慎的窄红外光束能够在宽视场内快速投影，而不需要组件的机械运动。 传输和接收的光束可以用数据在光束收发器之间进行调制，以进行隐蔽数据通信，或者不用于避免碰撞系统的数据。