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91. 发明授权

US5841776A Apparatus and method for a high throughput fiber-optic access network using code division multiple access 失效
标题翻译：一种使用码分多址的高吞吐量光纤接入网的装置和方法
公开(公告)号：US5841776A
公开(公告)日：1998-11-24
申请号：US581700
申请日：1995-12-29
申请人： Howard Zehua Chen
发明人： Howard Zehua Chen
IPC分类号： H04J14/00 , H04L12/56 , H04L27/10 , H04Q11/04 , H04J13/00
CPC分类号： H04L27/10 , H04J14/005 , H04Q11/0478 , H04L2012/5616 , H04L2012/5675
摘要： A method and apparatus for implementation of a code division multiple access encoding scheme in a fiber-optic network. One preferred embodiment of the present invention provides an encoder and decoder for each terminal in the communications network, for example SONET OC-3, and allows each terminal to transmit their signals into the fiber-optic network at random. Because no time slot management is used, signals from all terminals interfere with one another. A coding technique is used by each decoder to sort its own signal out of this interference. The encoded data from each terminal is modulated with a technique known as MFSK (multiple frequency shift keying). The modulated signal is further used to intensity-modulate a semiconductor laser diode which may or may not be a single wavelength laser. At the receiver, the combined interference signal is first detected by a optical intensity detector and then sent to a frequency tone detectors which demodulate the MFSK signal. The output of the MFSK demodulator is then sent to a decoder where the original data bits are recovered. The network employs an optimum spread spectrum multiple access coding and modulation method that hops the subcarrier of a semiconductor laser diode over the entire range of DC -30 Ghz. Powerful concatenated Reed-Solomon outer, dual-K convolutional inner codes are used to minimize errors caused by mutual interference.
摘要翻译：一种用于在光纤网络中实现码分多址编码方案的方法和装置。本发明的一个优选实施例为通信网络中的每个终端（例如SONET OC-3）提供编码器和解码器，并且允许每个终端将它们的信号随机发送到光纤网络中。由于不使用时隙管理，来自所有终端的信号彼此干扰。每个解码器使用编码技术来对其自身的信号进行排序。来自每个终端的编码数据用称为MFSK（多频移键控）的技术进行调制。调制信号还用于强度调制半导体激光二极管，其可以是或不是单波长激光。在接收机处，组合干扰信号首先由光强度检测器检测，然后发送到解调MFSK信号的频率检测器。然后将MFSK解调器的输出发送到解码器，原始数据位被恢复。网络采用在DC -30 Ghz的整个范围内跳过半导体激光二极管的副载波的最佳扩频多址编码和调制方法。强大的串联Reed-Solomon外部双K卷积内码用于最大限度地减少相互干扰造成的误差。

92. 发明授权

US5790555A Signal multiplexer and multiplexing method 失效
标题翻译：信号多路复用和复用方法
公开(公告)号：US5790555A
公开(公告)日：1998-08-04
申请号：US663278
申请日：1996-06-07
申请人： Shoichi Narahashi , Ken Kumagai , Toshio Nojima , Yoshiaki Tarusawa
发明人： Shoichi Narahashi , Ken Kumagai , Toshio Nojima , Yoshiaki Tarusawa
IPC分类号： H03G3/30 , H04B1/04 , H04J1/00 , H04J1/06 , H04J1/16 , H04J1/20 , H04L5/06 , H04L27/10 , H04L27/12 , H04L27/26
CPC分类号： H04J1/06 , H03G3/30 , H03G3/3042 , H04J1/065 , H04J1/16 , H04J1/20 , H04L27/10 , H04L27/12 , H04L5/06 , H04L27/2621
摘要： The frequencies of input modulated signals fed via ports 11.sub.1 to 11.sub.n are converted by frequency converting parts 12.sub.1 to 12.sub.n to different bands, and the converted outputs are applied to power combining part 24 decides if 16 via variable attenuators 21.sub.1 to 21.sub.n, respectively, and provided therefrom as a multiplexed output a portion of which is branched. The envelope power level L is detected by level detecting part 23. Control with the detected level L exceeds a level L.sub.s that is k times the average power of the multiplexed signal k being about 4 to 5, and controls the attenuators 21.sub.1 to 21.sub.n to attenuate the average power of the modulated signal by k/n-fold or less for about 1/.DELTA.F.sub.0 (sec), where (.DELTA.F.sub.0 �Hz! is the frequency bandwidth of the multiplexed signal.
摘要翻译： PCT No.PCT / JP95 / 02467 Sec。 371日期1996年6月7日第 102（e）日期1996年6月7日PCT 1995年12月4日PCT PCT。公开号WO96 / 18249 日期1996年6月13日经由端口111至11n馈送的输入调制信号的频率由频率转换部分121至12n转换为不同频带，并且转换后的输出被施加到功率合成部分24通过可变衰减器211至21n判定16 ，并作为其一部分分支的多路复用输出。包络功率电平L由电平检测部23检测。具有检测电平L的控制超过多路复用信号k的k倍的k倍的电平Ls为约4〜5，并且控制衰减器211〜21n衰减对于约1 / DELTA F0（sec），调制信号的平均功率为k / n倍或更小，其中（DELTA F0 [Hz]是多路复用信号的频率带宽）。

93. 发明授权

US5363409A Method and system for multiplexed data transmission from hazardous environments 失效
标题翻译：从危险环境中复用数据传输的方法和系统
公开(公告)号：US5363409A
公开(公告)日：1994-11-08
申请号：US818638
申请日：1992-01-06
申请人： Robert J. Desilets
发明人： Robert J. Desilets
IPC分类号： H04L27/10
CPC分类号： H04L27/10
摘要： A three frequency system employs frequency shift keying (FSK) to transmit digital data from a plurality of non-stationary objects such as fuel trucks connectable to a plurality of transmit locations such as fuel pumps in a hazardous environment to a "safe area" computer. The three different frequencies are transmitted respectively as three pulses of different frequencies. Two of the three different pulse frequencies respectively represent a binary "one" and a binary "zero" whereas the third different frequency represents a "synchronization" or "start of message" signal which in a preferred embodiment causes the "safe area" computer receiving two consecutive pulses representative of the synchronization frequency from a particular transmit location as it cyclically interrogates the transmit locations to have an "interrupt" signal sent to its central processing unit (CPU) whereupon the central processing unit interrupts the task which it is performing to listen to at least one transmission of the entire two frequency binary "ones" and "zeros" message, the "safe area" computer having been programmed to recognize various sequential locations in the two frequency message as representative of such data as vehicle identification number, fleet identification number, type of fuel requested, etc.
摘要翻译：三频系统采用频移键控（FSK）从多个非静止物体传输数字数据，例如在危险环境中可连接到诸如燃油泵的多个发射位置的燃料卡车到“安全区域”计算机。三个不同的频率分别以不同频率的三个脉冲发送。三个不同脉冲频率中的两个分别表示二进制“一”和二进制“零”，而第三不同频率表示“同步”或“消息开始”信号，其在优选实施例中使得“安全区域”计算机接收两个连续脉冲表示来自特定发射位置的同步频率，因为它周期性地询问发射位置以具有发送到其中央处理单元（CPU）的“中断”信号，于是中央处理单元中断正在执行的任务以监听对于整个两个频率二进制“1”和“零”消息的至少一个传输，已经被编程为将两个频率消息中的各种顺序位置识别为诸如车辆识别号码，车队的数据的“安全区域”计算机识别号码，所需燃料类型等。

94. 发明授权

US5351249A Trellis coded FM digital communications system and method 失效
标题翻译：格码编码FM数字通信系统和方法
公开(公告)号：US5351249A
公开(公告)日：1994-09-27
申请号：US732200
申请日：1991-07-19
申请人： Gary R. Lomp , Donald L. Schilling
发明人： Gary R. Lomp , Donald L. Schilling
IPC分类号： H03M13/25 , H04L1/00 , H04L27/10 , G06F11/10
CPC分类号： H04L1/0059 , H03M13/25 , H03M13/256 , H04L1/0041 , H04L1/0045 , H04L1/006 , H04L27/10
摘要： A method and apparatus for encoding and convolutionally decoding a data word of a data word sequence. Each data word has k bits. An encoder selects, using a trellis encoding algorithm and a previous data word, a 2.sup.k subset of signal points from a square set of M by M signal points having X coordinates and Y coordinates. The square set of M by M signal points includes a constellation of 2.sup.k+l signal points. The encoder selects, using the data word, a signal point from the selected subset of signal points. A modulator generates a first frequency-shift-keying (FSK) signal and a second FSK signal from the selected signal point. A demodulator demodulates the first FSK signal as a received X coordinate and the second FSK signal as a received Y coordinate. A decoder estimates, using a second processor, a 2.sup.k received subset of signal points using the convolutionally decoding algorithm and a previously received data word. The decoder estimates a received data word from the received X coordinate, the received Y coordinate, and the estimated-received subset of signal points.
摘要翻译：一种用于对数据字序列的数据字进行编码和卷积解码的方法和装置。每个数据字都有k位。编码器使用网格编码算法和先前的数据字，从具有X坐标和Y坐标的M个信号点的平方M集合中选择信号点的2k个子集。 M个M个信号点的平方集包括2k + 1个信号点的星座。编码器使用数据字从所选择的信号点子集中选择一个信号点。调制器从所选择的信号点产生第一频移键控（FSK）信号和第二FSK信号。解调器将第一FSK信号解调为接收的X坐标，将第二FSK信号解调为接收的Y坐标。解码器使用卷积解码算法和先前接收的数据字来估计使用第二处理器的2k个信号点的接收子集。解码器从接收到的X坐标，接收的Y坐标和估计接收的信号点子集估计接收的数据字。

95. 发明授权

US5345473A Apparatus for providing two-way communication in underground facilities 失效
标题翻译：用于在地下设施中提供双向通信的装置
公开(公告)号：US5345473A
公开(公告)日：1994-09-06
申请号：US123691
申请日：1993-09-17
申请人： Antti Berg
发明人： Antti Berg
IPC分类号： H04B5/00 , H04L27/10 , H04B13/02 , H04B1/44
CPC分类号： H04B5/0018 , H04B5/02 , H04L27/10
摘要： The invention relates to an apparatus which is desiged for underground use in order to facilitate a two-way communication. The apparatus is operated within the frequency band 0.1-2 MHz, in order to make the electromagnetic waves propagate advantageously by utilizing the metal structures installed in the underground facilities and the bedrock itself. According to the invention, the transmitter/receiver unit is provided with an analog to digital converter (5) and respectively a digital to analog converter (20) in order to transmit the intermediate signal coded in digital form in between the two units of the apparatus.
摘要翻译：本发明涉及一种用于地下使用的装置，以便于双向通信。该装置在0.1-2MHz的频带内工作，以便通过利用安装在地下设施中的金属结构和基岩本身来有利地传播电磁波。根据本发明，发射机/接收机单元设置有模数转换器（5）和分别为数模转换器（20），以便将以数字形式编码的中间信号发送到设备的两个单元之间。

96. 发明授权

US5289500A Signal conditioner 失效
标题翻译：信号调理器
公开(公告)号：US5289500A
公开(公告)日：1994-02-22
申请号：US779924
申请日：1991-10-21
申请人： Kiyoharu Inou , Yoshio Hasegawa , Kenji Fujino , Makoto Imamura , Takanori Komuro , Shunsuke Hayashi , Hitoshi Yasui
发明人： Kiyoharu Inou , Yoshio Hasegawa , Kenji Fujino , Makoto Imamura , Takanori Komuro , Shunsuke Hayashi , Hitoshi Yasui
IPC分类号： H04B3/54 , H04L27/10 , H04B3/46
CPC分类号： H04L27/10 , H04B3/548 , H04B2203/5416 , H04B2203/5458 , H04B2203/547 , H04B2203/5475 , H04B2203/5491 , H04B2203/5495
摘要： A signal conditioner comprising a receiving part, a transmitting part, and a power supply part, wherein the main functions of these components are digitalized and common circuit elements are used for different functions. Signal conditions may be of several different types, each of which is a hardware which can accommodate various transmitters and actuators.
摘要翻译：一种信号调理器，包括接收部分，发送部分和电源部分，其中这些部件的主要功能被数字化，并且公共电路元件用于不同的功能。信号条件可以是几种不同的类型，每种类型是可以容纳各种发射器和致动器的硬件。

97. 发明授权

US5274490A Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver 失效
标题翻译：光发射机，光接收机和光传输装置及光接收机的控制方法
公开(公告)号：US5274490A
公开(公告)日：1993-12-28
申请号：US693584
申请日：1991-04-30
申请人： Hideaki Tsushima , Shinya Sasaki
发明人： Hideaki Tsushima , Shinya Sasaki
IPC分类号： H04B10/142 , H04L25/49 , H04L27/10 , H04B10/04 , H04B10/06
CPC分类号： H04L25/4925 , H04B10/614 , H04L27/10
摘要： A unipolar original electrical signal is encoded by alternate mark inversion and combined with a DC bias current for injection of a semiconductor laser to produce a bipolar FSK optical signal that is transmitted to a receiver. At the receiver, the received signal is coupled with optical local power and fed to an optical/electrical transducer, preferably a semiconductor, to produce an electrical signal that is demodulated to produce the original unipolar signal. The demodulator may be of different types, for example employing delaying part of the amplified electrical signal and mixing the delayed part with the original signal for passage of the combined signal through a low pass filter; with proper selection of the delay, an AMI decoder is not needed. The demodulator may also be of the type that has one or more band pass filters to respectively separate the positive mark, space and negative mark signals that may thereafter be added. Filtering and polarization beam splitting may also be used in the demodulator for improving the signal-to-noise ratio and preventing other types of degradation.
摘要翻译：单极原始电信号通过交替标记反转编码，并与用于注入半导体激光器的DC偏置电流组合以产生传输到接收器的双极性FSK光信号。在接收机处，所接收的信号与光学局部功率耦合，并被馈送到光/电换能器，优选地是半导体，以产生被解调以产生原始单极性信号的电信号。解调器可以是不同类型的，例如采用延迟部分放大的电信号，并将延迟部分与原始信号混合，以使组合信号通过低通滤波器; 通过适当选择延迟，不需要AMI解码器。解调器也可以是具有一个或多个带通滤波器的类型，以分别分离随后可能被添加的正标记，空格和负标记信号。滤波和偏振光束分离也可用于解调器中以改善信噪比并防止其它类型的降级。

98. 发明授权

US5023950A Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver 失效
标题翻译：光发射机，光接收机和光传输装置及光接收机的控制方法
公开(公告)号：US5023950A
公开(公告)日：1991-06-11
申请号：US298946
申请日：1989-01-19
申请人： Hideaki Tsushima , Shinya Sasaki
发明人： Hideaki Tsushima , Shinya Sasaki
IPC分类号： G02F2/00 , H01S5/06 , H04B10/07 , H04B10/40 , H04B10/50 , H04B10/516 , H04B10/548 , H04B10/60 , H04B10/61 , H04B10/64 , H04L25/49 , H04L27/10
CPC分类号： H04L25/4925 , H04B10/614 , H04L27/10
摘要： A unipolar original electrical signal is encoded by alternate mark inversion and combined with a DC bias current for injection of a semiconductor laser to produce a bipolar FSK optical signal that is transmitted to a receiver. At the receiver, the received signal is coupled with optical local power and fed to an optical/electrical transducer, preferably a semiconductor, to produce an electrical signal that is demodulated to produce the original unipolar signal. The demodulator may be of different types, for example employing delaying part of the amplified electrical signal and mixing the delayed part with the original signal for passage of the combined signal through a low pass filter; with proper selection of the delay, an AMI decoder is not needed. The demodulator may also be of the type that has one or more band pass filters to respectively separate the positive mark, space and negative mark signals that may thereafter be added. Filtering and polarization beam splitting may also be used in the demodulator for improving the signal-to-noise ratio and preventing other types of degradation.

99. 发明授权

US4868863A Apparatus for connecting data processing equipment to a communication network 失效
标题翻译：用于将数据处理设备连接到通信网络的装置
公开(公告)号：US4868863A
公开(公告)日：1989-09-19
申请号：US251157
申请日：1988-09-29
申请人： John D. Hartley , Mark Germain , Brian D. Key , Ray Jepson , Victor G. Golding , Steven Cook , Paul D. Maddison
发明人： John D. Hartley , Mark Germain , Brian D. Key , Ray Jepson , Victor G. Golding , Steven Cook , Paul D. Maddison
IPC分类号： H04M11/00 , H04L27/10 , H04L29/06 , H04M11/06
CPC分类号： H04M11/06 , H04L27/10 , Y10S379/912
摘要： Apparatus for connecting data processing equipment to a communications network includes hardware for a range of different communications standards. Also included is a coupler (preferably in the form of a cable) having a particular standard communications plug which contains an identifying code associated with that particular standard plug, which code is used to configure the apparatus to that particular standard. The apparatus contains a digital signal processor controlled by control code contained in a control store having associated therewith a standard identifier code. Control logic reads the standard identifier code associated with the control code and the standard identifying code in the coupler and enables the apparatus if the two match (or disables if they do not match). The control store can either contain only the code associated with a particular standard or it can contain all the code for a range of standards: in the latter case the control logic would allow the signal processor to access only the sections of the control store containing the relevant control code. The invention is particularly useful for connecting data processing equipment through a modem to different country telephone networks.
摘要翻译：用于将数据处理设备连接到通信网络的装置包括用于一系列不同通信标准的硬件。还包括具有特定标准通信插头的耦合器（优选地以电缆的形式），其包含与该特定标准插头相关联的识别代码，该代码用于将该装置配置到该特定标准。该装置包含由控制存储器中包含的与其相关联的标准标识符代码的控制代码控制的数字信号处理器。控制逻辑读取与耦合器中的控制代码和标准识别代码相关联的标准标识符代码，如果两者匹配（或者如果它们不匹配则使其不能使用）。控制存储器可以仅包含与特定标准相关联的代码，或者可以包含一系列标准的所有代码：在后一种情况下，控制逻辑将允许信号处理器仅访问控制存储器的包含相关控制代码。本发明特别适用于通过调制解调器将数据处理设备连接到不同的国家电话网络。

100. 发明授权

US4627078A Data communication system 失效
标题翻译：数据通信系统
公开(公告)号：US4627078A
公开(公告)日：1986-12-02
申请号：US606916
申请日：1984-05-04
申请人： Donald L. Stoner
发明人： Donald L. Stoner
IPC分类号： H04L27/10
CPC分类号： H04L27/10
摘要： A system for communicating digital data over a limited bandwidth transmission link, including a transition detector for detecting transitions in the binary logic state of an input digital signal and generating a transition indicator signal in response thereto; a frequency-shift key responsive to the transition indicator signal for generating a frequency-shift keyed signal to be transmitted over the link corresponding to the logic states of the input digital signal, the frequency-shift keyed signal comprised of substantially one cycle of a high-frequency signal for a bit at one logic state and substantially one-half cycle of a low-frequency signal for a bit at the other logic state; a zero-crossing detector for detecting zero-crossings of the frequency-shift keyed signal received over the link and generating a zero-crossing indicator signal; a frequency detector responsive to the zero-crossing signal for detecting the high-frequency and low-frequency signals of the frequency shift-keyed signal, and generating a frequency indicator signal; and a pulse generator responsive to the frequency indicator signal for generating an output digital signal corresponding to the input digital signal. A synchronizer synchronizes shifts between the high-frequency and low-frequency signals of the frequency-shift keyed signal with changes in the logic state of the digital signal. The frequency-shift key includes an oscillator for generating the high-frequency and low-frequency signals, and an oscillator reset for providing substantially in-phase signal shifts between the high-frequency and low-frequency signals of the frequency-shift keyed signal.
摘要翻译：一种用于在有限带宽传输链路上传送数字数据的系统，包括用于检测输入数字信号的二进制逻辑状态的转变的转换检测器，并响应于此产生转换指示符信号; 响应于转换指示符信号的频移键，用于产生要通过对应于输入数字信号的逻辑状态的链路发送的频移键控信号，该频移键控信号包括基本上一个高的周期在一个逻辑状态下的一位的频率信号和在另一个逻辑状态下的位的低频信号的大致一半周期; 用于检测通过链路接收的频移键控信号的过零点并产生过零指示符信号的过零检测器; 响应于过零信号的频率检测器，用于检测频移键控信号的高频和低频信号，并产生频率指示信号; 以及响应于频率指示器信号的脉冲发生器，用于产生对应于输入数字信号的输出数字信号。同步器通过数字信号的逻辑状态的变化来同步频移键控信号的高频和低频信号之间的移位。频移键包括用于产生高频和低频信号的振荡器，以及用于在频移键控信号的高频和低频信号之间提供基本上同相的信号移位的振荡器复位。

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