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1. 发明授权

US4335464A Dual multipoint data transmission system modem 失效
标题翻译：双重多点数据传输系统调制解调器
公开(公告)号：US4335464A
公开(公告)日：1982-06-15
申请号：US115118
申请日：1980-01-24
申请人： Thomas R. Armstrong , Gordon Bremer , William Betts
发明人： Thomas R. Armstrong , Gordon Bremer , William Betts
IPC分类号： H04J1/08 , H04J1/18
CPC分类号： H04J1/08
摘要： A modem is provided which allows two independent sets of multipoint users to share a common communication media such as a telephone channel. At each site there is provided a modem which transmits and receives two independent frequency division multiplexed data streams simultaneously over a common telephone channel. Each data stream is encoded into an eight phase PSK or QAM signal. One data stream signal is transmitted in a low frequency range and the second is transmitted in a high frequency range. Means are provided at each site to combine the data streams for transmission over a single communication line and to separate the received combined signal from the communication line.
摘要翻译：提供了允许两个独立的多点用户组共享诸如电话信道的通用通信媒体的调制解调器。在每个站点，提供了一个调制解调器，其通过公共电话信道同时发送和接收两个独立的频分多路复用数据流。每个数据流被编码成八相PSK或QAM信号。一个数据流信号在低频范围内传输，第二个在高频范围内传输。在每个站点处提供装置以组合用于在单个通信线路上传输的数据流，并将接收到的组合信号与通信线路分离。

2. 发明授权

US4516216A In-service monitoring system for data communications network 失效
标题翻译：数据通信网络在线监控系统
公开(公告)号：US4516216A
公开(公告)日：1985-05-07
申请号：US376741
申请日：1982-05-10
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： H04L12/26 , H04B3/14
CPC分类号： H04L43/00 , H04L12/2602 , H04L43/0829 , H04L43/087
摘要： A data communications network is provided in which communications equipment at separated locations are provided with auxiliary processing equipment. The communications equipment is interfaced with the auxiliary processing equipment by means of an analog interface, digital interface and a high speed data bus. The auxiliary processing equipment permits the non-interfering monitoring of the status of the entire network including the communications equipment, data terminal connected to the communications equipment and communications media interconnecting the communications equipment.
摘要翻译：提供了一种数据通信网络，其中在分离位置的通信设备设置有辅助处理设备。通信设备通过模拟接口，数字接口和高速数据总线与辅助处理设备接口。辅助处理设备允许对包括通信设备，连接到通信设备的数据终端和互连通信设备的通信介质的整个网络的状态进行非干扰监视。

3. 发明授权

US4381546A System for the quantitative measurement of impairments in the communication channel of a quadrature amplitude modulation data communication system 失效
标题翻译：用于定量测量正交幅度调制数据通信系统通信信道中的损伤的系统
公开(公告)号：US4381546A
公开(公告)日：1983-04-26
申请号：US16912
申请日：1979-03-02
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： H04L1/20 , H04L27/38 , H04B3/14
CPC分类号： H04L1/206 , H04L27/38
摘要： A system is provided for measuring communication channel impairments in a data transmitting system which employs quadrature amplitude modulation. The system rotates each point of sampled eye diagram information by a phase angle determined by the ideal value of the received point information so that the rotated point has its nominally maximum component on the real axis.
摘要翻译：提供了一种用于测量采用正交幅度调制的数据传输系统中的通信信道损伤的系统。系统将采样的眼图信息的每个点旋转由接收点信息的理想值确定的相位角，使得旋转点在实轴上具有其名义上的最大分量。

4. 发明授权

US4273955A System for in-service quantitative performance analysis of data communications system 失效
标题翻译：数据通信系统在线定量性能分析系统
公开(公告)号：US4273955A
公开(公告)日：1981-06-16
申请号：US17041
申请日：1979-03-02
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： H04L1/24 , H04L5/06 , G06F11/00 , H04B1/72 , H04J1/10 , H04M1/24
CPC分类号： H04L5/06 , H04L1/24
摘要： A data communication system is provided comprising, at a plurality of locations, data terminal equipment. Communication equipment adapted to transmit and/or receive data from location to location is provided at each location connected to the terminal equipment and interconnected between locations through a suitable communications channel or media. An auxiliary signal processor is provided at each location interfaced with the communications equipment and deriving from the communications equipment on a noninterfering basis, information relating to the status of the channel, communications equipment, and data terminal equipment. A central controller is provided at a central location and auxiliary communication equipment is provided at each location interconnected with the central controller and with the auxiliary signal processor.
摘要翻译：提供一种数据通信系统，其包括在多个位置处的数据终端设备。适用于从位置到位置发送和/或接收数据的通信设备被提供在连接到终端设备的每个位置处，并且通过合适的通信信道或介质在位置之间互连。在与通信设备连接的每个位置处提供辅助信号处理器，并且在非干扰的基础上从通信设备导出与信道的状态，通信设备和数据终端设备有关的信息。中央控制器设置在中央位置，并且在与中央控制器和辅助信号处理器互连的每个位置处提供辅助通信设备。

5. 发明授权

US4627077A Modified QAM data point constellation for secondary channel signalling 失效
标题翻译：用于辅助信道信令的修改的QAM数据点星座
公开(公告)号：US4627077A
公开(公告)日：1986-12-02
申请号：US677509
申请日：1984-12-03
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： H04B17/00 , H04L27/34 , H03C5/00 , H04L27/00
CPC分类号： H04L27/3472 , H04B17/0087
摘要： A method of adding a secondary channel to a QAM signal mapped in the complex plane is provided. A pair of positions in the mapped complex plane is determined such that the positions are equi-distant from the origin and no greater from the origin than the distance from the origin to the position of the furthest mapped data point. For secondary channel communication, a data point is shifted from a normal mapped position to one or the other of the new positions with one of said positions assuming a binary "1" for the secondary channel and the other of said positions assuming a binary "0".
摘要翻译：提供了将辅助信道添加到映射在复平面中的QAM信号的方法。确定映射的复平面中的一对位置，使得位置距离原点等距离，而不是距原点的距离远离最远映射数据点的原点到位置。对于二次通道通信，数据点从正常映射位置移位到新位置中的一个或另一个，其中一个所述位置假设二次通道为二进制“1”，而另一个位置假设二进制“0” “。

6. 发明授权

US4558317A Digital communication link monitoring device 失效
标题翻译：数字通信链路监控设备
公开(公告)号：US4558317A
公开(公告)日：1985-12-10
申请号：US442317
申请日：1982-11-17
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： H04L1/24 , H04Q9/00 , G06F11/00 , H04J3/02
CPC分类号： H04L1/24
摘要： Digital transmission service offerings provided by common carriers are characterized by digital terminations at two or more user locations. The user has access only to the digital clock and data signals. A modem is described which when attached to the digital terminations provides three functions. First it allows the user to pass his data over the digital service channel. Second it measures the digital communication error rate and availability. Third it permits the user to pass a low speed telemetry channel over the digital service in addition to normal user data. The modem measures the digital channel bit error rate and provides a secondary or side channel without interfering with the transmission of normal data.
摘要翻译：由普通运营商提供的数字传输服务产品的特征在于两个或多个用户位置处的数字终端。用户只能访问数字时钟和数据信号。描述了当连接到数字终端时提供三种功能的调制解调器。首先，它允许用户通过数字服务通道传递他的数据。第二，它测量数字通信错误率和可用性。第三，除了正常的用户数据之外，它允许用户通过数字服务的低速遥测信道。调制解调器测量数字信道误码率，并提供辅助或侧信道，而不会干扰正常数据的传输。

7. 发明授权

US4374436A System for the monitoring and restoration of series terminals in a looped communication system 失效
标题翻译：用于在循环通信系统中监视和恢复串行终端的系统
公开(公告)号：US4374436A
公开(公告)日：1983-02-15
申请号：US198234
申请日：1980-10-17
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： G06F11/00 , H04L12/437 , G06F11/20
CPC分类号： H04L12/437
摘要： A loop architecture modification is provided along with a monitoring and control device for unidirectional loop architecture such that failed terminals or loop interconnections may be detected and such that corrective actions may be automatically or manually taken to restore operation to the remaining terminals in the loop.
摘要翻译：提供了环路架构修改以及用于单向环路架构的监视和控制设备，使得可以检测到故障终端或环路互连，并且可以自动或手动地采取校正动作来恢复对循环中的其余终端的操作。

8. 发明授权

US4271527A Double side band-quadrature carrier modulation signal structures 失效
标题翻译：双边带正交载波调制信号结构
公开(公告)号：US4271527A
公开(公告)日：1981-06-02
申请号：US71734
申请日：1979-08-31
申请人： Thomas R. Armstrong
发明人： Thomas R. Armstrong
IPC分类号： H04L27/38 , H04L27/34 , H04L3/00
CPC分类号： H04L27/3411
摘要： An improved method is provided for the complex plane mapping of the signal structure constellation for double side band quadrature carrier modulation. All points are mapped in an N.times.N constellation having 90.degree. symmetry about the origin. All points in excess of 2.sup.M and any point appearing at origin are omitted. Any point, in each quadrant further spaced from the origin than any other point in that quadrant are relocated. "N" and "M" are integers.
摘要翻译：提供了一种用于双边带正交载波调制的信号结构星座的复平面映射的改进方法。所有的点被映射在关于原点的90°对称的N×N星座中。超过2M的所有点和出现在原点的任何点都被省略。任何一点，在每个象限中，与原点相比，在该象限中的任何其他点进一步间隔重新定位。 “N”和“M”是整数。

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