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公开(公告)号：US3748395A
公开(公告)日：1973-07-24
申请号：US3748395D
申请日：1970-06-02
Applicant: INT STANDARD ELECTRIC CORP
Inventor： HERTER E
CPC classification number: H04Q3/42 , H04M1/515 , H04M3/2272 , H04Q1/38 , H04Q3/00
Abstract: A resistor network is connected to a two wire line and used to detect and overcome changes of direct current levels without disturbing any alternating current signals superimposed thereon. Direct connections between the d.c. source and the network eliminate the effects of any fluctuations in the source voltage. The invention has general utility wherever changes in d.c. levels must be detected; however, a particular use of the invention is to compensate for longitudinal voltages induced on a telephone line.
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2.发明授权
公开(公告)号：US3710027A
公开(公告)日：1973-01-09
申请号：US3710027D
申请日：1970-10-27
Applicant: INT STANDARD ELECTRIC CORP
CPC classification number: H04B7/2125
Abstract: A system at each station is described to detect the beginning of a message first containing a start signal and to detect the station address in a TDMA system. The system stores detected suspected signals for a number of preceding frames that occur in an expected time slot. A first majority decision is made with respect to the stored start signal and if a positive decision is made the next detected start signal is accepted for processing. A positive decision for the start signal majority decision enables the station addresses to be evaluated by a second majority decision. This arrangement eliminates the need of redundancy codes for the start signal and the station address, said redundancy codes occupying too much space in the available time slot.
Abstract translation: 描述每个站处的系统以检测首先包含起始信号的消息的开始并检测TDMA系统中的站地址。 系统存储在期望时隙中出现的多个先前帧的检测到的可疑信号。 对于所存储的起始信号做出第一个多数决定，并且如果作出肯定的决定，接下来检测到的起始信号用于处理。 开始信号多数决定的积极决定使得能够通过第二个多数决定来评估站地址。 这种布置消除了对起始信号和站地址的冗余码的需要，所述冗余码在可用时隙中占据太多的空间。
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3.发明授权System for controlling the transmit time of stations which are in communication with one another via a satellite 失效用于通过卫星与其他另一个通信的站的发送时间的控制系统
公开(公告)号：US3787634A
公开(公告)日：1974-01-22
申请号：US3787634D
申请日：1972-10-13
Applicant: INT STANDARD ELECTRIC CORP
CPC classification number: H04B7/2126
Abstract: This relates to timing control of message bursts in a TDMA communication satellite system. Each ground station stores information as to both its time slot of transmission and duration of transmission as determined by a master station. The timing control is derived by comparing the received timing information with the stored timing information. When a difference is detected, the transmit timing is altered as required to carry on communication and maintain complete frame fill even when certain stations of the system are not involved in communication.
Abstract translation: 这涉及TDMA通信卫星系统中消息突发的定时控制。 每个地面站都存储关于发送时隙和由主站确定的发送持续时间的信息。 通过将接收到的定时信息与所存储的定时信息进行比较来得出定时控制。 当检测到差异时，即使在系统的某些站不涉及通信的情况下，发送定时根据需要被改变以进行通信并保持完整的帧填充。
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