公开(公告)号：US3752921A

公开(公告)日：1973-08-14

申请号：US3752921D

申请日：1970-11-04

Applicant: IBM

Inventor： AUDRETSCH L ,  ELSNER M

IPC: H04L5/04 ,  H04J1/00

CPC classification number: H04L5/04

Abstract: Signal sources overlay coded pulse signals on a tapped transmission cable, forming thereby composite signals of unique form. Source signals are representations of distinct words of an orthogonal, biorthogonal or transorthogonal code. Each source selectively transmits its assigned code signal or no signal in each of a series of isochronous time intervals. The source signals are adjusted in phase and amplitude to equalize delay and attenuation effects in relation to receiving terminals. Composite signals are handled further in a clipped digital form in which the intelligence of the composite is singularly retained. At receiving terminals the clipped composite is analyzed by digital matched filter circuits.

Abstract translation: 信号源在抽头传输电缆上叠加编码的脉冲信号，从而形成独特形式的复合信号。 源信号是正交，双正交或经正交码的不同字的表示。 每个源选择性地在一系列等时时间间隔中的每一个中选择性地发送其分配的码信号或不发送信号。 源极信号在相位和幅度上进行调整，以相对于接收端平衡延迟和衰减效应。 复合信号以复合数字形式进一步处理，其中复合物的智能被单独保留。 在接收终端，通过数字匹配滤波器电路分析限幅复合。

公开(公告)号：US3742452A

公开(公告)日：1973-06-26

申请号：US3742452D

申请日：1971-10-29

Applicant: IBM

Inventor： DERVAN J ,  ELSNER M ,  AUDRETSCH L ,  BLISS B ,  GRIFFITH L ,  THORPE R

IPC: G06F13/00 ,  H04L12/403 ,  H04J3/02

CPC classification number: H04L12/403

Abstract: Multiple terminals linked to one broadband cable in a sequence are interrogated by directionally coupled configuring signals and service polling signals. Configuring signals are utilized to permit selectively participating terminals to order themselves into service polling groups. Service polling signals offer successive terminals in a polling group exclusive access to a facility shared by all terminals of the group (e.g. time or frequency channel on the cable) which has not been seized by a preceding terminal of the group. Isochronal feedback shifting techniques are employed in the configuring and polling selection processes. Participating terminals progressively attach supplementary signals to the configuring and service polling signal trains ''''on-the-fly'''', without otherwise modifying or delaying the trains, by isochronally matching the signals of the passing train, extrapolating the supplementary signals and transmitting the supplementary signals immediately behind the end of the passing train through appropriate directional transmission coupling to the cable.

Abstract translation: 通过定向耦合的配置信号和服务轮询信号来询问以一个序列连接到一个宽带电缆的多个终端。 利用配置信号来允许有选择地参与的终端自己进入服务轮询组。 服务轮询信号在轮询组中提供连续终端，独占访问组中所有终端共享的设施（例如，电缆上的时间或频率信道），该组织尚未被该组的先前终端占用。 在配置和轮询选择过程中采用等时反馈移位技术。 参与终端通过等速匹配通过列车的信号，外推补充信号并立即发送补充信号，逐渐将辅助信号附加到配置和服务轮询信号列表上，而不用其他方式修改或延迟列车 通过适当的方向传输耦合到电缆后通过列车的末端。