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公开(公告)号：US5153764A
公开(公告)日：1992-10-06
申请号：US314761
申请日：1989-02-02
CPC分类号： H04J14/08 , H04B10/50 , H04J3/0682 , H04J14/02
摘要： A method and control system for controlling a signal from each outstation in a multiple access passive optical network including a central node and a plurality of outstations involves monitoring, at the exchange, the value of a parameter of a signal from reach outstation. The value of the parameter is monitored relative to a predetermined discrimination value to detect the signal relative to predetermined first and second reference values defining a range of acceptable values for the parameter. If the value of the parameter for a detected signal falls outside the range, a control signal is transmitted from the node to instruct the relevant outstation to alter the value of the parameter as required to bring the value into the acceptable range for subsequent signals originating from that outstation. The method and system are particularly adapted for controlling the temporal position and the amplitude of outstation signals in a TDM passive optical network. A transceiver for use with such a system is also disclosed.
摘要翻译： PCT No.PCT / GB88 / 00356 Sec。 371日期1989年2月2日 102（e）日期1989年2月2日PCT提交1988年5月6日PCT公布。 公开号WO88 / 09093 日期：1988年11月17日。一种用于控制包括中央节点和多个外站的多址无源光网络中的每个外站的信号的方法和控制系统，包括在交换时监视信号的参数的值 从达到outstation。 相对于预定鉴别值监视参数的值，以相对于定义参数的可接受值的范围的预定的第一和第二参考值来检测信号。 如果检测信号的参数值超出该范围，则从节点发送控制信号，以指示相关外站根据需要改变参数的值，以使该值进入可接受的范围，用于源自 那个外站。 该方法和系统特别适用于控制TDM无源光网络中的外站信号的时间位置和振幅。 还公开了一种用于这种系统的收发器。
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2.发明授权Method of communicating digital signals and receiver for use with such method 失效传播数字信号的方法和采用这种方法的接收机
公开(公告)号：US5144669A
公开(公告)日：1992-09-01
申请号：US348575
申请日：1989-04-28
申请人： David W. Faulkner , Dianne M. Russ
发明人： David W. Faulkner , Dianne M. Russ
CPC分类号： H04J3/08
摘要： A receiver (2) for selectively extracting one of two or more time division multiplexed channels of digital signals, which channel has been scrambled before multiplexing using a predetermined digital sequence comprising: a clock means (4) arranged to provide clock pulses having a repetition rate dependent on a clock control signal; a digital sequence generator (10) triggered by each clock pulse to provide a generator signal representative of the next digit in the predetermined digital sequence; a sampling means (8) arranged to provide a sampled signal at the clock pulse rate; and a phase lock means (8, 18, 25, 26, 22, 4, 10) controlling the clock control signal whereby the generator sequence is delay-lockable to the sampled signal. The receiver finds particular application with the reception of digital video signals broadcast through a passive optical network.
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