专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06785340B1 PCM upstream and downstream system for universal digital loop carrier 有权
标题翻译： PCM上下游系统，用于通用数字环路载波
公开(公告)号：US06785340B1
公开(公告)日：2004-08-31
申请号：US09579077
申请日：2000-05-25
申请人： John F. Stockman , David M. Motley , Richard A. Kolbush , Robert Kroninger
发明人： John F. Stockman , David M. Motley , Richard A. Kolbush , Robert Kroninger
IPC分类号： H04L2700
CPC分类号： H04L25/4927 , H04Q11/04 , H04Q2213/13031 , H04Q2213/13034 , H04Q2213/13039 , H04Q2213/13381
摘要： A central office line unit (COLU) for a pulse code modulation (PCM) upstream and downstream system in a universal digital loop carrier (UDLC) includes a hybrid circuit for transmitting/receiving an analog signal to/from a switch. An analog-to-digital converter is provided for receiving the analog signal from the hybrid circuit and converting the analog signal to a converted digital signal. A digital transmission circuit transmits/receives a digital signal to/from a remote terminal. A quantizer is provided for evaluating and processing the converted digital signal so that only valid states of the converted digital signal are transmitted to the digital transmission circuit for transmission to the remote terminal. A receiver is used for receiving the digital signal from the digital transmission circuit and for evaluating and processing the digital signal so that only valid states of the digital signal are outputted from the receiver. A transmitter receives the digital signal from the receiver and equalizes the digital signal. And, a digital-to-analog converter converts the equalized digital signal to a converted analog signal and transmits the converted analog signal to the hybrid circuit, which transmits the converted analog signal to the switch.
摘要翻译：用于通用数字环路载波（UDLC）中的脉冲编码调制（PCM）上下游系统的中心局线路单元（COLU）包括用于向/从交换机发送/接收模拟信号的混合电路。提供一个模拟 - 数字转换器，用于从混合电路接收模拟信号，并将模拟信号转换成转换后的数字信号。数字传输电路向/从远程终端发送/接收数字信号。提供了用于评估和处理转换的数字信号的量化器，使得仅转换的数字信号的有效状态被发送到数字传输电路以传输到远程终端。接收机用于从数字传输电路接收数字信号，并用于评估和处理数字信号，使得只有数字信号的有效状态从接收机输出。发射机接收来自接收机的数字信号，并均衡数字信号。并且，数模转换器将均衡的数字信号转换为转换的模拟信号，并将转换的模拟信号发送到混合电路，混合电路将转换的模拟信号发送到开关。

IPRDB

热门服务

关于我们

友情链接

联系方式