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1.发明申请OFDM/DMT/digital communications system including partial sequence symbol processing 有权OFDM / DMT /数字通信系统，包括部分序列符号处理公开(公告)号：US20080144487A1
公开(公告)日：2008-06-19
申请号：US11982449
申请日：2007-10-31
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.
摘要翻译： 一种在符号周期上管理信号的方法包括在符号周期的开始和结束部分提供信号的样本。 该方法还包括抑制在符号周期的中间部分处提供信号的样本。
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2.发明授权Apparatus and method for symbol alignment in a multi-point OFDM or DMT digital communications system 失效在多点OFDM或DMT数字通信系统中的符号对准的装置和方法公开(公告)号：US06285654B1
公开(公告)日：2001-09-04
申请号：US08845544
申请日：1997-04-24
IPC分类号： H04J1100
CPC分类号： H04L5/1453 , H04L5/023 , H04L27/2605 , H04L27/2657 , H04L27/2662 , H04L27/2678
摘要： A multi-point communications system that comprises a head end unit disposed at a primary site and a plurality of receivers disposed at remote sites. The head end unit includes a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. The OFDM/DMT symbols are transmitted in periodically occurring formatted symbol frames. The cyclic prefix includes a predetermined periodic signal superimposed thereon. The receivers receive the OFDM/DMT symbols over a subset of the predetermined number of bins from the transmission medium and use the superimposed signals to attain symbol alignment. In accordance with a further aspect of the present invention, the receivers apply a predetermined incremental phase shift to received samples corresponding to the received OFDM/DMT symbols to thereby compensate for phase shifts. The multi-point communications system may include a similar system for aligning symbols transmissions from a remote service unit having a transmitter. Such a system includes a plurality of remote service units each including a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a transmission medium. Each of the plurality of remote service units is operable in a symbol alignment mode in which the transmitter transmits a broad band periodic signal. The head end unit includes a receiver for receiving the OFDM/DMT symbols, including the broad band periodic signal, from the transmission medium. The head end unit uses the time position of the broad band periodic signal to align the symbol transmissions of the remote service unit.
摘要翻译： 一种多点通信系统，包括设置在主站点处的头端单元和设置在远程站点的多个接收器。 头端单元包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 OFDM / DMT符号以周期性出现的格式化符号帧发送。 循环前缀包括叠加在其上的预定周期信号。 接收机在来自传输介质的预定数量的分组的子集上接收OFDM / DMT符号，并使用叠加的信号来获得符号对准。 根据本发明的另一方面，接收机对与所接收的OFDM / DMT符号相对应的接收样本应用预定的增量相移，从而补偿相移。 多点通信系统可以包括用于对准具有发射机的远程服务单元的符号传输的类似系统。 这样的系统包括多个远程服务单元，每个远程服务单元包括用于通过传输介质在预定数量的箱上发送OFDM / DMT符号的发射机。 多个远程服务单元中的每一个可以在发射器发射宽带周期信号的符号对准模式中操作。 头端单元包括用于从传输介质接收包括宽带周期信号的OFDM / DMT符号的接收器。 头端单元使用宽带周期信号的时间位置来对准远程服务单元的符号传输。
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3.发明授权Multi-point OFDM/DMT digital communications system including remote service unit with improved transmitter architecture 失效多点OFDM / DMT数字通信系统，包括具有改进发射机架构的远程业务单元
公开(公告)号：US6118758A
公开(公告)日：2000-09-12
申请号：US772321
申请日：1996-12-23
CPC分类号： H04L27/2662 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L5/023 , H04L5/1453 , H04L27/2657
摘要： A multi-point communications system is set forth herein. The communications system includes a receiver and transmitter disposed at a primary site for communication with a plurality of remote service units disposed at respective secondary sites. The receiver of the primary site receives OFDM/DMT signals over a number of transmission bins. A transmitter at the remote service unit includes an improved transmitter architecture. The transmitter comprises a first circuit for converting a signal into a first serial digital data stream and a second circuit for generating a second serial digital data stream from the first serial digital data stream of the first means. The second serial digital data stream is a digital representation of an OFDM/DMT signal that is to be transmitted to the receiver of the primary site and is generated from the first serial digital data stream through a modulated direct digital synthesis thereof. A third circuit is used to convert the second serial digital data stream into an analog OFDM/DMT signal for transmission to the receiver of the primary site.
摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括设置在主站点处的接收机和发射机，用于与设置在相应次要站点处的多个远程服务单元进行通信。 主站点的接收机通过多个传输箱接收OFDM / DMT信号。 远程服务单元的发射机包括改进的发射机架构。 发射机包括用于将信号转换成第一串行数字数据流的第一电路和用于从第一装置的第一串行数字数据流产生第二串行数字数据流的第二电路。 第二串行数字数据流是OFDM / DMT信号的数字表示，其将被发送到主站点的接收机并且通过其调制的直接数字合成从第一串行数字数据流生成。 第三电路用于将第二串行数字数据流转换为模拟OFDM / DMT信号，以传输到主站点的接收机。
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4.发明授权OFDM/DMT/digital communications system including partial sequence symbol processing 有权OFDM / DMT /数字通信系统，包括部分序列符号处理公开(公告)号：US07898935B2
公开(公告)日：2011-03-01
申请号：US11982449
申请日：2007-10-31
IPC分类号： H04L5/04
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.
摘要翻译： 一种在符号周期上管理信号的方法包括在符号周期的开始和结束部分提供信号的样本。 该方法还包括抑制在符号周期的中间部分处提供信号的样本。
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5.发明授权OFDM/DMT/ digital communications system including partial sequence symbol processing 有权OFDM / DMT /数字通信系统，包括部分序列符号处理公开(公告)号：US08547823B2
公开(公告)日：2013-10-01
申请号：US10883916
申请日：2004-07-02
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.
摘要翻译： 一种在符号周期上管理信号的方法包括在符号周期的开始和结束部分提供信号的样本。 该方法还包括抑制在符号周期的中间部分处提供信号的样本。
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公开(公告)号：US06912194B1
公开(公告)日：2005-06-28
申请号：US09659194
申请日：2000-09-11
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A multi-point communications system is set forth herein. The communications system includes a receiver and transmitter disposed at a primary site for communication with a plurality of remote service units disposed at respective secondary sites. The receiver of the primary site receives OFDM/DMT signals over a number of transmission bins. A transmitter at the remote service unit includes an improved transmitter architecture. The transmitter comprises a first circuit for converting a signal into a first serial digital data stream and a second circuit for generating a second serial digital data stream from the first serial digital data stream of the first means. The second serial digital data stream is a digital representation of an OFDM/DMT signal that is to be transmitted to the receiver of the primary site and is generated from the first serial digital data stream through a modulated direct digital synthesis thereof. A third circuit is used to convert the second serial digital data stream into an analog OFDM/DMT signal for transmission to the receiver of the primary site.
摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括设置在主站点处的接收机和发射机，用于与设置在相应次要站点处的多个远程服务单元进行通信。 主站点的接收机通过多个传输箱接收OFDM / DMT信号。 远程服务单元的发射机包括改进的发射机架构。 发射机包括用于将信号转换成第一串行数字数据流的第一电路和用于从第一装置的第一串行数字数据流产生第二串行数字数据流的第二电路。 第二串行数字数据流是OFDM / DMT信号的数字表示，其将被发送到主站点的接收机并且通过其调制的直接数字合成从第一串行数字数据流生成。 第三电路用于将第二串行数字数据流转换为模拟OFDM / DMT信号，以传输到主站点的接收机。
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公开(公告)号：US6141317A
公开(公告)日：2000-10-31
申请号：US959428
申请日：1997-10-28
CPC分类号： H04L27/2662 , H04L27/2608 , H04L27/2657 , H04L5/0046 , H04L5/023 , H04L5/1453 , H04L5/0007 , H04L5/0058 , H04L5/006
摘要： A multi-point communications system having an allocated total bandwidth is set forth. The system comprises a head end unit disposed at a primary site. The head end unit includes a receiver for receiving OFDM/DMT modulated data from a plurality of remote transceivers over a predetermined number of bins from a transmission medium. The receiver of the head end unit receives OFDM/DMT modulated data corresponding to a first data stream from a first one of the plurality of remote transceivers over one or more bins of a first subset of the predetermined number of bins and OFDM/DMT data corresponding to a second data stream from a second one of the plurality of remote transceivers over one or more bins of a second subset of the predetermined number of bins. The head end unit and each of the first and second transceivers can receive and/or transmit in at least a given X QAM mode or Y QAM mode. The head end unit monitors actual bandwidth usage of the total allocated bandwidth and uses the measured bandwidth usage to alter the QAM modes used for communications within the system.
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8.发明授权OFDM/DMT/digital communications system including partial sequence symbol processing 有权OFDM / DMT /数字通信系统，包括部分序列符号处理公开(公告)号：US08243583B2
公开(公告)日：2012-08-14
申请号：US13012683
申请日：2011-01-24
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.
摘要翻译： 一种在符号周期上管理信号的方法包括在符号周期的开始和结束部分提供信号的采样。 该方法还包括抑制在符号周期的中间部分处提供信号的样本。
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9.发明申请OFDM/DMT/DIGITAL COMMUNICATIONS SYSTEM INCLUDING PARTIAL SEQUENCE SYMBOL PROCESSING 有权OFDM / DMT /数字通信系统，包括部分序列符号处理公开(公告)号：US20110116571A1
公开(公告)日：2011-05-19
申请号：US13012683
申请日：2011-01-24
IPC分类号： H04L27/04
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A method of managing a signal over a symbol period includes supplying samples of the signal at beginning and end portions of the symbol period. The method further includes suppressing the supply of samples of the signal at a middle portion of the symbol period.
摘要翻译： 一种在符号周期上管理信号的方法包括在符号周期的开始和结束部分提供信号的样本。 该方法还包括抑制在符号周期的中间部分处提供信号的样本。
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10.发明授权OFDM/DMT digital communications system including partial sequence symbol processing 有权包括部分序列符号处理的OFDM / DMT数字通信系统公开(公告)号：US06804192B1
公开(公告)日：2004-10-12
申请号：US09379676
申请日：1999-08-24
IPC分类号： H04J1100
CPC分类号： H04L27/2662 , H04L5/023 , H04L5/1453 , H04L27/20 , H04L27/2602 , H04L27/2628 , H04L27/2647 , H04L27/2657
摘要： A multi-point communications system is set forth herein. The communications system includes a receiver and transmitter disposed at a primary site for communication with a plurality of remote service units disposed at respective secondary sites. The receiver of the primary site receives OFDM/DMT signals over a number of transmission bins. A transmitter at the remote service unit includes an improved transmitter architecture. The transmitter comprises a first circuit for converting a signal into a first serial digital data stream and a second circuit for generating a second serial digital data stream from the first serial digital data stream of the first means. The second serial digital data stream is a digital representation of an OFDM/DMT signal that is to be transmitted to the receiver of the primary site and is generated from the first serial digital data stream through a modulated direct digital synthesis thereof. A third circuit is used to convert the second serial digital data stream into an analog OFDM/DMT signal for transmission to the receiver of the primary site.
摘要翻译： 本文阐述了一种多点通信系统。 通信系统包括设置在主站点处的接收机和发射机，用于与设置在相应次要站点处的多个远程服务单元进行通信。 主站点的接收机通过多个传输箱接收OFDM / DMT信号。 远程服务单元的发射机包括改进的发射机架构。 发射机包括用于将信号转换成第一串行数字数据流的第一电路和用于从第一装置的第一串行数字数据流产生第二串行数字数据流的第二电路。 第二串行数字数据流是OFDM / DMT信号的数字表示，其将被发送到主站点的接收机并且通过其调制的直接数字合成从第一串行数字数据流生成。 第三电路用于将第二串行数字数据流转换为模拟OFDM / DMT信号，以传输到主站点的接收机。
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