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公开(公告)号：US20050254565A1
公开(公告)日：2005-11-17
申请号：US11187265
申请日：2005-07-22
申请人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
摘要翻译： 提供发射幅度独立的自适应均衡器，当发射信号幅度未知时，其补偿输入信号中的传输损耗。 提供了几个实施例，包括具有均衡器核心，可控摆动限幅器和幅度控制环路的第一实施例，具有均衡器核心，固定摆动切片器和控制回路的第二实施例，具有均衡器核心 ，可变增益放大器和可变增益放大器控制环路，以及具有均衡器核心，固定摆幅限幅器，可变增益放大器和可变增益放大器控制环路的第四实施例。
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公开(公告)号：US5822312A
公开(公告)日：1998-10-13
申请号：US633676
申请日：1996-04-17
申请人： Robert Peach , Nigel Miller , Bharat Tailor , Kamal Ali , Gary Beauchamp , Simon Lam , Ken Lazaris-Brunner
发明人： Robert Peach , Nigel Miller , Bharat Tailor , Kamal Ali , Gary Beauchamp , Simon Lam , Ken Lazaris-Brunner
CPC分类号： H04B7/2041
摘要： A repeater for a multibeam communications satellite combines the features of coaxial channel interbeam switching and subchannelization of some of the channels. In one embodiment described, the input radio-frequency signals from the input beams are fed through the input multiplexers to form channels. Some, but not all, channels are subsequently subchannelized for interbeam switching. In another embodiment of the invention, a portion of the incoming radio frequency signals bypasses the input demultiplexer and is filtered for noise-limiting reasons, converted down to an intermediate frequency and then subchannelized using SAW filters. The specification also teaches that digital techniques can be used to obtain the same results. Especially in the case of satellites with a large number of beams and a large number of channels, it is not necessary to have full interbeam switching of all the subchannels derived from one channel: instead, the specification proposes the use of parallel configurations of smaller, less complex switching networks.
摘要翻译： 用于多波束通信卫星的中继器结合了同轴信道交织切换和某些信道的子信道化的特征。 在所描述的一个实施例中，来自输入光束的输入射频信号通过输入多路复用器馈送以形成信道。 一些但不是全部的信道随后被子信道化以进行交换。 在本发明的另一实施例中，输入射频信号的一部分绕过输入解复用器，并且由于噪声限制的原因而被滤波，转换成中频，然后使用SAW滤波器进行子信道化。 该规范还教导可以使用数字技术获得相同的结果。 特别是在具有大量波束和大量信道的卫星的情况下，不需要对从一个信道导出的所有子信道进行完全的交换机切换：相反，本说明书提出使用较小的， 较不复杂的交换网络。
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公开(公告)号：US07415064B2
公开(公告)日：2008-08-19
申请号：US11187265
申请日：2005-07-22
申请人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
IPC分类号： H03K5/159
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
摘要翻译： 提供发射幅度独立的自适应均衡器，当发射信号幅度未知时，其补偿输入信号中的传输损耗。 提供了几个实施例，包括具有均衡器核心，可控摆动限幅器和幅度控制环路的第一实施例，具有均衡器核心，固定摆动切片器和控制回路的第二实施例，具有均衡器核心 ，可变增益放大器和可变增益放大器控制环路，以及具有均衡器核心，固定摆幅限幅器，可变增益放大器和可变增益放大器控制环路的第四实施例。
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公开(公告)号：US07180941B2
公开(公告)日：2007-02-20
申请号：US11187266
申请日：2005-07-22
申请人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
IPC分类号： H03H7/30
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
摘要翻译： 提供发射幅度独立的自适应均衡器，当发射信号幅度未知时，其补偿输入信号中的传输损耗。 提供了几个实施例，包括具有均衡器核心，可控摆动限幅器和幅度控制环路的第一实施例，具有均衡器核心，固定摆动切片器和控制回路的第二实施例，具有均衡器核心 ，可变增益放大器和可变增益放大器控制环路，以及具有均衡器核心，固定摆幅限幅器，可变增益放大器和可变增益放大器控制环路的第四实施例。
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公开(公告)号：US20050254566A1
公开(公告)日：2005-11-17
申请号：US11187266
申请日：2005-07-22
申请人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
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公开(公告)号：US07317757B2
公开(公告)日：2008-01-08
申请号：US11187267
申请日：2005-07-22
申请人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
IPC分类号： H03H7/30
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
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公开(公告)号：US06956914B2
公开(公告)日：2005-10-18
申请号：US09957064
申请日：2001-09-19
申请人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Krishna Gupta , Kenneth Steven Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Kumar Shukla , Bharat Tailor
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
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公开(公告)号：US06266329B1
公开(公告)日：2001-07-24
申请号：US09536767
申请日：2000-03-28
IPC分类号： H04B7212
CPC分类号： H04H40/90
摘要： A multi-beam DBS satellite system capable of providing spectrally efficient regional programming is disclosed. The inventive system includes at least one DBS satellite having a repeater connected between multiple uplink antennas and multiple downlink antennas. The repeater has a switching processor and a formatting processor. The switching processor includes circuitry for filtering individual channels of information from the uplink frequency division multiplexed (FDM) beams received at the uplink antennas, and also includes circuitry for switching the channels of information to form a set of switched channels. These switched channels are then combined and routed to the formatting processor. The formatting processor converts the switched FDM information into a combined digital TDM signal that preferably corresponds to the DVB standard. Using this repeater, the present invention is capable of linking different geographical sources of programming information to multiple downlink beams in a flexible and spectrally efficient manner for direct transmission to home receivers.
摘要翻译： 公开了一种能够提供光谱高效区域编程的多波束DBS卫星系统。 本发明的系统包括至少一个DBS卫星，其具有连接在多个上行链路天线和多个下行链路天线之间的中继器。 中继器具有切换处理器和格式化处理器。 切换处理器包括用于从在上行链路天线处接收的上行链路频分多路复用（FDM）波束中的各个信道信号进行滤波的电路，并且还包括用于切换信息信道以形成一组切换信道的电路。 然后将这些交换的信道组合并路由到格式化处理器。 格式化处理器将切换的FDM信息转换成优选对应于DVB标准的组合数字TDM信号。 使用该中继器，本发明能够以灵活和频谱有效的方式将不同地理编程信息源连接到多个下行链路波束，以便直接传送到家庭接收机。
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公开(公告)号：US06047162A
公开(公告)日：2000-04-04
申请号：US935079
申请日：1997-09-25
CPC分类号： H04H40/90
摘要： A multi-beam DBS satellite system capable of providing spectrally efficient regional programming includes at least one DBS satellite having a repeater connected between multiple uplink antennas and multiple downlink antennas. The repeater has a switching processor and a formatting processor. The switching processor includes circuitry for filtering individual channels of information from the uplink frequency division multiplexed (FDM) beams received at the uplink antennas, and also includes circuitry for switching the channels of information to form a set of switched channels. These switched channels are then combined and routed to the formatting processor. The formatting processor converts the switched FDM information into a combined digital TDM signal that preferably corresponds to the DVB standard. Using this repeater, the present invention is capable of linking different geographical sources of programming information to multiple downlink beams in a flexible and spectrally efficient manner for direct transmission to home receivers.
摘要翻译： 能够提供频谱有效的区域编程的多波束DBS卫星系统包括至少一个具有连接在多个上行链路天线和多个下行链路天线之间的中继器的DBS卫星。 中继器具有切换处理器和格式化处理器。 切换处理器包括用于从在上行链路天线处接收的上行链路频分多路复用（FDM）波束中的各个信道信号进行滤波的电路，并且还包括用于切换信息信道以形成一组切换信道的电路。 然后将这些交换通道组合并路由到格式化处理器。 格式化处理器将切换的FDM信息转换成优选对应于DVB标准的组合数字TDM信号。 使用该中继器，本发明能够以灵活和频谱有效的方式将不同地理编程信息源连接到多个下行链路波束，以便直接传送到家庭接收机。
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公开(公告)号：US20050254567A1
公开(公告)日：2005-11-17
申请号：US11187267
申请日：2005-07-22
申请人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
发明人： Apu Sivadas , Atul Gupta , Kenneth Lazaris-Brunner , Vasilis Papanikolaou , Rajiv Shukla , Bharat Tailor
CPC分类号： H04L25/03885
摘要： Transmit amplitude independent adaptive equalizers are provided that compensate for transmission losses in an input signal when the transmit signal amplitude is unknown. Several embodiments are provided, including a first embodiment having an equalizer core, a controllable-swing slicer and an amplitude control loop, a second embodiment having an equalizer core, a fixed-swing slicer and a control loop, a third embodiment having an equalizer core, a variable gain amplifier, and a variable gain amplifier control loop, and a fourth embodiment having an equalizer core, a fixed-swing slicer, a variable gain amplifier, and a variable gain amplifier control loop.
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