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公开(公告)号：US5930231A
公开(公告)日：1999-07-27
申请号：US625399
申请日：1996-03-27
申请人： Kevin L. Miller , Ramin Borazjani
发明人： Kevin L. Miller , Ramin Borazjani
IPC分类号： H04N7/10 , H04B1/26 , H04H20/34 , H04H20/42 , H04H20/79 , H04H20/80 , H04H40/27 , H04H60/97 , H04J11/00 , H04L5/02 , H04L5/14 , H04L7/02 , H04L12/28 , H04M3/00 , H04M7/00 , H04M7/12 , H04M9/02 , H04N7/173 , H04J1/00 , H04J3/16
CPC分类号： H04H20/80 , H04H20/34 , H04H20/42 , H04H20/79 , H04H40/27 , H04H60/97 , H04L12/2801 , H04L5/023 , H04L5/143 , H04M7/006 , H04N7/10 , H04N7/17309 , H04L7/0062 , H04M7/12 , H04M9/027
摘要： A communication system for coupling telephony or other signals to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers upstream to a headend unit (HIU) are modulated onto the reverse band of the broadband network in a frequency division multiple access (FDMA) arrangement. The upstream modulated telephony signals are received at a telephony network interface at the HIU coupled to the broadband network. A group of reverse band modulated telephony signals are received at a group receiver or channelizer. The group receiver processes all upstream telephony signals within a selected spectral subband in the reverse band to apply a receiver matched filter with a weighted overlap and add circuit, and are then converted to baseband by an FFT circuit. The group receiver provides a serial data stream representing the baseband telephony signals. The baseband telephony signals are processed to derive demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.
摘要翻译： 用于将电话或其他信号耦合到诸如CATV网络的宽带网络的通信系统。 该系统在宽带网络的前向频带中发送电话信号的复用，其中各个信号被定向到寻址的用户。 从用户上游返回到前端单元（HIU）的电话信号在频分多址（FDMA）布置中被调制到宽带网络的反向频带上。 在耦合到宽带网络的HIU处的电话网络接口处接收上行调制电话信号。 一组反向频带调制电话信号在组接收机或信道发送器处被接收。 组接收机处理反向频带内所选择的频谱子带内的所有上行电话信号，以将具有加权重叠和相加电路的接收机匹配滤波器应用于FFT电路。 组接收器提供表示基带电话信号的串行数据流。 处理基带电话信号以导出解调的电话信号。 解调的电话信号耦合到电话网络。
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2.发明授权
公开(公告)号：US5537637A
公开(公告)日：1996-07-16
申请号：US207209
申请日：1994-03-08
申请人： Tadao Sugita , Tatehiko Toyosawa , Kazumi Shoji , Shinichi Watanabe , Atsumi Fujiwara , Masaaki Kitanda
发明人： Tadao Sugita , Tatehiko Toyosawa , Kazumi Shoji , Shinichi Watanabe , Atsumi Fujiwara , Masaaki Kitanda
CPC分类号： H04H20/80 , H01Q1/007 , H04B5/0093
摘要： A medium-frequency radio transmission system is formed by installing a receiving antenna for receiving an amplitude-modulated medium-frequency radio wave at the rooftop of an existing building, receiving the medium-frequency radio wave, coupling the received medium-frequency radio wave to an existing distributing cable or distributing conductive piping with or without a coupler for the radio wave, and transmitting the radio wave to a predetermined floor. At the predetermined floor the basement or tunnel of an existing building such as underground shopping mall, underground parking lot, underground railway, road tunnel or deep space of massive building is provided with a coupling such as an existing loop-like or linear wiring or piping line with or without a coupler.
摘要翻译： 通过在现有建筑物的屋顶安装用于接收调幅中频无线电波的接收天线，接收中频无线电波，将接收到的中频无线电波耦合到 现有的分配电缆或具有或不具有用于无线电波的耦合器的导电管线，以及将无线电波发射到预定的地板。 在预定楼层，现有建筑物的地下室或隧道，如地下商场，地下停车场，地下铁路，公路隧道或大型建筑物的深空，设有诸如现有的环状或线性布线或管道 具有或不具有耦合器的线。
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公开(公告)号：US09667270B2
公开(公告)日：2017-05-30
申请号：US14804939
申请日：2015-07-21
发明人： Junghoe Kim , Miao Lei , Eunmi Oh
IPC分类号： G10L19/008 , G10L19/16 , H04S3/00 , H03M7/30 , H04H20/80
CPC分类号： H03M7/30 , G10L19/008 , G10L19/167 , H04H20/80 , H04S3/002 , H04S3/008 , H04S2420/03
摘要： An system, method, and method of encoding/decoding a multi-channel audio signal, including a decoding level generation unit producing decoding-level information that helps a bitstream including a number of audio channel signals and space information to be decoded into a number of audio channel signals, wherein the space information includes information about magnitude differences and/or similarities between channels, and an audio decoder decoding the bitstream according to the decoding-level information. Accordingly, even a single input bitstream can be decoded into a suitable number of channels depending on the type of a speaker configuration used. Scalable channel decoding can be achieved by partially decoding an input bitstream. In the scalable channel decoding, a decoder may set decoding levels and outputs audio channel signals according to the decoding levels, thereby reducing decoding complexity.
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公开(公告)号：US5412415A
公开(公告)日：1995-05-02
申请号：US941066
申请日：1992-10-13
CPC分类号： H04N7/22
摘要： Signals, such as television signals, are distributed from a head-end station via a fibre network. The signals are amplitude modulated on carriers at different frequencies, and the different carriers combined to form a composite analogue signal. In the head-end station the composite analogue signal is clipped to reduce the peak-to-mean ratio and the clipped composite signal is digitized. The resulting digital data is transmitted onto the fibre network and is received at an optical receiver. The optical receiver reconstitutes the composite analogue signal for reception by a termination. In one example the composite analogue signal has a bandwidth of one octave or less, and is digitized by sampling at a sampling rate below the Nyquist rate.
摘要翻译： PCT No.PCT / GB91 / 00568 Sec。 371日期：1992年10月13日 102（e）日期1992年10月13日PCT 1991年4月10日PCT PCT。 公开号WO91 / 15927 日期：1991年10月17日。信号，如电视信号，通过光纤网络从头端站分发。 信号在不同频率的载波上进行幅度调制，并且不同载波组合形成复合模拟信号。 在前端站中，复合模拟信号被削波以减小峰值平均比，并且限幅复合信号被数字化。 所得到的数字数据被传送到光纤网络上，并在光接收器处被接收。 光接收机通过终端重构复合模拟信号以进行接收。 在一个示例中，复合模拟信号具有一个八度或更小的带宽，并且通过以低于奈奎斯特速率的采样速率采样进行数字化。
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公开(公告)号：US20200076469A1
公开(公告)日：2020-03-05
申请号：US16492745
申请日：2018-03-15
申请人： TECHNETIX B.V.
IPC分类号： H04B3/36 , H04B10/2575 , H04B3/58 , H04B3/54 , H04H20/69 , H04H20/80 , H04N21/61 , H04N7/10 , H04N7/173
摘要： A method of transporting digital data over coaxial cable comprising converting digital signals associated with data into data electrical signals having a frequency extending up to at least 2 GHz and transmitting the electrical signals over coaxial cable. The data electrical signals can comprise upstream and downstream signals arranged in separate non-overlapping frequency bands, with the upstream band having a lower frequency than the downstream band.A replacement Abstract is attached hereto on a separate sheet in accordance with 37 CFR 1.72.
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6.发明授权Method and apparatus for reducing peak to average power ratio in digital broadcasting systems 有权用于降低数字广播系统中的峰均功率比的方法和装置
公开(公告)号：US6128350A
公开(公告)日：2000-10-03
申请号：US379780
申请日：1999-08-24
CPC分类号： H04L27/2624
摘要： This invention provides a method for reducing peak to average power ratio in a radio frequency signal. The method comprises the steps of modulating a plurality of sub-carriers with a plurality of data symbol vectors to produce a first modulated signal; limiting the magnitude of the first modulated signal to produce a first limited modulated signal; demodulating the first limited modulated signal to recover the constellation points; predistorting the data symbol vectors to provide a minimum magnitude for in-phase and quadrature components thereof to produce predistorted data symbol vectors; modulating the plurality of carriers with the predistorted data symbol vectors to produce a second modulated signal; limiting the magnitude the second modulated signal to produce a second limited modulated signal; and reducing intermodulation products in the second limited modulated signal. Transmitters that perform the method are also included.
摘要翻译： 本发明提供一种用于降低射频信号中的峰均功率比的方法。 该方法包括以多个数据符号向量调制多个子载波以产生第一调制信号的步骤; 限制第一调制信号的幅度以产生第一有限调制信号; 解调第一限制调制信号以恢复星座点; 预失真数据符号向量以为其同相和正交分量提供最小幅值以产生预失真数据符号向量; 用所述预失真数据符号向量调制所述多个载波以产生第二调制信号; 限制第二调制信号的幅度以产生第二有限调制信号; 并减少第二有限调制信号中的互调产物。 还包括执行该方法的变送器。
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公开(公告)号：US5898693A
公开(公告)日：1999-04-27
申请号：US400792
申请日：1995-03-08
申请人： Mario P. Vecchi , Jay Vaughan
发明人： Mario P. Vecchi , Jay Vaughan
CPC分类号： H04N7/17354 , H04H20/80 , H04J1/12 , H04J3/1694
摘要： A spectrum manager and a spectrum management method for a communication network. The preferred embodiment is a method of controlling the transmission of multiple information streams in a communication network comprising the steps of providing a communication network and a plurality of information streams corresponding to a plurality of analog and digital services provided by the network; assigning to each information stream one or more spectrum slices within a predetermined frequency spectrum so that each information stream has a different spectrum slice(s) assigned to it; transmitting the information streams over the communication network within the information streams' assigned spectrum slices; assigning to at least one information stream a new spectrum slice within the predetermined frequency spectrum; and transmitting the information streams over the communication network within the information streams' assigned spectrum slices. The invention also includes a communication network comprising a distribution hub; user stations; signal carriers between the distribution hub and the user stations; a network controller comprising function for controlling transmission spectrum slice for service information streams transmitted from the distribution hub to user stations and from user stations to the distribution hub and function for changing a parameter of a transmission spectrum slice.
摘要翻译： 频谱管理器和通信网络的频谱管理方法。 优选实施例是一种控制通信网络中的多个信息流的传输的方法，包括以下步骤：提供与由网络提供的多个模拟和数字服务相对应的通信网络和多个信息流; 向每个信息流分配预定频谱内的一个或多个频谱片，使得每个信息流具有分配给它的不同的频谱片; 通过信息流分配的频谱片内的通信网络发送信息流; 向所述预定频谱内的至少一个信息流分配新的频谱切片; 以及在信息流的分配频谱切片内通过通信网络发送信息流。 本发明还包括一个包括分配集线器的通信网络; 用户站; 分配集线器和用户站之间的信号载体; 网络控制器，其包括用于控制从分发集线器发送到用户站以及从用户站到分发集线器的服务信息流的传输频谱片的功能，以及用于改变传输频谱片的参数的功能。
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公开(公告)号：US5689804A
公开(公告)日：1997-11-18
申请号：US586973
申请日：1996-01-16
申请人： Tadao Sugita , Tatehiko Toyosawa , Kazumi Shoji , Shinichi Watanabe , Atsumi Fujiwara , Masaaki Kitanda
发明人： Tadao Sugita , Tatehiko Toyosawa , Kazumi Shoji , Shinichi Watanabe , Atsumi Fujiwara , Masaaki Kitanda
CPC分类号： H04H20/80 , H01Q1/007 , H04B5/0093
摘要： A medium-frequency radio transmission system is formed by installing a receiving antenna for receiving an amplitude-modulated medium-frequency radio wave at the rooftop of an existing building, receiving the medium-frequency radio wave, coupling the received medium-frequency radio wave to an existing distributing cable or distributing conductive piping with or without a coupler for said radio wave, and transmitting the radio wave to a predetermined floor. At the predetermined floor the basement or tunnel of an existing building such as underground shopping mall, underground parking lot, underground railway, road tunnel or deep space of massive building is provided with a coupling such as an existing loop-like or linear wiring or piping line with or without coupler.
摘要翻译： 通过在现有建筑物的屋顶安装用于接收调幅中频无线电波的接收天线，接收中频无线电波，将接收到的中频无线电波耦合到 现有的分配电缆或具有或不具有用于所述无线电波的耦合器的导电管线，以及将无线电波发射到预定的地板。 在预定楼层，现有建筑物的地下室或隧道，如地下商场，地下停车场，地下铁路，公路隧道或大型建筑物的深空，设有诸如现有的环状或线性布线或管道 具有或不具有耦合器的线。
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9.发明授权Transformers and networks for tapping or branching cables carrying two or more frequency bands 失效变压器和网络用于分接或分支带有两个或更多频段的电缆
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公开(公告)号：US20210143865A1
公开(公告)日：2021-05-13
申请号：US16492765
申请日：2018-03-15
申请人： TECHNETIX B.V.
IPC分类号： H04B3/54 , H04B3/58 , H04B10/2575 , H04H20/69 , H04H20/80 , H04H60/96 , H04H20/78 , H04N21/61 , H04N7/22 , H04N7/173
摘要： A method of transporting digital data over coaxial cable comprising converting digital signals associated with data into data electrical signals, positioning at least one repeater station, along a coaxial cable, restoring digital signals from the data electrical signals at the repeater station, and converting the digital signals back into data electrical signals at the repeater station for onward transmission. Typically a plurality of repeater stations are disposed at spaced-apart intervals along the coaxial cable with each repeater station comprises a receiver and transmitter, the receiver receiving data electrical signals and restoring these into digital signals with the transmitter converting the digital signals back into data electrical signals for onward transmission. The data electrical signals have a frequency of at least 2 GHz.
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