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1. 发明公开

CN1961512A 正交频分多路复用(OFDM)数据包检测单元,检测OFDM数据包的方法无效
公开(公告)号：CN1961512A
公开(公告)日：2007-05-09
申请号：CN200580013915.5
申请日：2005-05-11
申请人：德州仪器公司
发明人：蒂莫西·F·墨菲 , 拉尔夫·E·坦普尔
IPC分类号： H04J11/00 , H04J1/20 , H04L27/10
CPC分类号： H04L27/2675 , H04L27/261 , H04L27/2656 , H04L27/2662
摘要：本发明提供一种正交频分多路复用(OFDM)数据包检测单元。在一实施例中，所述OFDM数据包检测单元(142)包括一相关指示器(143)，所述相关指示器(143)经配置以使一所接收的符号与一所存储的标准符号互相关以得到一相关结果。另外，所述OFDM数据包检测单元(142)还包括一阈值鉴别器(144)，所述阈值鉴别器(144)耦接至所述相关指示器(143)并经配置以根据所述相关结果与一阈值之间的比较来针对一快速傅立叶变换(FFT)布局峰值(141)产生一数据包检测信号。

2. 发明公开

CN1249579A 正交多载波信号的生成方法及解码方法失效
公开(公告)号：CN1249579A
公开(公告)日：2000-04-05
申请号：CN99119481.0
申请日：1999-09-20
申请人：日本胜利株式会社
发明人：金子敬一 , 高冈胜美 , 松井一成 , 佐伯隆昭
IPC分类号： H04J11/00 , H04J1/20 , H04L27/30
CPC分类号： H04L27/2628 , H04L27/2602 , H04L27/265
摘要：在生成以每隔8个的全部的128个载波来传输信息的间断型正交多载波信号的情况下,进行128点IDFT变换,产生不是间断型的多载波信号。由此,生成在(A)中表示频谱的非间断型的多载波信号,在把其重复8次合成之后,以预定的码元期间进行传输。由此,如在(B)中所示的频谱那样,可以生成由每隔8个的载波组成的间断型多载波信号。这样,能够用进行比现有技术点数少的128点IDFT变换的运算电路来生成所希望的间断型的正交多载波信号。

3. 发明公开

EP1232593A1 MULTICARRIER DIGITAL TRANSMISSION SYSTEM USING AN OQAM TRANSMULTIPLEXER 审中-公开
标题翻译：数字多载波新闻传播系统
公开(公告)号：EP1232593A1
公开(公告)日：2002-08-21
申请号：EP00989764.6
申请日：2000-11-09
申请人： Bellanger, Maurice , Dao, Tich
发明人： Bellanger, Maurice , Dao, Tich
IPC分类号： H04J1/20 , H04L7/00 , H04L27/01 , H04L27/34
CPC分类号： H04L27/2656 , H04L27/264 , H04L27/2697 , H04L2025/03414
摘要： An emitter converts a serial input data stream into a set of parallel substreams. An OQAM modulator (120) receives and supplies each substream to an input of a synthesis filter bank (130). Synchronization input(s) of the filter bank receive an OQAM signal that carries a data sequence. This sequence contains frame, superframe and hyperframe synchronization patterns, and specifies the number of bits allocated to each subchannel. A receiver (200) includes an analysis filter bank (210) that decomposes the multicarrier signal into a set of elementary signals for each subchannel. A synchronizing processing block (270) receives output(s) of the filter bank for synchronization subchannel(s). The block (270) includes a first cascade of blocks that control receiver sampling times, and a second cascade of blocks that extract synchronization patterns and subchannel bit assignment data. Other filter bank outputs are each coupled to a cascade subchannel equalizer (220) followed by a data extractor (230) and a parallel-to-serial converter (240).

4. 发明公开

EP0743768A4 DEVICE AND METHOD FOR MULTIPLEXING SIGNAL 失效
标题翻译：设备和方法信号复用技术
公开(公告)号：EP0743768A4
公开(公告)日：1999-10-27
申请号：EP95938634
申请日：1995-12-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NARAHASHI SHOICHI , KUMAGAI KEN , NOJIMA TOSHIO , TARUSAWA YOSHIAKI
IPC分类号： H03G3/30 , H04B1/04 , H04J1/00 , H04J1/06 , H04J1/16 , H04J1/20 , H04L5/06 , H04L27/10 , H04L27/12 , H04L27/26
CPC分类号： H04J1/06 , H03G3/30 , H03G3/3042 , H04J1/065 , H04J1/16 , H04J1/20 , H04L5/06 , H04L27/10 , H04L27/12 , H04L27/2621
摘要： Modulated signals inputted through terminals 111-11n are converted in frequency into signals of mutually different frequency bands by means of frequency converting means 121-12n. The converted signals are supplied to a power combining means (16) respectively through variable attenuators 211-21n, multiplexed and outputted. Part of the multiplexed output is extracted and a level detecting means (23) detects the envelope power level. A control means (24) inputs the level L detected by the detecting means (23). When the level L exceeds the level Ls which is k-times (k is about 4 or 5) higher than the average power of the multiplexed signals, the control means (24) attenuates the average power of the modulated signals by a fctor of k/n during the period of about 1/ DELTA F0 (sec.) (where DELTA F0 is the band-width frequency of the multiplexed signals) by means of the attenuators 211-21n.

5. 发明申请

WO02017636A1 TRANSCEIVER APPLICATIONS IN HFC NETWORKS 审中-公开
标题翻译： HFC网络中的收发器应用
公开(公告)号：WO02017636A1
公开(公告)日：2002-02-28
申请号：PCT/EP2001/009393
申请日：2001-08-14
IPC分类号： H04B10/02 , H04B10/18 , H04B10/24 , H04J1/18 , H04J1/20 , H04N7/173 , H04N7/22
CPC分类号： H04N21/6118 , H04N7/17309 , H04N7/22 , H04N21/6168
摘要： An HFC node and network with overlay architecture uses a transceiver. The transceiver is connected to a downstream signal that can sustain relatively high levels of distortion. This will generally be the quadrature amplitude modulated (QAM) signal that carriers digital television signals. The transceiver is also connected to an upstream signal that comes from consumers' homes and that contains data to be sent to the CAble TeleVision (CATV) provider. A second forward receiver receives a downstream signal that has more stringent requirements for distortion. This will generally be the "normal" analog television signal, called an amplitude-modulated, vestigial side band (AM-VSB) signal. The two downstream signals are overlaid by an overlay coupler and then sent to consumers' homes. In general, because the QAM signal received by the transceiver, contains relatively high levels of distortion, the transceiver is connected to a filter that reduces the distortion before the QAM signal is combined with the AM-VSB signal.
摘要翻译：具有覆盖架构的HFC节点和网络使用收发器。收发器连接到可以承受较高水平失真的下行信号。这通常是载波数字电视信号的正交调幅（QAM）信号。收发器还连接到来自消费者家庭的上行信号，并且包含要发送到CAble TeleVision（CATV）提供商的数据。第二个正向接收器接收对失真有更严格要求的下行信号。这通常是称为幅度调制的残留边带（AM-VSB）信号的“正常”模拟电视信号。两个下行信号由覆盖耦合器覆盖，然后发送到消费者家中。通常，由于由收发器接收的QAM信号包含相对较高的失真水平，所以收发器连接到滤波器，该滤波器在QAM信号与AM-VSB信号组合之前减小失真。

6. 发明公开

EP0825736A2 Simultaneous communication of analog frequency-modulated and digitally modulated signals using precanceling 失效
标题翻译：使用Vorlöschung从模拟频率并发消息发送调制和数字调制信号
公开(公告)号：EP0825736A2
公开(公告)日：1998-02-25
申请号：EP97306133.6
申请日：1997-08-12
申请人： LUCENT TECHNOLOGIES INC.
发明人： Papadopoulos, Haralabos C. , Sundberg, Carl-Erik Wilhelm
IPC分类号： H04J9/00 , H04H1/00 , H04J1/20
CPC分类号： H04H20/30 , H04H2201/183
摘要： In a system for simulcasting digitally modulated and analog FM signals over the same FM frequency band, the effect of the analog FM signal on the digitally modulated signal in the simulcast is calculated and canceled from the latter signal before its transmission. As a result, the digital transmission is free from interference from the analog FM signal. Moreover, the digital transmission is designed in such a manner that the interference caused thereby to the analog FM signal is kept at a minimal level.
摘要翻译：在用于通过相同的FM频带同播数字调制和模拟FM信号的系统，在所述的联播数字调制信号的模拟FM信号的影响被计算并且从它的传输之前后期信号取消。其结果是，该数字传输与从模拟FM信号的干扰。更上方，数字传输在由此引起的模拟FM信号的方式寻求DASS模干扰设计被保持在最低水平。

7. 发明公开

EP0138988A4 SIMULTANEOUS TRANSMISSION OF SPEECH AND DATA OVER AN ANALOG CHANNEL. 失效
标题翻译：模拟通道上的话音和数据的同步传输。
公开(公告)号：EP0138988A4
公开(公告)日：1988-04-11
申请号：EP84901669
申请日：1984-04-02
申请人： AMERICAN TELEPHONE & TELEGRAPH
发明人： NASH RANDY DAVID , WONG WAI CHOONG
IPC分类号： H04J1/00 , H04J1/20 , H04L27/34 , H04M11/06
CPC分类号： H04J1/20 , H04L27/3483 , H04M11/062
摘要： A technique for transmitting an entire analog speech signal (S(t)) and a modulated data signal (D(t)) over a transmission channel (20) such as a common analog telephone speech channel. The present technique multiplexes the entire modulated data signal within the normal analog speech signal frequency band where the speech is present and its signal power density characteristic is at a low level. Separation of the speech and data signals at the receiver (30) is effected by recovering the modulation carrier frequency (fc) and demodulating (33) the receiver signal (X(t)) to recover the data signal. The data signal is then remodulated (34) with the recovered carrier and is convolved with an arbitrary channel impulse response in an adaptive filter (35) whose output signal is subtracted (37) from the received composite data and speech signal (X(t)) to generate the recovered speech signal (S(t)). To improve the recovered speech signal, a least mean square algorithm (36) is used to update the arbitrary channel impulse response output signal of the adaptive filter (35).

8. 发明授权

EP1802067B1 Verfahren zur Übertragung von Sendedaten durch ein Teilnehmermodem 有权
标题翻译： Verfahren zurÜbertragungvon Sendedaten durch ein Teilnehmermodem
公开(公告)号：EP1802067B1
公开(公告)日：2017-05-03
申请号：EP07105843
申请日：2000-11-23
申请人： LANTIQ DEUTSCHLAND GMBH
发明人： STARNBERGER KLAUS
IPC分类号： H04J11/00 , H04L27/26 , H04B7/005 , H04J1/18 , H04J1/20 , H04L5/02 , H04L5/14 , H04L27/00 , H04M11/06
CPC分类号： H04W52/343 , H04L5/023 , H04L5/143 , H04L27/0008 , H04L27/2608 , H04M11/06 , H04W52/346

9. 发明公开

EP0825736A3 Simultaneous communication of analog frequency-modulated and digitally modulated signals using precanceling 失效
标题翻译：使用Vorlöschung从模拟频率并发消息发送调制和数字调制信号
公开(公告)号：EP0825736A3
公开(公告)日：2001-03-07
申请号：EP97306133.6
申请日：1997-08-12
申请人： LUCENT TECHNOLOGIES INC.
发明人： Papadopoulos, Haralabos C. , Sundberg, Carl-Erik Wilhelm
IPC分类号： H04J9/00 , H04H1/00 , H04J1/20 , H04L27/233
CPC分类号： H04H20/30 , H04H2201/183
摘要： In a system for simulcasting digitally modulated and analog FM signals over the same FM frequency band, the effect of the analog FM signal on the digitally modulated signal in the simulcast is calculated and canceled from the latter signal before its transmission. As a result, the digital transmission is free from interference from the analog FM signal. Moreover, the digital transmission is designed in such a manner that the interference caused thereby to the analog FM signal is kept at a minimal level.

10. 发明专利

JP3582845B2 Diversity transmission system 失效
公开(公告)号：JP3582845B2
公开(公告)日：2004-10-27
申请号：JP29871593
申请日：1993-11-29
申请人：コーニンクレッカフィリップスエレクトロニクスエヌヴィKoninklijke Philips Electronics N.V.
发明人：ゲオルグマリアデボットパウルス
IPC分类号： H04B7/12 , H04B7/08 , H04J1/20 , H04J11/00 , H04L1/06 , H04L27/26
CPC分类号： H04L27/2647 , H04B7/084 , H04B7/0865 , H04L1/06 , H04L27/2602
摘要： In a diversity transmission system the problem arises that almost no improvement can be obtained when the signals to be received show frequency selective fading within the band width of the signal to be transmitted. To solve this problem the signal to be received is separated by filter banks into a number of sub-band signals. Corresponding sub-band signals of different filter banks are combined by the combiners into combined sub-band signals. These combined sub-band signals are combined to a broad band signal by a final combiner.

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