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公开(公告)号：EP3182584A1
公开(公告)日：2017-06-21
申请号：EP15201303.3
申请日：2015-12-18
IPC分类号： H03D3/24
CPC分类号： H04L27/06 , H03D3/242 , H03L7/093 , H03L7/0991 , H03L7/101
摘要： This invention relates to a receiver comprising: a phase detector with a first and second input, the first input being adapted to receive a modulated input signal; a comparator comprising an input coupled to an output of the phase detector; a frequency-offset cancellation block comprising an input coupled to an output of the comparator. The receiver includes a digitally controlled oscillator comprising: a control input coupled to an output of the comparator and an output of the frequency-offset cancellation block; and an output coupled to the second input of the phase detector.
摘要翻译： 本发明涉及一种接收机，包括：具有第一和第二输入端的相位检测器，第一输入端适于接收调制输入信号; 比较器，包括耦合到所述相位检测器的输出的输入; 频率偏移消除块，包括耦合到比较器的输出的输入。 该接收器包括数字控制振荡器，该数字控制振荡器包括：耦合到比较器的输出端和频率偏移消除块的输出端的控制输入端; 以及耦合到相位检测器的第二输入的输出。
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公开(公告)号：EP1929643B1
公开(公告)日：2009-07-22
申请号：EP06810967.7
申请日：2006-09-25
IPC分类号： H04B1/38 , H04L27/227
CPC分类号： H04L27/2272 , H03C3/0966 , H03D3/242 , H04B1/38 , H04L27/2273 , H04L2027/0016 , H04L2027/0022 , H04L2027/0055 , H04W56/00 , H04W88/02 , Y02D70/1222 , Y02D70/40
摘要： A receiver has a first voltage control oscillator configured to generate a first oscillation signal, a second voltage control oscillator configured to generate a second oscillation signal having a first phase, a first phase comparator configured to detect a phase difference between the first and second oscillation signals, a demodulator configured to perform demodulation processing of the received signal and to generate timing information of a second phase included in the first oscillation signal, a second phase comparator configured to detect the phase difference between the first and second oscillation signals, and a first control voltage generator configured to generate a first control voltage for controlling a phase and a frequency of the second voltage control oscillator based on the phase difference detected by the second phase comparator.
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公开(公告)号：EP0529618B1
公开(公告)日：1998-11-04
申请号：EP92114612.2
申请日：1992-08-27
申请人： NEC CORPORATION
CPC分类号： H03D3/242 , H03D1/2254 , H03D2200/0031
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4.发明公开Frequenzdetektor zur Trägerfrequenzsynchronisation 失效Frequenzdetektor zurTrägerfrequenzsynchronisation
公开(公告)号：EP0719015A2
公开(公告)日：1996-06-26
申请号：EP95114845.1
申请日：1995-09-21
申请人： ROBERT BOSCH GMBH
IPC分类号： H04L27/227
CPC分类号： H04L27/0014 , H03D3/242 , H04L2027/0053 , H04L2027/0065
摘要： Frequenzdetektor zur Trägerfrequenzsynchronisation in Empfängern für digitale Datenübertragung, wobei dem Frequenzdetektor In-Phase-Komponente und Quadratur-Komponente des demodulierten Empfangssignal eingegeben wird, in welchem die Signalterme der doppelten Frequenz unterdrückt sind und welche aus dem Produkt des Empfangssignals mit dem Signal des spannungsgesteuerten Oszillators (VCO) der Frequenzregelschaltung entstanden sind und wobei das Ausgangssignal des Frequenzdetektors als Steuersignal uf für den VCO verwendet wird, wobei Kaskaden von komplexen Bandpässen mit reellen oder komplexen Vorentzerrern (VE) vorgesehen sind, durch welche der Realteil x und der Imaginärteil y des demodulierten Eingangssignals jeweils vor der Bandpaßfilterung vorentzerrt werden, und wobei eine Verknüpfungsschaltung vorgesehen ist, mittels der die Ausgangssignale der Kaskaden zu dem Steuersignal uf verknüpft werden, in dem durch Quadrieren oder Multiplizieren der Ausgangssignale Maße für die Leistung ermittelt werden, die anschließend voneinander subtrahiert werden und so das Steuersignal uf ergeben, dadurch gekennzeichnet, daß mindestens zwei Kaskaden aus je einem Vorverzerrer (VE) und einem Bandpaß vorgesehen sind, deren Mittenfrequenzen jeweils unterschiedliche Betragswerte aufweisen und im Frequenzbereich der einen Nyquistflanke des Leistungsdichtespektrums des demodulierten Empfangssignals liegen. Einsatz insbesondere bei Mobilfunkanlagen, dabei Verbesserung der Trägersynchronisation insbesondere mit Patternjitter-Unterdrückung bei Offset-Modulation.
摘要翻译： 频率检测器接收解调的接收信号的同相和正交分量，并为插入在频率调节电路中的压控振荡器提供控制信号（Uf）。 频率检测器使用至少2个级联的复带通滤波器，其频率范围对应于接收信号的功率分布频谱的奈奎斯特侧面和实际或复合预均衡器，来自级联的输出组合以提供控制信号。
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公开(公告)号：EP0238141A1
公开(公告)日：1987-09-23
申请号：EP87200471.8
申请日：1987-03-13
发明人： Horvat, Philippe
IPC分类号： H03D3/24
CPC分类号： H03D3/242
摘要： Récepteur de signaux modulés en fréquence comprenant un circuit (10 à 60) de sélection de canal et de fréquence intermédiaire, un démodulateur de fréquence (120 à 140) à boucle à verrouillage de phase, et une connexion de retour vers ledit circuit de sélection de canal pour constituer une boucle à verrouillage de fréquence. Ce récepteur comporte également un étage de correction de tension de commande comprenant lui-même d'une part un comparateur (70) des signaux délivrés respectivement, par l'intermédiaire de diviseurs (80, 100), par l'oscillateur (120) de la boucle à verrouillage de phase et par un oscillateur de référence (90), et d'autre part au moins un intégrateur prévu en sortie dudit comparateur et dont la sortie est reliée à la fois à l'entrée de l'oscillateur (30) de la boucle à verrouillage de fréquence et à un additionneur (150) inséré dans la boucle à verrouillage de phase entre la sortie du démodulateur et l'oscillateur (120) de cette boucle.
Application : Réception des émissions de télévision transmises par satellites-
公开(公告)号：EP0701746B1
公开(公告)日：1997-03-12
申请号：EP94918781.9
申请日：1994-05-25
发明人： ARMBRUSTER, Veit
CPC分类号： H04N5/4446 , H03D1/2254 , H03D3/242 , H03D5/00 , H03D2200/0082 , H03J1/0008 , H04B7/18523 , H04N5/4401 , H04N5/455 , H04N7/20 , H04N21/6112 , H04N21/6143
摘要： During terrestrial television reception, in general a first conversion into a first intermediate frequency is followed by another conversion into a second intermediate frequency. During satellite television reception, a FM-PLL-demodulator extracts the baseband signal from the satellite signal converted into a first intermediate frequency. For that purpose, two separate tuners are generally used. The object of the invention is to create a common tuner both for terrestrial and satellite television reception with as little circuitry as possible. The second mixing stage (M2) is switched as a mixer for conversion into the second intermediate frequency during terrestrial television reception and is switched as a component of a FM-PLL-demodulator (30) during satellite television reception. The invention is particularly suitable for television receivers and videorecorders which selectively receive the signal of a terrestrial antenna and of a satellite antenna.
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公开(公告)号：EP0425267B1
公开(公告)日：1996-01-31
申请号：EP90311647.3
申请日：1990-10-24
发明人： Sakashita, Seiji , Ozeki, Hiroaki , Kanno, Ippei
CPC分类号： H03D3/244 , H03D3/242 , H04B1/1638
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公开(公告)号：EP0529618A1
公开(公告)日：1993-03-03
申请号：EP92114612.2
申请日：1992-08-27
申请人： NEC CORPORATION
CPC分类号： H03D3/242 , H03D1/2254 , H03D2200/0031
摘要： A non-coherent demodulator 1 multiplies a modulated intermediate frequency (IF) signal with a signal from a local oscillator 2 to produce a first pseudo baseband signal having error. The first pseudo baseband signal is supplied to a wide band PLL type demodulator 15. A low-pass filter 26 removes noise component from a first control signal from a loop filter 19 in the wide band PLL type demodulator 15 to produce a second control signal. Multipliers 24 and 25 multiply the first pseudo baseband signal with an output of a voltage-controlled oscillator 27 controlled by a second control signal to produce a second pseudo baseband signal having smaller frequency error. The second pseudo baseband signal is supplied to a narrow band demodulator 14 and converted into a baseband signal.
摘要翻译： 非相干解调器1将调制中频（IF）信号与来自本地振荡器2的信号相乘，以产生具有误差的第一伪基带信号。 第一伪基带信号被提供给宽带PLL型解调器15.低通滤波器26从宽带PLL型解调器15中的来自环路滤波器19的第一控制信号中去除噪声分量，以产生第二控制信号。 乘法器24和25将第一伪基带信号与由第二控制信号控制的压控振荡器27的输出相乘，以产生具有较小频率误差的第二伪基带信号。 第二伪基带信号被提供给窄带解调器14并被转换成基带信号。
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公开(公告)号：EP0425267A3
公开(公告)日：1992-05-27
申请号：EP90311647.3
申请日：1990-10-24
发明人： Sakashita, Seiji , Ozeki, Hiroaki , Kanno, Ippei
CPC分类号： H03D3/244 , H03D3/242 , H04B1/1638
摘要： Radio waves used in broadcasting and communications making use of broadcasting satellite and communication satellite are FM signals, and the frequency shift and exclusive bandwidth vary depending on the modulation signal. The satellite broadcasting receiver is designed to control the frequency shift so that the amplitude of the demodulation signal be constant, thereby making uniform the bandwidth of the intermediate frequency filter, so as to be capable of receiving by one filter. At this time, the frequency shift can be controlled continuously, from large to small one, in a predetermined exclusive bandwidth. When further expandlng the frequency shift, since the exclusive bandwidth is extended, and the noise electric power is increased and the receiving sensitivity is lowered as compared with the exclusive machine. Accordingly, when expanding the frequency shift, the noise bandwidth is narrowed in the PLL demodulator, thereby enhancing the receiving sensitivity.
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公开(公告)号：EP1178604A1
公开(公告)日：2002-02-06
申请号：EP01108185.8
申请日：2001-03-30
申请人： Icom Incorporated
发明人： Sakurai, Kiyoshi
摘要： An FM modulated signal is mixed with a pair of first local signals to be converted to a pair of base band signals by mixers (4I,4Q). The base band signals are respectively mixed with a pair of second local signals by mixers (8I,8Q). The resultant signals are added by an adder (12), thereby yielding an IF signal which is in turn detected. The local oscillator (11) generates a reference signal whose frequency is a predetermined number of times higher than the frequency of a carrier component of the IF signal and generates a second local signal by frequencing-dividing the reference signal. The frequency of the first local signal converges to the one that has a given ratio to the frequency of the reference signal.
摘要翻译： FM调制信号与一对第一本地信号混合，以通过混频器（4I，4Q）转换成一对基带信号。 基带信号分别通过混频器（8I，8Q）与一对第二本地信号混合。 所得到的信号由加法器（12）相加，从而产生继而被检测的IF信号。 本地振荡器（11）生成频率比IF信号的载波分量的频率高出预定次数的参考信号，并通过对参考信号进行频率分频来产生第二本地信号。 第一本地信号的频率收敛于与参考信号的频率具有给定比率的频率。
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