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    Signal transmission system and a transmitter and a receiver for use in the system
    71.
    发明公开
    Signal transmission system and a transmitter and a receiver for use in the system 失效
    Signalsendeanlage und in der Anlage verwendeter Sender undEmpfänger。

    公开(公告)号：EP0210688A2

    公开(公告)日：1987-02-04

    申请号：EP86201177.2

    申请日：1986-07-04

    申请人： PHILIPS ELECTRONICS UK LIMITED ,  Philips Electronics N.V.

    发明人： Marshall, Christopher Brian

    IPC分类号： H03C1/00 ,  H03D1/00 ,  H04B1/68 ,  H04B7/12 ,  H04L5/26

    CPC分类号： H04B7/12 ,  H03C1/00 ,  H03D1/00 ,  H04B1/68 ,  H04L5/26

    摘要： A signal transmission system which is particularly suitable for the employment of direct conversion receivers has a block of adjacent transmission frequency bands allocated to it. Each signal channel is split into two sub-channels or parts occupying mutually different frequency bands for transmission and the bands occupied by the sub-channels of the various channels are interleaved. In the receiver the local oscillator is tuned midway between the bands corresponding to the sub-channels of the wanted channel and the corresponding signals are recovered by bandpass filtering, phase-shifting, summing and differencing, demodulating and combining the frequency down-converted outputs of quadrature related mixers to which the received and the local oscillator signals are applied. Although d.c. block capacitors are used in the outputs of the mixers, these can have a low value because the notch formed in the transmission frequency characteristic does not affect the reception of the required signals, so that the receiver can settle rapidly at switch-on.

    摘要翻译： 特别适用于使用直接转换接收机的信号传输系统具有分配给它的相邻传输频带的块。 每个信道被分成两个子信道或占用相互不同的频带的部分用于传输，并且由各个信道的子信道占据的频带被交织。 在接收机中，本地振荡器在对应于所需信道的子信道的频带之间的中间调谐，相应的信号通过带通滤波，相移，求和和差分来恢复，解调和组合频率下变频输出 应用接收和本地振荡器信号的正交相关混频器。 虽然 在混频器的输出端使用块电容器，因为在传输频率特性中形成的陷波不影响所需信号的接收，所以这些可以具有低的值，使得接收器可以在接通时快速地稳定。

    PROCEDE DE MODULATION D'UNE ONDE HYPERFREQUENCE, SYSTEME D'EMISSION METTANT EN OEUVRE CE PROCEDE ET RADAR COMPORTANT UN TEL SYSTEME
    74.
    发明公开
    PROCEDE DE MODULATION D'UNE ONDE HYPERFREQUENCE, SYSTEME D'EMISSION METTANT EN OEUVRE CE PROCEDE ET RADAR COMPORTANT UN TEL SYSTEME 审中-公开
    用于调制超声波的方法，使用该超声波的传输系统以及包括这种系统的雷达

    公开(公告)号：EP3301471A1

    公开(公告)日：2018-04-04

    申请号：EP17188663.3

    申请日：2017-08-31

    申请人： Thales

    发明人： GARREC, Patrick ,  HODE, Jean-Michel ,  MONTIGNY, Richard

    IPC分类号： G01S7/02 ,  G01S7/282 ,  H03C1/00 ,  H03K3/00 ,  G01S7/03

    CPC分类号： G01S7/282 ,  G01S7/023 ,  G01S7/032 ,  H03C3/08 ,  H03K3/00 ,  H03K5/04

    摘要： L'onde étant émise au moyen d'une antenne (20) constituée d'un réseau d'éléments rayonnants (21, 22), on émet deux ondes en impulsions modulées chacune par une loi de déphasage (251, 261) dite déphasage de modulation, les déphasages étant en opposition, une première onde étant émise par un sous-réseau d'éléments rayonnants dits impairs (21) et la deuxième onde étant émise par un deuxième sous-réseau d'éléments rayonnants dits pairs (22), les deux sous-réseaux étant entrelacés, l'onde émise étant la combinaison de ladite première onde et de la dite deuxième onde.

    摘要翻译： 波被通过由辐射元件的阵列的天线（20）的装置发射（21 22）输出两个脉冲波的每个由一个相移法调制（251,261），所述相移 调制时，相移在反对是，第一波长由所述奇辐射元件（21）和所述第二波长被所述对等体的辐射元件（22）的第二子网络发出的一个子网络发射，该 两个子网络是交错的，发射波是所述第一波和所述第二波的组合。

    METHOD AND CIRCUIT FOR AMPLITUDE MODULATION OF A CARRIER SIGNAL WITH A SPECIFIED MODULATION FACTOR
    77.
    发明公开
    METHOD AND CIRCUIT FOR AMPLITUDE MODULATION OF A CARRIER SIGNAL WITH A SPECIFIED MODULATION FACTOR 审中-公开
    方法与电路与指定的调制系数的载波信号的幅度调制

    公开(公告)号：EP2419857A1

    公开(公告)日：2012-02-22

    申请号：EP10712183.2

    申请日：2010-02-23

    申请人： Austriamicrosystems AG ,  IDS D.O.O.

    发明人： KUNC, Vinko ,  STIGLIC, Maksimilijan

    IPC分类号： G06K7/00 ,  G06K7/08 ,  H03C1/00 ,  H03K7/02

    CPC分类号： G06K7/0008 ,  G06K7/10217 ,  G06K7/10336 ,  H03C1/08

    摘要： An amplitude of a carrier signal at an output of an impedance matching block is measured as a first amplitude value. A value of the signal amplitude at the output of the impedance matching block is calculated as a second amplitude value that a signal resulting from amplitude modulation with said modulation factor from said carrier signal should assume, said carrying signal having an amplitude with the first amplitude value. A setting of a transmitter is changed to decrease the carrier signal amplitude at the output of the impedance matching block. An amplitude of a new carrier signal at the output of the impedance matching block is measured as a new amplitude value. The transmitter setting keeps changing so many times until the new amplitude value is equal to or lower than said second amplitude value or within a predetermined tolerance range around said second amplitude value. Parameters of the last new transmitter setting are stored as the parameters of the transmitter setting, by means of which the transmitter will generate a transmitted signal being amplitude-modulated in the specified manner. The setting of the amplitude modulation with the specified modulation factor is carried out automatically. The designing of the transmitter circuit is simplified.

    A DIRECT DIGITAL AMPLITUDE MODULATOR
    78.
    发明授权
    A DIRECT DIGITAL AMPLITUDE MODULATOR 有权
    直接数字幅度调制器

    公开(公告)号：EP1338085B1

    公开(公告)日：2009-02-11

    申请号：EP01981251.0

    申请日：2001-11-01

    申请人： Infineon Technologies AG

    发明人： YUAN, Jiren ,  ZHOU, Yijun

    IPC分类号： H03C1/00

    CPC分类号： H03C1/547 ,  H03C1/36 ,  H04L27/36

    摘要： This invention provides various embodiments of a direct digital amplitude modulator (DDAM) for modulating radio frequency (RF) or intermediate frequency (IF) or baseband signal with the invented interpolation technique. The interpolation technique greatly reduces the amplitudes of alias signals without using an analog filter. The invention therefore is significant for various communication transmitters to achieve simple structure, good linearity and high power efficiency.