公开(公告)号：EP2761746A1

公开(公告)日：2014-08-06

申请号：EP12835449.5

申请日：2012-09-26

申请人： Aviat Networks, Inc.

发明人： VANN, Emerick ,  CHAO, Yen-Fang ,  QIN, Youming ,  MATIAN, Roland

IPC分类号： H03H7/30

CPC分类号： H04L1/206 ,  H03C3/406 ,  H03D3/009 ,  H03D7/168 ,  H04B1/0014 ,  H04B1/10 ,  H04B1/16 ,  H04B1/28 ,  H04B1/30 ,  H04L1/0036 ,  H04L1/203 ,  H04L1/208 ,  H04L27/38 ,  H04L27/3854

摘要： Various embodiments provide for systems and methods for signal conversion of one modulated signal to another modulated signal using demodulation and then re-modulation. According to some embodiments, a signal receiving system may comprise an I/Q demodulator that demodulates a first modulated signal to an in-phase ("I") signal and a quadrature ("Q") signal, an I/Q signal adjuster that adaptively adjusts the Q signal to increase the signal-to-noise ratio (SNR) of a transitory signal that is based on a second modulated signal, and an I/Q modulator that modulates the I signal and the adjusted Q signal to the second modulated signal. To increase the SNR, the Q signal may be adjusted based on a calculated error determined for the transitory signal during demodulation by a demodulator downstream from the I/Q modulator.

公开(公告)号：EP1764912A3

公开(公告)日：2009-01-28

申请号：EP06120371.7

申请日：2006-09-08

申请人： ROKE MANOR RESEARCH LIMITED

发明人： Trinder, Julian Richard

IPC分类号： H03B27/00 ,  H03D3/00 ,  H03C3/40 ,  H04L27/38 ,  H04L27/36

CPC分类号： H03B27/00 ,  H03C3/406 ,  H03D3/009 ,  H04L27/364

摘要： A circuit architecture for generation of amplitude and phase matched signals is described, which is primarily intended for the generation of quadrature signals, for example local oscillator signals, as required in many electronic systems. Using a single reference signal as an input, two output signals are generated at the same frequency. The relative amplitudes of these signals contain phase error information. An error signal is derived by amplitude comparison, and then fed back to a phase control element in a closed loop manner. The method proposed ensures that when the output amplitudes are equal then the output signals will be in phase quadrature. All signal processing is performed at the fundamental frequency, enabling wider bandwidth and higher frequency operation to be achieved, than could otherwise be realised using standard circuits based on frequency dividers.

公开(公告)号：EP1632074A4

公开(公告)日：2007-04-25

申请号：EP04785738

申请日：2004-04-30

申请人： INTERDIGITAL TECH CORP

发明人： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC分类号： H03C3/40 ,  H04B1/30 ,  H04L27/00 ,  H04L27/34

CPC分类号： H04B1/30 ,  H03C3/406 ,  H04L2027/0016 ,  H04L2027/0018

摘要： A method and system for determining at least one DC offset compensation value used to suppress carrier leakage occurring on real and imaginary signal paths in an analog radio transmitter when a significant temperature change in the transmitter is detected. At least one DC offset signal having a level that corresponds to the at least one DC offset compensation value is provided to a digital DC offset compensation module which adjusts the DC level of at least one of the real and imaginary signal paths.

公开(公告)号：EP1449296A2

公开(公告)日：2004-08-25

申请号：EP02781469.8

申请日：2002-10-30

申请人： Koninklijke Philips Electronics N.V.

发明人： DUPERRAY, David, B.

IPC分类号： H03C1/00

CPC分类号： H04B1/0475 ,  H03C3/403 ,  H03C3/406

摘要： A transmitter chain has a quadrature modulator, a variable gain amplifier, an up-converter, and a variable gain power amplifier. An overall phase of the transmitter chain is adjusted on the basis of pre-stored phase information reflecting phase changes due to simultaneous gain changes of gains of at least the variable gain amplifier and the variable gain power amplifier.

公开(公告)号：EP1425846A2

公开(公告)日：2004-06-09

申请号：EP02774345.9

申请日：2002-09-12

申请人： Infineon Technologies AG

发明人： SIMON, Martin

IPC分类号： H03D1/00

CPC分类号： H03C3/406 ,  H03D7/165

摘要： Disclosed is a transmitter arrangement, especially for mobile radio, comprising a quadrature modulator (1) with an upstream digital signal processing unit (2). In order to curb sideband and carrier frequency which can occur as a result of over-large pairing tolerances of the components used, a feedback path (3) is provided in the inventive arrangement in order to couple the modulator output to the digital signal processing unit (2) and to provide the envelope of the transmitter signal in order to create pre-distortion in the digital signal processing unit (2). According to the invention, the envelope is provided by means of an AD-converter (12), preferably with undersampling, or by means of a down mixer (15), respectively in the feedback path (3).

公开(公告)号：EP0617532B1

公开(公告)日：2002-08-28

申请号：EP94302041.2

申请日：1994-03-22

申请人： Nokia Corporation

发明人： Tiittanen, Erkki ,  Mattila, Heikki ,  Rautava, Tapio ,  Matero, Jorma ,  Ostman, Kjell ,  Halttunen, Mikko

IPC分类号： H04L27/20

CPC分类号： H04L27/364 ,  H03C3/406 ,  H04B1/0475 ,  H04L27/2071

公开(公告)号：EP0661801B1

公开(公告)日：1998-09-23

申请号：EP94309180.1

申请日：1994-12-09

申请人： AT&T Corp.

发明人： Blodgett, James Russell

IPC分类号： H03D7/16 ,  H04L27/36

CPC分类号： H03C3/406 ,  H03C1/52 ,  H03D7/168 ,  H04L27/368

公开(公告)号：EP0588444A1

公开(公告)日：1994-03-23

申请号：EP93203126.3

申请日：1990-01-05

申请人： NEC CORPORATION

发明人： Nagata, Yoshinori, c/o NEC Corporation

IPC分类号： H04L27/36 ,  H03F1/32 ,  H04B1/62 ,  H03C5/00

CPC分类号： H04L27/368 ,  H03C1/06 ,  H03C1/50 ,  H03C3/02 ,  H03C3/08 ,  H03C3/406 ,  H03C5/00 ,  H03C2200/0058 ,  H03C2200/0079 ,  H03D1/2245 ,  H03D7/168 ,  H03F1/3247 ,  H03F1/3282 ,  H03F1/3294 ,  H03F2201/3233

摘要： A modulation system responsive to a sampled signal (31) of a sampling rate for supplying a modulated analog signal to an amplifier having nonlinearities to make the amplifier produce an amplified output signal, in which a processing arrangement (36) processes the signal with reference to a difference between the signal and an additional digital signal (35) to compensate for the nonlinearities to produce a processed signal. The processed signal is modulated into the modulated analog signal. The amplified output signal is demodulated and converted into the additional digital signal by a converter (40). Otherwise, the second control signal is produced. A controller (78) may control a phase of a sampling signal supplied to the converter so that a quotient of the difference by a differential of the selected signal becomes equal to zero.

摘要翻译： 响应于采样速率为在放大器供给的经调制的模拟信号，以具有非线性，使在放大的输出信号的放大器产生，其中处理装置（36），参照处理该信号到一个采样信号（31）的调制系统 的信号之间，并附加数字信号（35）的差来补偿非线性以产生经处理的信号。 处理后的信号被调制成调制的模拟信号。 放大后的输出信号进行解调并通过一个转换器（40）转换成附加的数字信号。 否则，该第二控制信号产生。 控制器（78）可以控制提供给转换器的采样信号的相位所以没有由所选择的信号的差分的差的商变为等于零。

公开(公告)号：EP0507919A1

公开(公告)日：1992-10-14

申请号：EP91919545.0

申请日：1991-09-10

申请人： MOTOROLA, INC.

发明人： GAILUS, Paul, H.

IPC分类号： H03G3 ,  H03C3 ,  H03G5

CPC分类号： H03G3/3036 ,  H03C3/406 ,  H03G5/24

摘要： Amplificateur à vitesse de réponse variable (26) dans l'étage d'entrée d'un circuit d'amplificateur (10) permettant de réduire l'interférence de la fréquence du canal décalé. Lorsque des séquences d'essai sont introduites dans un circuit d'amplificateur, pour servir à mesurer les niveaux d'entrée maximum autorisés pour l'amplificateur (34), l'introduction d'un amplificateur à faible vitesse de réponse dans la boucle d'entrée empêche ensuite la production d'une interférence de la fréquence du canal décalé provoquée par la séquence d'essai introduite. L'amplificateur à vitesse de réponse réglable (26) fonctionne à pleine vitesse de réponse, ce qui assure une amplification de toute la largeur de bande, pendant les périodes normales de fonctionnement du circuit.

公开(公告)号：EP1992090A1

公开(公告)日：2008-11-19

申请号：EP07786425.4

申请日：2007-07-30

申请人： ATMEL Duisburg GmbH

发明人： FRANKE, Reiner

IPC分类号： H04B17/00 ,  H03C3/00 ,  H04L27/36

CPC分类号： H04L27/36 ,  H03C3/406 ,  H04B17/21

摘要： The invention relates to a method for trimming an electronic system (200) in which n parameters (x, y) of the system (200) can be predetermined, which correspond to an n-dimensional trimming area, with two limit values (x0, XI y0, yl) being predetermined for each parameter (x, y) at the start of the trimming process, which limit values bound a corresponding output area (B_O) in the n-dimensional trimming area, and in which the following steps are repeated until a terminate condition is reached: - evaluation (100) of a target function which quantifies the reaching of a trimming target for the limit values (x0, xl, yϑ, yl), which bound the output area (B_O), with the evaluation comprising the measurement and/or evlauation of at least one physical variable of the system (200) which is dependent on the respective parameter (x, y) and/or its limit value (x0, xl, y0, yl), and with corresponding target function values associated with the limit values being obtained, - definition (110) of a changed, in particular reduced, output area (B_l, B_2) for a subsequent iteration as a function of the resultant target function values. According to the invention, the target function values are allocated to two different classes, with all the target function values which correspond to one target criterion being allocated to a first class, and with all the target function values which do not correspond to the target criterion being allocated to a second class, and with the changed output areas (B_l, B_2) being defined for the next iteration as a function of those target function values which are allocated to the first class.