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15 条记录 (耗时 0.016 秒)

    SYSTEM FOR ESTIMATING A NON-LINEAR CHARACTERISTIC OF AN AMPLIFIER
    1.
    发明授权
    SYSTEM FOR ESTIMATING A NON-LINEAR CHARACTERISTIC OF AN AMPLIFIER 有权
    DEVICE一个评价的助推器非线性特性的

    公开(公告)号：EP1258078B1

    公开(公告)日：2004-03-17

    申请号：EP00909248.7

    申请日：2000-02-24

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： PERTHOLD, Rainer ,  GERHÄUSER, Heinz ,  ULBRICHT, Gerald

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3247 ,  H03F2200/102

    摘要： In a method for estimating a non-linear characteristic of an amplifier (18), an input signal (10) is provided, a reference signal (20) is determined based on the power of the input signal (10), the input signal (10) is amplified using said amplifier (18) in order to produce an amplified signal (26), a measurement signal (22) is determined based on the power of the amplified signal (26) and respective samples of the measurement signal (22) are associated with respective samples of the reference signal (20). A gain value of said amplifier (18) for each sample is determined from the respective samples of the reference signal (20) and the measurement signal (22). An operating range of the amplifier is divided into a plurality of power sections and an averaged gain value is produced for each power section. Thereafter, a measure of the deviation of the gain values associated with a power section from said averaged gain value is determined. Then, averaged gain values are rejected which have a measure of the deviation which exceeds a predetermined threshold. Finally, an interpolation is performed using averaged gain values which have not been rejected in order to produce an estimation of said non-linear characteristic of said amplifier (18).

    VORRICHTUNG UND VERFAHREN ZUR VORBEHANDLUNG EINES UNTER VERWENDUNG EINES NICHTLINEAREN VERSTÄRKERS MIT VORGESCHALTETEM BANDPASSFILTER ZU ÜBERTRAGENDEN SIGNALS
    3.
    发明授权
    VORRICHTUNG UND VERFAHREN ZUR VORBEHANDLUNG EINES UNTER VERWENDUNG EINES NICHTLINEAREN VERSTÄRKERS MIT VORGESCHALTETEM BANDPASSFILTER ZU ÜBERTRAGENDEN SIGNALS 有权
    用于治疗使用非线性放大器与上游带通滤波器的信号的装置和方法将被发送

    公开(公告)号：EP1287612B1

    公开(公告)日：2006-12-06

    申请号：EP01933858.1

    申请日：2001-04-19

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： GERHÄUSER, Heinz ,  PERTHOLD, Rainer

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3247

    摘要： The invention relates to a device for pre-treating a signal (S1) to be transmitted via a transmission path, said transmission path having a band-pass filter (14) whose pass-through bandwidth is less than a predetermined bandwidth, and a non-linear amplifier (16). The device comprises a linearisation device (20) for linearising the signal (S1) to be transmitted prior to transmission, in such a way as to counteract the non-linearity caused by the non-linear amplifier (16). The device also comprises a signal conditioning device (22) which is connected downstream of the linearisation device (20). The frequency response of the signal conditioning device is such that the overall frequency response of the signal conditioning device (22) and the band-pass filter (14) corresponds to the frequency response of a filter whose pass-through bandwidth is at least equal to the predetermined bandwidth.

    FLAECHIGES KUEHLAGGREGAT MIT GEGENSTROMKUEHLUNG
    4.
    发明授权
    FLAECHIGES KUEHLAGGREGAT MIT GEGENSTROMKUEHLUNG 有权
    与GEGENSTROMKUEHLUNG平冷水机

    公开(公告)号：EP1547455B1

    公开(公告)日：2006-11-22

    申请号：EP03750305.9

    申请日：2003-09-02

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： PERTHOLD, Rainer ,  ARNETH, Stefan ,  WILD, Manfred ,  DUERST, Jochen ,  GERHAEUSER, Heinz

    IPC分类号： H05K7/20

    CPC分类号： H05K7/206

    摘要： The aim of the invention is to improve the performance of heat exchangers such that lost heat is discharged from a cabinet or device, whereby the rise of the inner temperature for each discharged watt of power loss is only slight. The invention also relates to a flat refrigerating set. The temperature of the heated air (SL) can be reduced in the counterflow (L4;L3;k1;k2...) by means of counterflowing cooling air (KL) without the cooling air physically entering into contact with the heated air flow (L1,L3,L5) that is to be cooled. The air flow to be cooled (SL) can be supplied to several parallel first chambers (k1,k3,k7) via an inlet area (13). The parallel first and parallel second chambers alternate in the direction of the height or density (h) of the refrigerating unit. The alternating chambers (k1,k2,k3,k4,...) also extend into a section of the flat cooling unit (l13), which is located between the inlet area (13) and a closer end (40,41) of the refrigerating unit.

    SYSTEM FOR PRE-DISTORTING AN INPUT SIGNAL FOR A POWER AMPLIFIER USING NON-ORTHOGONAL COORDINATES
    8.
    发明授权
    SYSTEM FOR PRE-DISTORTING AN INPUT SIGNAL FOR A POWER AMPLIFIER USING NON-ORTHOGONAL COORDINATES 有权
    DEVICE FOR A预失真输入信号功率放大器利用非正交坐标

    公开(公告)号：EP1258079B1

    公开(公告)日：2003-09-10

    申请号：EP00910707.9

    申请日：2000-02-24

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： PERTHOLD, Rainer ,  ULBRICHT, Gerald ,  GERHÄUSER, Heinz

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3241

    摘要： A circuit for pre-distorting an input signal v to be transmitted via a power amplifier having a non-linear transmission characteristic to produce a pre-distorted input signal y comprises an estimator (10) for determining an estimation signal (22) based on the power of said input signal v . A look-up table (20) is provided for storing complex pre-distortion coefficients BR and AI which depend on the power of the input Signal v and the non-linear transmission characteristic of the power amplifier determined in advance. For BR, the relation BR = AR - K, K being a constant with 0 v such that the distortion introduced by the non-linear transmission characteristic of the power amplifier is substantially compensated according to magnitude and phase. Finally, a pre-distorter is provided in order to pre-distort the input signal according to y = v • (K + BR + jAI).

    VORRICHTUNG UND VERFAHREN ZUM VORVERZERREN EINES ÜBER EINE NICHT-LINEARE ÜBERTRAGUNGSSTRECKE ZU ÜBERTRAGENDEN ÜBERTRAGUNGSSIGNALS
    9.
    发明授权
    VORRICHTUNG UND VERFAHREN ZUM VORVERZERREN EINES ÜBER EINE NICHT-LINEARE ÜBERTRAGUNGSSTRECKE ZU ÜBERTRAGENDEN ÜBERTRAGUNGSSIGNALS 有权
    FOR A预失真ON非线性传输路径的装置和方法是穿着传输信号

    公开(公告)号：EP1195005B1

    公开(公告)日：2003-04-02

    申请号：EP00931249.7

    申请日：2000-05-19

    申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

    发明人： PERTHOLD, Rainer ,  HOFMANN, Maximilian ,  ROGALSKY, Ingo ,  GERHÄUSER, Heinz

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3247 ,  H03F1/3252 ,  H03F3/24 ,  H03F2200/102 ,  H04L27/2614 ,  H04L27/2626 ,  H04L27/368

    摘要： The invention relates to a device for predistorting a transmission signal (S1) to be transmitted via a nonlinear transmission path (10), comprising an estimation device (14, 16) for detecting an error signal (S2') depending on the transmission signal (S1) and a previously detected transmission characteristic of the nonlinear transmission path (10). The error signal (S2') represents an estimation of the error generated by nonlinearity of the transmission path (10). A time-dispersive element (18) is provided in order to produce a correction signal (S3) by temporal extension of the error signal (S2'). A combiner (20) is provided in order to combine the transmission signal (S1) and the correction signal (S3). As a result of temporal extension of the error signal (S2'), an error signal fragment in the frequency spectrum of a transmission signal (S4) transmitted by the nonlinear transmission path (10) is displaced from the useful frequency range of the transmission signal.

    摘要翻译： 一种用于预失真发送信号是通过非线性传输路径反mitted装置包括估计器，用于误差信号取决于传输信号的确定性采矿和非线性传输路径的先前注册的传递特性的。误差信号darstellt产生的误差的估计值 由于反式任务路径的非线性。本发明提供一种时间离散元件由误差信号的时间扩展，以产生校正信号。 组合器被提供给传输信号和所述校正信号组合。 随着误差信号的时间扩展的结果，在由非线性传输路径mitted的发送信号的反式的频谱的误差信号段从所述发送信号的有用的频率范围移开。