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    • 6. 发明申请
    • PROCESS FOR ADAPTIVE COMPENSATION OF ECHOES IN A COMMUNICATION SYSTEM
    • 通信系统中ECHOES自适应补偿的过程
    • WO1989005068A1
    • 1989-06-01
    • PCT/EP1988001061
    • 1988-11-23
    • SIEMENS AKTIENGESELLSCHAFT ÖSTERREICHSIEMENS AKTIENGESELLSCHAFTTSCHIRK, Wolfgang
    • SIEMENS AKTIENGESELLSCHAFT ÖSTERREICHSIEMENS AKTIENGESELLSCHAFT
    • H04B03/23
    • H04B3/231H04B3/237H04M9/082
    • An echo compensator (EK) for the autonomous speech system of a mobile telephone contains a digital signal processor (DSP) connected via analog/digital converters (A/D) to the emission and reception lines (SL, EL) in the low-frequency section of the mobile telephone. The acoustic and line-side electric echo is adaptively compensated. The relevant compensation value (c, c') is subtracted from the emission value (c) and the reception value (e). The acoustic and electric compensation value (c, c') is established in the corresponding adaptive filter (AF, AF'). The acoustic compensation value (c) is established by scalar multiplication of a summation vector obtained from previously scanned reception values (e) with a coefficient vector. The latter is determined from the previous coefficient vector by adding the product of the summation vector, divided by the energy of the reception signal, and the emission value(s) reduced by the acoustic compensation value (c). The compensation of the electric echo is carried out in a similar manner. Good echo compensation is thereby achieved with relatively few circuits and the emission signal is only delayed by approximately 128 mu s for the compensation of the electric echo and approximately 8 ms for the compensation of the acoustic echo.
    • 用于移动电话的自主语音系统的回波补偿器(EK)包含经由模拟/数字转换器(A / D)连接到低频发射和接收线路(SL,EL)的数字信号处理器(DSP) 部分移动电话。 声和线侧电回声被自适应地补偿。 从发光值(c)和接收值(e)中减去相关的补偿值(c,c')。 在相应的自适应滤波器(AF,AF')中建立声和电补偿值(c,c')。 声学补偿值(c)通过从先前扫描的接收值(e)获得的求和矢量与系数矢量的标量乘法来建立。 后者通过将求和矢量的积除以接收信号的能量与由声学补偿值(c)减小的发射值相加,从先前的系数向量确定。 电回声的补偿以类似的方式进行。 因此通过相对较少的电路实现良好的回波补偿,并且发射信号仅延迟约128μs用于补偿电回声,并且大约8ms用于声学回声的补偿。
    • 10. 发明申请
    • POWER PACK
    • 电源
    • WO1998004026A1
    • 1998-01-29
    • PCT/AT1997000163
    • 1997-07-10
    • SIEMENS AKTIENGESELLSCHAFT ÖSTERREICHSCHWEIGERT, HaraldKRANISTER, Andreas
    • SIEMENS AKTIENGESELLSCHAFT ÖSTERREICH
    • H02J09/06
    • H02J9/061Y10T307/615
    • A power pack for supplying a consumer connected to the direct voltage branch of the power pack directly or through a d.c. voltage changer has a buffer capacitor (C) that can be loaded from the supply network and which continues to supply for a set minimum time the direct voltage branch in the event of a power failure or outage. The buffer capacitor (C) can be loaded through its own loading circuit (3) up to a voltage which is substantially constant, whatever the voltage oscillations in the direct voltage branch, and which substantially corresponds to the top threshold value of the direct voltage (U1) for which the power pack is sized. The buffer capacitor can be connected to the direct voltage branch by a controlled switch (S) when voltage drops in the network or in the direct voltage branch.
    • 用于直接或通过转换器供给到所述电源外部消费者的直接电压支路,用来自网络缓冲器电容器(C),其仍与主电源故障供给直流电压分支或-einbruch一定的时间最小周期的可再充电,其特征在于,所述缓冲电容器的电源单元(C) 单独的充电电路(3)被充电到电压(U2),其 - 不论在直流电压分支电压波动的 - 是基本恒定的并且基本上直流电压(U1)的上限值对应于电源单元的尺寸,和缓冲电容器 通过在网络中或在直流电压分支的直流电压分支在欠压的情况下的控制的开关(S)是可连接的。