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    • 1. 发明授权
    • Radio receiver comprising analog dynamic compression and digital
expansion
    • 无线电接收机包括模拟动态压缩和数字扩展
    • US5375255A
    • 1994-12-20
    • US939254
    • 1992-09-02
    • Alfred BaierGerd Heinrich
    • Alfred BaierGerd Heinrich
    • H04B1/06H03G7/00H03M1/00H04B1/30H04B1/62H04B14/04H04L25/03H04B1/16
    • H03G7/007H03G7/00H04B1/30
    • A radio receiver for an RF signal which is phase or frequency modulated by an information signal. The receiver has an analog receiving section which provides non-linear dynamic compression. The resulting analog signal is sampled and the samples are digitized by an A/D converter. The non-linear dynamic compression reduces the necessary number of quantizing steps in the A/D converter, which is less expensive, but thereby introduces non-linear distortion. To compensate such distortion, in the digital processing section of the receiver an expansion section is provided which processes the digital signal samples in accordance with the inverse of the non-linear dynamic compression characteristic. The resulting expanded digital sample values equalize the analog non-linear dynamic compression. The information signal is recovered from the expanded digital signals.
    • 用于由信号信号进行相位或频率调制的RF信号的无线电接收机。 该接收器具有提供非线性动态压缩的模拟接收部分。 所得到的模拟信号被采样,样本由A / D转换器数字化。 非线性动态压缩减少了A / D转换器中必要数量的量化步骤,其成本较低,从而引入非线性失真。 为了补偿这种失真,在接收机的数字处理部分中,提供扩展部分,其根据非线性动态压缩特性的倒数处理数字信号样本。 所得到的扩展的数字样本值使模拟非线性动态压缩相等。 从扩展的数字信号中恢复信息信号。
    • 3. 发明授权
    • Circuit arrangement for forming the sum of products
    • 形成产品总和的电路布置
    • US5650952A
    • 1997-07-22
    • US695951
    • 1996-08-13
    • Alfred BaierJohannes SchuckDirk Weinsziehr
    • Alfred BaierJohannes SchuckDirk Weinsziehr
    • G06F7/50G06F7/509G06F7/544G06F7/00
    • G06F7/5095G06F7/5443
    • In processors, notably digital signal processors, it is often necessary to form the sum of products of a concatenation of data word pairs, for example for correlation or convolution operations, in which the one data word of each pair can assume only one of the two values +1 or -1. In accordance with the invention, in that case instead of forming a product in a multiplier, the one data word of each pair is applied to an add/subtract device in order to control the function thereof in respect of addition or subtraction; one input of the add/subtract unit then receives the other data words of the data word pairs, and the other input is connected to the output of the accumulator register. Thus, a complex multiplier device is saved or, should such a device be present anyway, it will not be used so that the power loss of the processor is reduced.
    • 在处理器中,特别是数字信号处理器,通常需要形成数据字对的级联的和,例如用于相关或卷积运算,其中每对的一个数据字只能承担两个中的一个 值+1或-1。 根据本发明,在这种情况下,代替在乘法器中形成乘积,每对中的一个数据字被应用于加法/减法器件,以便控制加法或减法的功能; 然后,加/减单元的一个输入接收数据字对的其他数据字,另一个输入连接到累加器寄存器的输出。 因此,保存复数乘法器装置,或者如果这样的装置出现,则不会使用它,以致减少了处理器的功率损耗。
    • 5. 发明授权
    • Receiver for time-varying distorted signals
    • 接收器用于时变信号失真
    • US5185764A
    • 1993-02-09
    • US564223
    • 1990-08-07
    • Alfred Baier
    • Alfred Baier
    • H04L27/14H04B7/005H04L25/02H04L25/03H04L27/01
    • H04L25/03019H04L25/0236
    • A receiver for time-varying distorted data signals, includes an equalizer and a channel estimator which generates a channel information signal with the aid of a training signal sent together with the data signal and with the aid of an image of the training signal stored in the receiver, and applies this signal to the equalizer. The receiver further includes an arrangement for channel tracking which generates correction values for the channel information signal with the aid of data detected by the equalizer. At very high relative velocities between the sender and the receiver (e.g. 200 km/h when using the mobile radio set in a motor vehicle, for example) a degradation of the bit error rate is avoided in that, at least part of or the complete received training signal is applied to the arrangement for channel tracking prior to the data signals to be equalized and detected after the channel information determined on the basis of the training signal has been transmitted.
    • 用于时变失真数据信号的接收机包括均衡器和信道估计器,该信号估计器借助于与数据信号一起发送的训练信号并借助于存储在该信号中的训练信号的图像来生成信道信息信号 接收器,并将该信号应用于均衡器。 接收机还包括用于信道跟踪的装置,其借助于由均衡器检测的数据产生信道信息信号的校正值。 在发送器和接收器之间的非常高的相对速度(例如,例如在使用机动车辆中的移动无线电设备时为200km / h)时,避免了误码率的降低,因为至少部分或完全的 在已经发送了基于训练信号确定的信道信息之前,将接收到的训练信号应用于要均衡和检测的数据信号之前的信道跟踪装置。
    • 6. 发明授权
    • Arrangement for equalizing and demodulating binary continuous-phase
angle-modulated data signals with modulation index 0.5
    • 用于均衡和解调调制指数为0.5的二进制连续相角调制数据信号的布置
    • US5014283A
    • 1991-05-07
    • US377367
    • 1989-07-07
    • Alfred Baier
    • Alfred Baier
    • H04B3/06H04B3/14H04L27/14H04L27/18H04L27/22
    • H04L27/22
    • A preprocessing unit is inserted between a baseband converter and an equalizer/detector for performing a signal processing which corresponds to a phase rotation of the CPM-signal in the baseband represented by in phase and quadrature components. The phase rotation progresses in discrete steps of 90.degree. per bit interval of the binary data signal contained in the CPM-signal. The introduction of the preprocessing unit renders it possible to use a comparatively simple conventional equalizer/detector for binary pulse amplitude modulated signals (PAM-signals) for equalizing and detecting binary CPM-signals received in distorted form. When the equalizer/detector is adaptive, a further preprocessing unit is inserted between a channel estimator and adjusting inputs of the equalizer/detector.
    • 在基带转换器和均衡器/检测器之间插入预处理单元,用于执行对应于由同相和正交分量表示的基带中的CPM信号的相位旋转的信号处理。 相位旋转以包含在CPM信号中的二进制数据信号的每个位间隔的90度的离散步长进行。 预处理单元的引入使得可以使用用于二进制脉冲幅度调制信号(PAM信号)的相对简单的常规均衡器/检测器来均衡和检测以失真形式接收的二进制CPM信号。 当均衡器/检测器是自适应的时,在信道估计器和均衡器/检测器的调整输入之间插入另外的预处理单元。