公开(公告)号：US4389616A

公开(公告)日：1983-06-21

申请号：US217519

申请日：1980-12-15

申请人： Heinz Gockler ,  Hagen Hofmeister

发明人： Heinz Gockler ,  Hagen Hofmeister

IPC分类号： H04L27/227 ,  H04L27/22

CPC分类号： H04L27/2272

摘要： A method for digitally regulating the residual carrier phase error in receivers of digital data transmission systems. A comparator compares the sampled data signal or value of the carrier demodulated input signal to the receiver with the estimated value for each associated sampling time or moment as provided by a decider, to determine the deviation dk which is a measure for the phase difference between the sampled value and the associated estimated value. This deviation dk is filtered in a digital loop filter, including a proportional branch and an integration branch, and a regulating value for the demodulated input signal is obtained from a subsequently connected accumulator. A non-linear limitation on the deviation dk is included in the integration branch of the digital loop filter.

摘要翻译： 一种用于数字调节数字数据传输系统接收机中的载波相位误差的方法。 比较器将采样的数据信号或载波解调输入信号的值与接收机进行比较，其中每个相关采样时间或时刻的估计值由判定器提供，以确定偏差dk，该偏差是对 采样值和相关估计值。 该偏差dk在包括比例分支和积分分支的数字环路滤波器中被滤波，并且从随后连接的累加器获得解调输入信号的调节值。 偏差dk的非线性限制包含在数字环路滤波器的积分分支中。

公开(公告)号：US4408327A

公开(公告)日：1983-10-04

申请号：US188991

申请日：1980-09-22

申请人： Helmut Wahl ,  Hagen Hofmeister

发明人： Helmut Wahl ,  Hagen Hofmeister

IPC分类号： G06F1/12 ,  G06F1/04 ,  G05B19/02 ,  G06F9/00 ,  H03K5/13

CPC分类号： G06F1/12

摘要： A method for synchronizing switching mechanisms or program sequences to an external frame clock pulse, wherein after a given period of time the switching mechanism or program is enabled to be reset and that after this enabling the resetting takes place with the edge of an external clock pulse. Moreover, the resetting takes place immediately after enabling if the edge of the external clock pulse has appeared earlier in time and the resetting takes place in any case no later than after a further given period of time even if the edge of the external clock pulse has not arrived. An apparatus for carrying out the method is also disclosed.

摘要翻译： 一种用于将切换机制或程序序列同步到外部帧时钟脉冲的方法，其中在给定时间段之后，切换机构或程序能够被复位，并且在此之后，能够利用外部时钟脉冲的边沿进行复位 。 此外，如果外部时钟脉冲的边沿及时出现，则在启动之后立即进行复位，并且在任何情况下都不迟于在进一步给定的时间段之后进行复位，即使外部时钟脉冲的边沿具有 不到 还公开了一种用于执行该方法的装置。

公开(公告)号：US4389722A

公开(公告)日：1983-06-21

申请号：US186631

申请日：1980-09-12

申请人： Hagen Hofmeister

发明人： Hagen Hofmeister

IPC分类号： F16H59/02 ,  H04L5/02 ,  H04J3/06

CPC分类号： H04L5/02

摘要： A method for simultaneously transmitting a plurality of data streams over one transmission channel with the aid of modems, wherein in order to synchronize the receiver for the purpose of device-specific modulation, a small additional modulation is applied in the transmitter, with the frequency of the additional modulation being equal to the transmitter modulation rate divided by a whole number, and the additional modulation is demodulated in the receiver by multiplying the associated values obtained from the scanning clock pulse by the difference between the associated and actual values received, and the resulting parameter is freed of interference with the aid of a band pass filter or a phase control loop.

摘要翻译： 一种借助于调制解调器在一个传输信道上同时发送多个数据流的方法，其中为了同步用于设备特定调制的接收机，在发射机中应用小的附加调制，频率为 附加调制等于发射机调制速率除以整数，并且在接收机中通过将从扫描时钟脉冲获得的相关值乘以所接收的相关联和实际值之间的差异来解调附加调制，并且由此得到 借助带通滤波器或相位控制环路，参数可以消除干扰。

公开(公告)号：US4327439A

公开(公告)日：1982-04-27

申请号：US136733

申请日：1980-04-02

申请人： Heinz Gockler ,  Hagen Hofmeister

发明人： Heinz Gockler ,  Hagen Hofmeister

IPC分类号： H04L27/00 ,  H04L27/20 ,  H04L27/227 ,  H04L27/36 ,  H03K7/10 ,  H04L5/12

CPC分类号： H04L27/2273 ,  H04L27/0008 ,  H04L27/2089 ,  H04L27/365

摘要： A method for generating modem transmission signals with quadrature amplitude modulation (QAM) wherein scanned values of elementary bandpass signals are stored in digitally coded form, the elementary bandpass signals are weighted with coefficients depending on the information to be transmitted and the modem transmission signals are formed by superposition of the thus weighted elementary bandpass signals; and wherein in the case of n-PSK modulation, where n=4, 8, 12, 16 . . . , the phase positions of all elementary bandpass signals are selected such that the phase diagram is symmetrical to the axis .phi.=0, and no elementary bandpass signal coincides with the axis .phi.=0; 1/4n elementary bandpass signals, which cannot be derived from any other bandpass signal of phase diagram neither due to symmetry with the axis .phi.=0 or the axis .phi.=90.degree., respectively, nor by symmetry to the origin of the diagram, are stored in a digital memory; and the remaining, e.g. 3/4n, elementary bandpass signals are obtained by weighting the stored elementary bandpass signals with +1 or -1, respectively, and/or reading out the memory in a forward or a backward direction, respectively.

摘要翻译： 一种用于生成具有正交幅度调制（QAM）的调制解调器传输信号的方法，其中基本带通信号的扫描值以数字编码形式存储，基本带通信号根据要发送的信息被加权，并且形成调制解调器传输信号 通过叠加如此加权的基本带通信号; 并且其中在n-PSK调制的情况下，其中n = 4,8,12,16。 。 。 选择所有基本带通信号的相位位置，使得相位图对称于轴phi = 0，并且没有基本带通信号与轴phi = 0重合; 1 / 4n基本带通信号，不能由相位图的任何其他带通信号导出，既不是由于对称于轴phi = 0或轴φi= 90°，也不是与图的原点对称。 存储在数字存储器中; 剩余的，例如。 3 / 4n中，通过分别用+1或-1对存储的基本带通信号进行加权和/或分别在前向或后向读出存储器来获得基本带通信号。

公开(公告)号：US4249252A

公开(公告)日：1981-02-03

申请号：US936519

申请日：1978-08-24

申请人： Hagen Hofmeister

发明人： Hagen Hofmeister

IPC分类号： H04L7/027 ,  H04J3/06

CPC分类号： H04L7/027

摘要： A method and apparatus for recovering the timing frequency in a modulated data signal receiver containing a timing frequency generator, by demodulating a received signal with the aid of carriers which are shifted by 90.degree. in phase relative to one another to form two demodulation products, forming the sum of the squares of the two demodulation products, and determining changes in the value of that sum with respect to time to provide characteristic values which determine the adjustment criterion for the timing frequency generator.

摘要翻译： 一种用于在包含定时频率发生器的调制数据信号接收器中恢复定时频率的方法和装置，通过借助相对于彼此相位相差90°的载波解调接收信号以形成两个解调产物，形成 确定两个解调产物的平方和，并确定该和的值相对于时间的变化，以提供确定定时频率发生器的调整标准的特征值。