公开(公告)号：US4020288A

公开(公告)日：1977-04-26

申请号：US623349

申请日：1975-10-17

申请人： Maurice Georges Bellanger ,  Jacques Lucien Daguet

发明人： Maurice Georges Bellanger ,  Jacques Lucien Daguet

IPC分类号： H04B3/10 ,  H03H17/00 ,  H03H17/02 ,  H04B14/00 ,  H04J1/05 ,  H04J1/08 ,  H04J1/14 ,  H04J11/00 ,  H04L5/00 ,  H04L5/06 ,  H04L25/02

CPC分类号： H04J1/08 ,  H04J1/14 ,  H04L5/06

摘要： Parallel data transmission system in which the data signals are converted to multilevel digital signals and transmitted through the channels of a frequency division multiplex system. To compensate for the delays between the data signals received in the various channels of the multiplex, a pilot signal is transmitted in each channel in the form of a signal which only has a real component. At the receiver side a filter circuit is used which comprises a first fixed coefficient part at whose input the data signal is multiplied by a component of the received pilot signal and a second part having two variable coefficients which are derived from the two components of the received pilot signal.

摘要翻译： 并行数据传输系统，其中数据信号被转换为多电平数字信号并通过频分复用系统的信道传输。 为了补偿在多路复用的各种信道中接收到的数据信号之间的延迟，导频信号以仅具有实际分量的信号的形式在每个信道中发送。 在接收机侧，使用滤波电路，其包括第一固定系数部分，其输入端将数据信号乘以接收到的导频信号的分量，以及具有两个可变系数的第二部分，该两个可变系数是从接收到的两个分量导出的 导频信号。

公开(公告)号：US3971922A

公开(公告)日：1976-07-27

申请号：US528506

申请日：1974-11-29

申请人： Maurice Georges Bellanger ,  Jacques Lucien Daguet

发明人： Maurice Georges Bellanger ,  Jacques Lucien Daguet

IPC分类号： H03H17/04 ,  H04J1/05 ,  G06F7/38

CPC分类号： H03H17/0273 ,  H03H17/04 ,  H04J1/05 ,  H03H2218/04

摘要： An arrangement for digitally processing a given number of analog channel signals, more particularly a digital multiplexer and demultiplexer provided with a number of signal paths each comprising a recursive digital filter and delay circuits arranged in cascade therewith, said filter circuits having an amplitude-frequency characteristic of a lowpass filter having a cut-off frequency which is equal to half the bandwidth of a channel signal and a phase-frequency characteristic which is such that the difference between such a phase-frequency characteristic and the phase-frequency characteristic of a reference digital filter has a sawtooth-shaped variation, the slope of the sawtooth being opposite to the slope of the cooperating delay circuit. The arrangement furthermore comprises in cascade a discrete Fourier transformer connected to the signal paths.

摘要翻译： 一种用于数字处理给定数量的模拟信道信号的装置，更具体地说，一种数字多路复用器和解复用器，其提供有多个信号路径，每个信号路径包括递归数字滤波器和与其级联的延迟电路，所述滤波器电路具有振幅频率特性 具有等于​​通道信号的带宽的一半的截止频率的低通滤波器和相位频率特性，使得这种相位频率特性与参考数字的相位频率特性之间的差异 滤波器具有锯齿形变化，锯齿波的斜率与协同延迟电路的斜率相反。 该装置还包括级联连接到信号路径的离散付里叶变换器。