Process and an apparatus for transmitting data across a two-wire line

Claim 2

A process for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa, wherein the data of the first station produce a cross-talk signal comprising first and second signal components, which cross talk signal is superimposed upon a received signal which comprises a cross-talk superposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising the steps of: transmitting the data with a data modulated carrier over the two-wire line; branching the modulated carrier into first and second orthogonal signal components whose phase angles differ by 90°; correlating a difference signal with the first and second orthogonal signal components, respectively, to produce a first regulating signal indicating the deviation of the first orthogonal signal component from the first signal component of the cross-talk signal and a second regulating signal indicating the deviation of the second orthogonal signal component from the second signal component of the cross-talk signal; producing first and second dummy signals from the first and second regulating signals and the data, respectively; multiplying the first orthogonal signal component and the first dummy signal, and the second orthogonal signal component and the second dummy signal to produce first and second multiplicative signals; summing the first and second multiplicative signals to produce a compensation signal; and summing the cross-talk superposed data modulated carrier and the compensation signal to produce the difference signal.

Claim 3

The process of claim 1, comprising the further step of: transmitting a further signal over the two-wire line in a frequency band which does not overlap the frequency band of the modulated carrier.

Claim 4

The process of claim 2, wherein the step of transmitting a further signal is defined as: transmitting a speech signal.

Claim 5

The process of claim 2, wherein the step of transmitting a further signal is defined as: transmitting a further base band data signal.

Claim 6

The process of claim 1, wherein the step of dividing the modulated carrier is defined as: dividing the modulated carrier into a first orthogonal signal component which is identical to the modulated carrier and a second orthogonal signal component phase 90° therefrom.

Claim 7

The process of claim 1, wherein the step of correlating the difference signal is defined as: multiplying the difference signal with the first orthogonal signal component to obtain a first multiplied signal; integrating the first multiplied signal to obtain the first regulating signal; multiplying the difference signal with the second orthogonal signal component to obtain a second multiplied signal; and integrating the second multiplied signal to obtain the second regulating signal.

Claim 8

A process for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa, wherein the data of the first station produce a cross-talk signal comprising first and second signal components, which cross-talk signal is superposed on a received signal which comprises a cross-talk superposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising the steps of: transmitting the data with a data modulated carrier over the two wire line; branching the modulated carrier into first and second orthogonal signal components whose phase angle differ by 90°; correlating a different signal with the first and second orthogonal signal components, respectively, to produce a first regulating signal indicating the deviation of the first orthogonal signal component from the first signal component of the cross-talk signal and a second regulating signal indicating the deviation of the second orthogonal signal component from the second signal component of the cross-talk signal; producing first and second dummy signals from the first and second regulating signals and the data, respectively; multiplying the first orthogonal signal component and the first dummy signal to produce a multiplicative compensation signal; shifting the phase of the modulated carrier with the second dummy signal prior to branching the modulated carrier into first and second orthogonal signal components; and summing the cross-talk superposed data modulated carrier and the multiplicative compensation signal to produce the difference signal.

Claim 9

A process for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa, wherein the data of the first station produce a cross-talk signal comprising first and second signal components, which cross-talk signal is superposed on a received signal which comprises a cross-talk superposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising the steps of: transmitting the data with a data modulated carrier over the two wire line; branching the modulated carrier into first and second orthogonal signal components whose phase angle differ by 90°; correlating a different signal with the first and second orthogonal signal components, respectively, to produce a first regulating signal indicating the deviation of the first orthogonal signal component from the first signal component of the cross-talk signal and a second regulating signal indicating the deviation of the second orthogonal signal component from the second signal component of the cross-talk signal; producing first and second dummy signals from the first and second regulating signals and the data, respectively; multiplying the first orthogonal signal component and the first dummy signal to produce a multiplicative compensation signal; shifting the phase of the modulated carrier with the second dummy signal prior to branching the modulated carrier into first and second orthogonal signal components; and summing the cross-talk superposed data modulated carrier and the multiplicative compensation signal to produce the difference signal.

Claim 10

The process of claim 7, comprising the further step of: transmitting a further signal over the two-wire line in a frequency band which does not overlap the frequency band of the modulated carrier.

Claim 11

The process of claim 7, wherein the step of transmitting a further signal is defined as: transmitting a speech signal.

Claim 12

The process of claim 7, wherein the step of transmitting a further signal is defined as: transmitting a further base band data signal.

Claim 13

The process of claim 7, wherein the step of deriving first and second orthogonal signal components is defined as: dividing the phase shifted data modulated carrier into two signal components; and shifting one of the two signal components 90° with respect to the other signal component.

Claim 14

The process of claim 7, wherein the step correlating the difference signal with the orthogonal signal components is defined as: multiplying the difference signal with the first orthogonal signal component to produce a first multiplication signal; integrating the first multiplication signal to produce the first regulating signal; multiplying the difference signal with the second orthogonal signal component to produce a second multiplication signal; and integrating the second multiplication signal to produce the second regulating signal.

Claim 15

Apparatus for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa; wherein the data of the first station produce a cross-talk signal comprising first and second signal components, the cross-talk signal being superimposed upon a received signal which comprises a cross-talk superposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising: a data input; a receiving input; transmitting means connected to said data input for transmitting the data with a data modulated carrier over the two-wire line; branching means connected to said transmitting means for branching the modulated carrier into first and second orthogonal signal components whose phase angles differ by 90°; correlating means for correlating the difference signal with a first and second orthogonal signal components, respectively, to produce a first regulating signal indicating the deviation of the first orthogonal signal components from the first signal component of the cross-talk signal and a second regulating signal indicating the deviation of the second orthogonal signal component from the second signal component of the cross-talk signal; simulation means connected to said data input and to said correlating means for producing first and second dummy signals from the first and second regulating signals and the data, respectively; multiplying means connected to said branching means and to said simulation means for multiplying the first orthogonal signal component and the first dummy signal and the second orthogonal signal component and the second dummy signal to produce first and second multiplicative signals, respectively; a first summer connected to said multiplying means for summing the first and second multiplicative signals to produce a compensation signal; and a second summer connected to said first summer and to said receiving input to receive the cross-talk superposed modulated data signal for summing the cross-talk superposed modulated data signal and the compensation signal to produce the difference signal.

Claim 16

Apparatus for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa; wherein the data of the first station produce a cross-talk signal comprising first and second signal components, the cross-talk signal being superimposed upon a received signal which comprises a cross-talk superposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising: a data input; a receiving input; transmitting means connected to said data input for transmitting the data with a data modulated carrier over the two-wire line; branching means connected to said transmitting means for branching the modulated carrier into first and second orthogonal signal components whose phase angles differ by 90°; correlating means for correlating the difference signal with a first and second orthogonal signal components, respectively, to produce a first regulating signal indicating the deviation of the first orthogonal signal components from the first signal component of the cross-talk signal and a second regulating signal indicating the deviation of the second orthogonal signal component from the second signal component of the cross-talk signal; simulation means connected to said data input and to said correlating means for producing first and second dummy signals from the first and second regulating signals and the data, respectively; multiplying means connected to said branching means and to said simulation means for multiplying the first orthogonal signal component and the first dummy signal and the second orthogonal signal component and the second dummy signal to produce first and second multiplicative signals, respectively; a first summer connected to said multiplying means for summing the first and second multiplicative signals to produce a compensation signal; and a second summer connected to said first summer and to said receiving input to receive the cross-talk superposed modulated data signal for summing the cross-talk superposed modulated data signal and the compensation signal to produce the difference signal.

Claim 17

The apparatus of claim 13, wherein said correlating means comprises: first and second multipliers connected to receive the difference signal and the first and second orthogonal signal components, respectively; and first and second integrators respectively connected to said first and second multipliers for producing the first and second regulating signals.

Claim 18

The apparatus of claim 13, wherein said dividing means comprises: a first line directly connecting said transmitting means to said multiplying means; and a second line, including a phase shifter therein, connecting said transmitting means to said multiplying means.

Claim 19

The apparatus of claim 13, for simultaneously transmitting another signal over the two-wire line, comprising: a high-pass filter connecting said transmitting means to the two-wire line; and a low-pass filter connecting the other signal to the two-wire line.

Claim 20

Apparatus for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa, wherein at the first station, the data produce a cross-talk signal comprising first and second signal components, which cross-talk signal is superimposed upon a received signal which comprises a cross-talk superimposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising: a data input; transmitting means connected to said data input for transmitting the data with a data modulated carrier over the two-wire line; phase shifting means connected to said transmitting means for producing first and second orthogonal signal components whose phase angles differ by 90°; correlating means including first and second outputs and connected to said phase shifting means for correlating a difference signal with the first and second orthogonal signal components, respectively, to produce first and second regulating signals respectively indicating magnitude and phase deviations of the two orthogonal signal components with respect to the first and second components of the cross-talk signal; simulation means connected to said data input and to said first and second outputs of said correlating means for producing first and second dummy signals, respectively, said simulation means connected to said phase shifting means for controlling the phases of the first and second orthogonal signal components simultaneously with the second dummy signal; multiplying means connected to said simulation means and to said phase shifting means for producing a compensation signal by multiplying the first orthogonal signal component with the first dummy signal; a receiving input; and summing means connected to said multiplying means and to said receiving input for producing the difference signal.

Claim 21

Apparatus for transmitting data over a two-wire line from a first station to a remote, second station and vice-versa, wherein at the first station, the data produce a cross-talk signal comprising first and second signal components, which cross-talk signal is superimposed upon a received signal which comprises a cross-talk superimposed data modulated carrier transmitted from the remote, second station and occurs in the received signal at the first station, comprising: a data input; transmitting means connected to said data input for transmitting the data with a data modulated carrier over the two-wire line; phase shifting means connected to said transmitting means for producing first and second orthogonal signal components whose phase angles differ by 90°; correlating means including first and second outputs and connected to said phase shifting means for correlating a difference signal with the first and second orthogonal signal components, respectively, to produce first and second regulating signals respectively indicating magnitude and phase deviations of the two orthogonal signal components with respect to the first and second components of the cross-talk signal; simulation means connected to said data input and to said first and second outputs of said correlating means for producing first and second dummy signals, respectively, said simulation means connected to said phase shifting means for controlling the phases of the first and second orthogonal signal components simultaneously with the second dummy signal; multiplying means connected to said simulation means and to said phase shifting means for producing a compensation signal by multiplying the first orthogonal signal component with the first dummy signal; a receiving input; and summing means connected to said multiplying means and to said receiving input for producing the difference signal.

Claim 22

The apparatus of claim 17, wherein said phase shifting means comprises: an adjustable phase shifter for shifting the phase of the data modulated carrier in response to said second dummy signal.

Claim 23

The apparatus of claim 18, wherein said phase shifting means comprises: a first line directly connecting said adjustable phase shifter to said multiplying means; and a second line, including a 90° phase shifter therein, connecting said adjustable phase shifter to said correlating means.

Claim 24

The apparatus of claim 17, wherein said correlating means comprises: first and second multipliers connected to receive the difference signal and the first and second orthogonal signal components, respectively; and first and second integrators respectively connected to said first and second multipliers for producing the first and second regulating signals.

Claim 25

The apparatus of claim 17, for simultaneously transmitting another signal over the two-wire line, comprising: a high-pass filter connecting said transmitting means to the two-wire line; and a low-pass filter connecting the other signal to the two-wire line.