Adaptive expanded information capacity for communications systems

A method for simultaneously transmitting a data signal with a standard television signal, said method comprising:

• generating an abatement signal based on at least one control signal from a monitor receiver;
• combining a signal related to the abatement signal to an internal data signal;
• and
• coupling a signal related to the combined signal to the television signal, thereby simultaneously transmitting the data signal with the standard television signal.

A method for controlling the phase of a data signal and a standard television signal, said data and television signals being transmitted simultaneously in a television spectrum, the method comprising:

• producing a phase correction signal to compensate for distortion in a television transmitter system;
• upward shifting the phase correction signal using a reference signal;
• down converting the standard television signal to an intermediate frequency;
• comparing the upward shifted phase correction signal with the down converted television signal;
• adjusting a local oscillator used to down convert the standard television signal based on the comparison;
• and
• using the local oscillator to up-convert an intermediate frequency signal to generate the data signal.

A method for transmitting a television spectrum comprising a standard television signal and a data signal, comprising:

• receiving data;
• passing a signal containing the data through a Nyquist complement filter means;
• generating an abatement signal based on at least one channel metric from a monitor receiver means;
• applying the abatement signal to the television to correct for effects of the data on the television signal;
• applying the data signal to the television signal;
• and
• simultaneously transmitting the data signal and the abated television signal, the data signal substantially in quadrature to the television signal as sensed at receivers for receiving the television signal.

A method for providing at least one feedback control signal in a transmitter system transmitting a spectrum comprising a standard television signal and a data signal, the method comprising:

• receiving the television signal;
• using a monitor receiver means, generating at least one feedback control signal to a transmitter system transmitting the television spectrum, generating an abatement signal based on the at least one feedback control signal to correct for effects of the data signal on the television signal;
• and
• applying the abatement signal to the television signal.

A method for transmitting a spectrum comprising a standard television signal and a data signal, the method comprising:

• coupling a correction signal to the standard television signal;
• generating at least one first feedback signal for adjusting an internal data signal related to the data signal and for adjusting an internal correction signal related to the correction signal;
• adjusting the internal data signal based on the at least one feedback signal;
• and
• adjusting the internal correction signal based on the at least one feedback, wherein the correction signal is substantially in phase with the standard television signal and the data signal is substantially in quadrature relative to the standard television signal.

A method for transmitting a television spectrum comprising standard television signal, a correction signal, and a data signal, the method comprising:

• generating a phase control signal and an amplitude control signal based on the power level of the standard television signal;
• generating an abatement signal;
• adjusting the amplitude and phase of the abatement signal;
• generating the correction signal based on the adjusted abatement signal;
• adjusting the phase component of an internal data signal related to the data signal;
• applying the correction signal and the data signal to the television signal, wherein the correction signal is substantially in phase with the standard television signal, and the data signal is substantially in quadrature relation with the standard television signal as sensed by receivers for receiving the television signal.

A method for generating an insertion phase control signal used in a transmitter system for transmitting a standard television spectrum comprising a standard television signal and a data signal, the method comprising:

• generating a sequence of information;
• modulating the sequence of information through a first plurality of signal processing steps, said signal processing steps duplicating a second plurality of signal processing steps used to modulate a sequence of data used to generate the data signal;
• providing a complex baseband signal recovered from the standard television spectrum;
• correlating the modulated sequence of information with the complex baseband signal;
• generating the insertion phase control signal based on the correlation;
• and
• using the insertion phase control signal to control a phase relationship between the data signal and the standard television signal.

A method for generating an abatement equalization signal, comprising:

• receiving a standard television spectrum comprising a standard television signal and a data signal;
• recovering a video estimate from the standard television spectrum;
• comparing the video estimate with a video reference signal and producing a residual error signal;
• and
• utilizing an adaptive filter to minimize the residual error and obtain the abatement equalization signal.

A method for generating an abatement optimization signal, comprising:

• receiving a standard television spectrum comprising a standard television signal and data signal using a plurality of model TV receivers;
• producing a plurality of model video estimates from the plurality of model TV receivers;
• comparing each of the plurality of model video estimates with a video reference signal and generating a plurality of residual error signals;
• producing a plurality of weighted residual error signals by statistically weighting each of the plurality of residual error signals according to a statistical prevalence of the corresponding model TV receiver within a broadcast region;
• and
• utilizing an adaptive filter to minimize the plurality of weighted residual errors and generate the abatement optimization signal.

A method of receiving a standard television spectrum comprising a standard video signal and a data signal, comprising:

• receiving the standard television spectrum;
• recovering the carrier of the television spectrum;
• producing a video signal estimate and a data signal estimate;
• recovering a sync magnitude based on the video signal estimate;
• amplitude adjusting the video and data signal estimates based on the recovered sync magnitude;
• performing an adaptive equalization and a video cancellation;
• and
• providing a processed data signal.

A system for simultaneously transmitting a data signal with a standard television signal, said method comprising:

• an abatement generator for generating an abatement signal;
• a compensator for generating a correction signal to compensate for a non-linear distortion;
• means for adjusting the abatement signal with the correction signal;
• means for adjusting an internal data signal related to the data signal with the correction signal;
• a combiner for combining the adjusted abatement signal and the adjusted internal data signal;
• an up-converter for translating a signal related to the combined abatement signal and the internal signal to produce the data signal;
• and
• a power amplifier for transmitting a composite television spectrum comprising the data signal and the standard television signal.

A system for simultaneously transmitting a data signal with a standard television signal, said method comprising:

• an abatement generator for generating an abatement signal based on at least one control signal from a monitor receiver;
• a combiner for combining a signal related to the abatement signal and an internal data signal, said internal data signal being related to the data signal and being in substantial quadrature relationship to the signal related to the abatement signal;
• a means for modulating and converting the combined signal to an analog signal;
• an up-converter for producing the data signal from the output of the modulator;
• and
• a coupler for inserting the data signal to a television spectrum carrying the standard television signal.

A system for controlling the phase of a data signal relative to a standard television signal, said data and television signals being transmitted simultaneously in a television spectrum, the system comprising:

• a compensator for generating a nonlinear phase correction signal for a non-linear distortion in a television transmitter system;
• means for modulating and shifting upward in frequency the non-linear phase correction signal using a reference signal;
• a down converter for shifting down in frequency the standard television signal to an intermediate frequency using a local oscillator;
• a comparator for comparing the upward shifted non-linear phase correction signal with the down converted television signal and providing a control signal to adjust the local oscillator;
• and
• an up-converter for shifting upward in frequency an intermediate frequency signal related to the data signal, wherein the up-converter uses a reference signal from the local oscillator.

A system for transmitting a television spectrum comprising a standard television signal and a data signal comprising:

• a receiver for receiving data information;
• an interpolator for interpolating a signal corresponding to the received data information;
• a mixer for frequency shifting the interpolated signal;
• a Nyquist complement filter (“NCF”) and a vestigial sideband filter (VSBF”) for modulating the frequency shifted and interpolated signal;
• an abatement generator for generating an abatement signal;
• a combiner for combining a first signal related to the abatement signal and second signal related to the output of the NCF and VSBF;
• an up-converter for frequency shifting the combined first and second signals,
• a coupler for inserting the frequency shifted and combined first and second signals into the television spectrum carrying the standard television signal;
• wherein the first signal is substantially in phase with the standard television signal and the second signal is substantially in quadrature relationship with the standard television signal.

A monitor receiver for generating an insertion phase control signal used in a transmitter system for transmitting a standard television spectrum comprising a standard television signal and a data signal, comprising:

• a generator of a first sequence of data;
• a modulator for modulating the sequence of data to duplicate a plurality of signal processing steps used to modulate a second sequence of data transmitted as the data signal;
• a receiver for recovering a complex baseband signal from the standard television spectrum;
• a correlator for correlating the modulated first sequence of data with the complex baseband signal;
• a generator for generating the insertion phase control signal based on the output of the correlator;
• and
• an output means for providing the insertion phase control signal to the transmitter system to control the phase relationship between the data signal and the standard television signal.

A monitor receiver for generating an abatement optimization signal used in a transmitter system for transmitting a standard television spectrum comprising a standard television signal and a data signal, the monitor receiver comprising:

• a plurality of model TV receivers for receiving the standard television spectrum, each model TV receiver producing a model video estimate;
• a comparator for comparing each model video estimate with a video reference signal and generating a corresponding residual error signal;
• a statistically weighting component for weighting each of the plurality of residual error signals according to a statistical prevalence of the corresponding model TV receiver within a broadcast region;
• and
• an adaptive filter for minimizing the plurality of weighted residual errors and obtaining the abatement optimization signal.

A receiver for receiving a standard television spectrum comprising a standard television signal and a data signal comprising:

• a tuner for receiving the standard television spectrum;
• a mixer for recovering the carrier of the television spectrum;
• a Nyquist filter producing a video estimate signal and a data estimate signal based on the recovered carrier and the received standard television spectrum;
• a sync recovery processor for recovering a sync magnitude based on the video estimate signal;
• a gain controller for adjusting the video and data estimate signals based on the recovered sync magnitude;
• at least one adaptive filter for performing an adaptive equalization and video cancellation;
• and
• an output means for providing a processed data signal based on the output of the at least one adaptive filter.