Technique for communicating digitally modulated signals over an amplitude-modulation frequency band

Apparatus for providing a plurality of digitally modulated signals containing information in a frequency band including an AM carrier frequency, the apparatus comprising:

• a generator for generating the digitally modulated signals based on at least one power profile, the at least one power profile defining relative power levels of the digitally modulated signals and being configured to reduce adjacent channel interference between the digitally modulated signals and an additional signal set associated with another carrier frequency, the digitally modulated signals populating the frequency band, the at least one power profile being asymmetric about the AM carrier frequency, the at least one power profile being identified by control information utilizable in a receiver to dynamically adapt the receiver to the at least one power profile in detecting at least a portion of the digitally modulated signals;
• and
• an interface for transmitting the digitally modulated signals.

Apparatus for communicating selected information and control information comprising:

• a generator for generating a plurality of signals representing the selected information and the control information;
• and
• a controller responsive to the control information for selecting at least one power profile, the at least one power profile defining relative power levels of the signals and being configured to reduce adjacent channel interference between the plurality of signals and an additional signal set associated with an adjacent channel carrier frequency, the plurality of signals being generated based on the selected power profile, the at least one power profile being identified by the control information, the control information being utilizable in a receiver to dynamically adapt the receiver to the at least one power profile in detecting at least a portion of the plurality of signals.

Apparatus for receiving a plurality of signals comprising:

• an interface for receiving the signals, at least one of the signals containing control information concerning at least one power profile, the at least one power profile defining relative power levels of the signals and being configured to reduce adjacent channel interference between the plurality of signals and an additional signal set associated with an adjacent channel carrier frequency;
• and
• a receiver for recovering the control information in response to the at least one of the plurality of signals, the at least one power profile being identified by the control information, the control information being utilizable in the receiver to dynamically adapt the receiver to the at least one power profile in detecting at least a portion of the plurality of signals.

A method for providing a plurality of digitally modulated signals containing information in a frequency band including an AM carrier frequency, the method comprising:

• generating the digitally modulated signals based on at least one power profile, the at least one power profile defining relative power levels of the digitally modulated signals and being configured to reduce adjacent channel interference between the digitally modulated signals and an additional signal set associated with another carrier frequency;
• and
• arranging the digitally modulated signals to populate the frequency band, power levels of a first subset of the digitally modulated signals populating a first subband in the frequency band being non-zero and relatively low, with respect to power levels of a second subset of the digitally modulated signals populating a second subband in the frequency band, the at least one power profile being identified by control information utilizable in a receiver to dynamically adapt the receiver to the at least one power profile in detecting at least a portion of the digitally modulated signals.

A method for providing a plurality of digitally modulated signals containing information in a frequency band including an AM carrier frequency, the method comprising:

• generating the digitally modulated signals based on at least one power profile, the at least one power profile defining relative power levels of the digitally modulated signals and being configured to reduce adjacent channel interference between the digitally modulated signals and an additional signal set associated with another carrier frequency;
• and
• arranging the digitally modulated signals to populate the frequency band, the at least one power profile being asymmetric about the AM carrier frequency, the at least one power profile being identified by control information utilizable in a receiver to dynamically adapt the receiver to the at least one power profile in detecting it least a portion of the digitally modulated signals.

A method for communicating selected information and control information comprising:

• generating a plurality of signals representing the selected information and the control information;
• and
• in response to the control information, selecting at least one power profile, the at least one power profile defining relative power levels of the signals and being configured to reduce adjacent channel interference between the plurality of signals and an additional signal set associated with an adjacent channel carrier frequency, the plurality of signals being generated based on the selected power profile, the at least one pow profile being identified by the control information, the control information being utilizable in a receiver to dynamically adapt the receiver to the at least one power profile in detecting at least a portion of the plurality of signals.

A method for receiving a plurality of signals comprising:

• receiving the signals, at least one of the signals containing control information concerning at least one power profile, the at least one power profile defining relative power levels of the signals and being configured to reduce adjacent channel interference between the plurality of signals and an additional signal set associated with an adjacent channel carrier frequency;
• and
• recovering the control information in response to the at least one of the plurality of signals, the at least one power profile being identified by the control information, the control information being utilizable to dynamically adapt a receiver to the at least one power profile in detecting at least a portion of the plurality of signals.