Systems and methods to compensate a frequency

A method of compensating a frequency associated with a first communications node or a second communications node in a communications system, comprising:

• generating a first signal representing a predicted motion of said first communications node;
• generating a second signal representing a predicted motion of said second communications node;
• computing at least one of a compensated transmission frequency or a compensated receiving frequency based on a predicted relative motion between said first and second communications nodes, wherein said predicted relative motion is based on said first and second signals;
• generating a third signal representing an actual motion of said first communications node;
• generating a feedback signal representing a difference between said first signal and said third signal;
• and
• applying said feedback signal to improve accuracy of said first signal.

A communications system that compensates a frequency associated with a first communications node or a second communications node, comprising:

• a motion predictor configured to provide a first signal representing a predicted motion of said communications node;
• a data block configured to provide a second signal representing an actual motion of said first communications node;
• an element configured to adjust said first signal based on a difference between said first and second signals;
• and
• a processor configured to compute at least one of a compensated transmission frequency or a compensated receiving frequency based on a predicted relative motion between said first and second communications nodes;
• wherein said predicted relative motion is based on said first signal and a third signal that is representative of a predicted motion of said second communications node.

A communications node, comprising:

• a motion predictor configured to obtain a first signal representing a predicted motion of said node;
• a data block configured to obtain a second signal representing an actual motion of said node;
• an element configured to adjust said first signal based on a difference between said first and second signals;
• and
• a processor configured to compute at least one of a compensated transmission frequency or a compensated receiving frequency based on a predicted relative motion between said node and a second communications node;
• wherein said predicted relative motion is based on said first signal and a third signal that is representative of a predicted motion of said second communications node.

A communications system, comprising:

• means for predicting a motion of a first communications node to generate a first signal representing the predicted motion of said first communications node;
• means for predicting a motion of a second communications node to generate a second signal representing the predicted motion of said second communications node;
• a processor to compute at least one of a compensated transmission frequency and a compensated receiving frequency based on said first signal and said second signal;
• means for determining an actual motion of said first communications node to generate a third signal representing the actual motion of said first communications node;
• means for determining an actual motion of said second communications node to generate a fourth signal representing the actual motion of said second communications node;
• means for generating a first feedback signal representing a difference between said first signal and said third signal to improve accuracy of said first signal;
• and
• means for generating a second feedback signal representing a difference between said second signal and said fourth signal to improve accuracy of said second signal.

A communications system, comprising:

• a first communications node, including
• a first motion predictor to generate a first signal representative of a predicted motion of said first communications node,
• a first data block to generate a second signal representative of an actual motion of said first communications node, and
• a first element that generates a first feedback signal representative of a difference between said first signal and said second signal to improve accuracy of said first signal;
• a second communications node, including
• a second motion predictor to generate a third signal representative of a predicted motion of said second communications node,
• a second data block to generate a fourth signal representative of an actual motion of said second communications node, and
• a second element that generates a second feedback signal representative of a difference between said third signal and said fourth signal to improve accuracy of said third signal;
• and
• a processor to compute at least one of a compensated transmission frequency or a compensated receiving frequency based on said first signal and said third signal.