Processing of interference on a radiofrequency signal by power inversion
AssigneeThales
InventorsEstelle Kirby, Alain Renard
Life of this patent
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Abstract
The invention relates to a radiofrequency receiver, notably for satellite positioning applications, needing to operate in an environment where interference is dense, notably when it involves pulses transmitted by DME beacons. Below the useful signal suppression threshold, amplitude or power are inverted to improve the dynamic interference response time. Advantageously, the useful signal suppression threshold and the set point power or amplitude are determined by analyzing the amplitude or power probability density function in its part enriched with low amplitude/power samples.
Claims22
A device for receiving a radiofrequency navigation signal comprising a module for estimating a characteristic quantity of said signal chosen from the amplitude, power group, a module for filtering said quantity and a module for inverting said quantity, wherein at least one parameter of at least one of the modules of the estimation, filtering group is adjustable to perform a more or less optimum processing of interferences disturbing the radiofrequency signal.
A method of processing a radiofrequency navigation signal comprising a step for estimating a characteristic quantity of said signal chosen from the amplitude, power group, a step for filtering said quantity and a step for inverting said quantity, wherein at least one parameter of at least one of the steps of the estimation, filtering group is adjustable to perform a more or less optimum processing of interferences disturbing the radiofrequency signal.
Dependencies are inferred from the claim text.