Method of processing a pulse response with an adaptive threshold and corresponding receiver
AssigneeCommissariat a l'Energie Atomique
InventorsDidier Lattard, Jean-René Lequepeys, Didier Varreau, Mathieu Bouvier des Noes
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Abstract
A method of processing a pulse response with an adaptive threshold and corresponding receiver. According to the method, an adaptive threshold is calculated that is a function of a maximum reached by the pulse response, noise, and a coefficient adjustable between 0 and 1. The processing only comes into operation for signals that exceed this threshold. Such a method may find application notably to digital radio-communications with spread spectrum.
Claims5
A method of processing a pulse response made up of plural successive pulses overwritten with noise, comprising:
- in a preliminary process, determining a value of a maximum amplitude of the pulses within a defined period of time and a value of a mean noise within the defined period of time;
- calculating an adaptive threshold equal to a function of the maximum amplitude and of the mean noise;
- comparing the pulses received with the threshold and only those pulses that exceed the threshold are taken into account to carry out processing of the signal,
- wherein the adaptive threshold is taken to be equal to quantity B+α(M−B) where M is the value of the maximum amplitude, B is the value of the mean noise, and α is a coefficient adjustable between 0 and 1.
Dependencies are inferred from the claim text.