Patent 7646329 was granted and assigned to Qinetiq Limited on January, 2010 by the United States Patent and Trademark Office.
A method of detecting a target in a scene comprises the steps of generating a comparison of the value of data elements in first and second data sets, the data elements corresponding to returns from the same part of the scene and setting a detection threshold value for the comparison so as to detect targets entering said that part of scene The method provides improved target detection in the presence of clutter.