Patent ID: 7345618
Filing Date: 2008-03-18
Classification: G01S,H01Q

Abstract:
1. A method of sensing moving entities, the method comprising: transmitting a stepped-frequency radar signal including a plurality of frequencies through a wall from a first side of the wall to a second side of the wall; receiving reflected portions of the radar signal with a first antenna arranged to receive signals reflected by the first side of the wall and a second antenna arranged to have a field of view opposite the first antenna; processing the reflected portions received from the first and second antennas to generate processed data including information associated with frequency shifts between the transmitted signal and the reflected portions of the radar signal received from the first antenna; and analyzing the processed data to determine if reflected portions are associated with moving entities located beyond the second side of the wall, the analyzing including differentiating reflected portions of the radar signal received from the first antenna from reflected portions of the radar signal received from the second antenna.