Systems and methods for detecting physical objects using passive radar receivers

A computer program product comprising a non-transitory computer readable medium having computer program logic for controlling a passive radar receiver for determining the location of a physical object, the computer program logic comprising:

• program code to allocate a target beam group and a line of sight (LoS) beam group, wherein the target beam group is associated with a target path and the LoS beam group is associated with an LoS path;
• program code to determine if a transmitter beam sweeping period (TBSP) is known and to execute a TBSP-based receiver beam sweeping if the TBSP is known;
• program code to determine if the TBSP can be measured and to execute the TBSP-based beam sweeping if the TBSP can be measured;
• program code to execute a random receiver beam sweeping if the TBSP is not known and cannot be measured;
• program code to determine a relative time of arrival of radio signals between the LoS path and the target path and to determine a propagation time on the LoS path and on the target path;
• and
• program code to determine the location of the physical object using the propagation times.