1. An ultra-wide band (UWB) radio frequency (RF) interferometry unit comprising: an UWB RF pulse generator configured to generate UWB RF pulses having specified characteristics, at least one UWB RF transmitting antenna configured to receive the generated UWB RF pulses and transmit corresponding UWB RF signals at an environment including at least one human, at least one UWB RF reception antenna configured to receive echo signals from the environment, an UWB RF interferometer configured to deliver the received echo signals for processing, and an environmental clutter cancelation module configured to filter out static non-human related echo signals; wherein at least one of UWB RF transmitting and reception antennas comprises a Synthetic Aperture Antenna Array (SAAA) comprising a plurality of linear baseline antenna arrays (“baselines”).