A Receiving Coherence Method of Airborne Distributed Radar Based on Joint Search of Strong Scattering Points

During ground target detection by airborne distributed radar, the received echoes are often inundated with a multitude of clutter signals. This saturation of clutter can lead to the confusion or even the masking of the target signal, significantly undermining the system's reception coherence performance. In response to this challenge, a novel receiving coherence method based on the joint identification of multiple scattering points is introduced.The method compensates for the time and phase synchronization errors between radars, distinguishes strong scattering points from ground clutter through two-dimensional imaging, and then uses the scattering point positions are coherently synthesized to achieve coherent reception of airborne distributed radar. The effectiveness of this method has been substantiated through simulations and practical experiments, showcasing its utility in improving the radar system's performance in scenarios characterized by the presence of strong ground clutter.