Digitized Round-Trip Wireless Phase Coherence Established Between Distributed Bi-Static Systems

A digitized round-trip method is proposed in this letter to achieve wireless and distance-independent phase coherence between distributed bi-static systems. Taking advantage of the robust anti-interference capabilities of digital circuits, the analog signals are digitized, enabling phase compensation at the master side through digital signal processing. The phase delay caused by transmission distance is compensated by a closed-loop negative feedback mechanism. This approach provides stable, robust, and distance-independent phase coherence at the slave side, with adjustable relative phase relationships between the distributed units.