Communication and positioning integration method and system based on digital phased array system

The invention provides a communication and positioning integrated method and system based on a digital phased array system, and the method comprises the steps: forming K directional narrow beams in a digital domain through a digital phased array antenna to cover a whole-airspace scanning range, and receiving a communication detection signal transmitted by a second node in an omnidirectional manner; performing frame header matching and energy detection on the received signal, and taking a directional narrow wave beam which is matched with a correlation peak of a communication detection signal and has the maximum energy as a target directional narrow wave beam; forming a sum beam and a difference beam in the direction of the target directional narrow beam through digital beam forming, determining a deviation value between the direction of the target directional narrow beam and the actual direction of the second node, and determining the actual direction of the second node; establishing a communication link with