The present application relates to a communication-centered RIS-assisted joint
beamforming method for ISAC network without cells, and belongs to the technical field of sensing and communication. The present application solves the problem that there is no related work to establish a
system model for RIS-assisted ISAC network without cells, and proposes a communication-centered design under the constraint of sensing performance. The present application includes establishing a
system model in the RIS-assisted ISAC network without cells; obtaining the
signal expression of the communication
system and the
radar system; establishing an
optimization problem for maximizing the communication performance in the RIS-assisted ISAC network without cells; converting the problem into a
base station beamforming problem and an RIS phase shift design problem; using the alternating optimization method for optimization, and using the alternating direction
multiplier method for sub-problem optimization; judging whether to converge, and if not, repeating step five, and if converging, completing the optimization. The present application first establishes a model for RIS-assisted ISAC network without cells, and proposes a communication-centered design, which meets the scene demand of high communication requirement in the integrated sensing and
communication system design.