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Low-Complexity Symbol-Level Precoding for Dual-Functional Radar-Communication System

In this paper, dual-functional radar-communication system which can perform both radar and communication functionalities using the same hardware platform and spectrum resource is studied. Concretely, the mean-squared error between the designed and desired beampatterns is minimized subject to the communication quality-of-service requirements and the constant-modulus constraint. To solve this resulted problem efficiently, the alternating minimization framework is presented. Specifically, in the sub-problem of transmit signal design through symbol-level precoding, the low-complexity linearized alternating direction method of multipliers algorithm is presented. Finally, computer simulations are given to demonstrate the effectiveness of the proposed method.