Joint Optimization of Coherent Gain and Resource Allocation for Distributed Coherent Radar

Aiming at the problem that the coherent accumulation performance of distributed coherent radar systems in complex electromagnetic environments is degraded due to delay error, phase mismatch and target RCS fluctuation, which in turn reduces the tracking capability of key airspace targets, a joint optimization method based on coherent gain and time resource allocation is proposed. Firstly, a multi-radar coherent accumulation performance model is established to quantitatively analyze the coupling mechanism of delay compensation error, phase synchronization accuracy (deviation angle ±5°-±30°) and target RCS fluctuation characteristics on the system coherent gain. Then, a constrained optimization model with the goal of maximizing the number of tracked targets is constructed. The simulation results show that under the same time resource constraints, the proposed method increases the coherent gain to 16.7dB compared with the fixed scheduling strategy, the number of simultaneously tracked targets in the key airspace is increased to 26, and the resource utilization rate reaches 82.3%, which verifies the feasibility of this method in improving the collaborative detection efficiency of distributed radar systems in complex environments.