A DFRC Based on Multichannel and Spatial Information Fusion for Multiradar Communication

Two problems have to be faced in the multiradar communication scenario. One problem is that the coupling of the sensing signal and the communication signal leads to the deterioration of dual-function performance. Another problem is that the confused localization of active and passive targets prevents the radar from identifying the actual communication resources. This letter proposes a novel sensing-centric dual-function radar-communication (DFRC) mechanism including multichannel (MC) scheme and spatial information fusion (SIF) scheme, named MCSIF-DFRC. For the coupling problem, according to the frequency characteristics caused by the propagation difference between the sensing signal and the communication signal, an MC scheme based on frequency analysis and separation is designed. For the confusion problem, since the direct communication signal and the reflected sensing signal from the same active target have consistency in spatial dimension, a SIF scheme of joint dual-function signals based on angle spectrum analysis and spatial information association is designed. The simulations indicate that the MCSIF-DFRC performs better on the ambiguity function and the interference probability by comparing it with some DFRC methods. The experiments prove the feasibility of the proposed mechanism to sense and communicate in the multiradar scenario.