Architectures for cooperative radar-communications: Average vs. generalized likelihood ratio tests

A radar receiver cooperating with a communication system to share spectrum is challenged by composite hypothesis testing that is compounded by the persistent presence of in-band communication signals. Two established approaches to composite hypothesis testing are explored within the cooperative radar-communication context: (i) Bayesian integration (leading to the average likelihood ratio test (ALRT)), and (ii) the generalized likelihood ratio test (GLRT). The receiver operating characteristic (ROC) performance and practicality of the receive architectures implied by the ALRT and GLRT are examined.