Off-grid radar detection strategy for the Normalized Matched Filter: achieving the GLRT performance

A general problem in radar is to detect whether the received signal contains a specific signal of interest or not. We focus on one of the most widespread detectors: the Normalized Matched Filter. To be more realistic, we consider the case where the target can be off-grid. Currently, different methods exist to perform the off-grid Normalized Matched Filter test, but their detection performances are degraded if the noise is not white. In this paper, a new method based on reparametrization is proposed. While having a computational cost similar to state-of-the-art techniques, its detection performances are always better.