Fig. 6
From: Enhanced range doppler mapping algorithm for passive GNSS based radar aerial target detection

RDM map by Beidou B2 signal after noise reduction. (a) RDM graph after noise reduction, (b) original 3D RDM graph.
From: Enhanced range doppler mapping algorithm for passive GNSS based radar aerial target detection

RDM map by Beidou B2 signal after noise reduction. (a) RDM graph after noise reduction, (b) original 3D RDM graph.