The intuitionistic spatial-frequency spectrum comparison of the four algorithms. (a) The 3-D spatial-frequency spectrum of MUSIC algorithm. (b) The 3-D spatial-frequency spectrum of MMS-OMP algorithm. (c) The 2-D normalized spatial spectrum of MUSIC, CSSM, W-CMSR and MMS-OMP algorithm. An intuitionistic spectrum comparison is given in these figures. The scenario is composed by two sources located at θ
1 = 10° and θ
2 = 30°, N = 10 sensors, T = 80 time snapshots, and SNR = −10 dB. The ratio of bandwidth to central frequency is 40%.