Figure 16From: Removing non-stationary noise in spectrum sensing using matrix factorization Spectrum occupancy: a comparison. The occupancy of the 2.4 GHz ISM band for the area of interest (see Figure 5). The blue curve represents the occupancy according to energy detection using the ITU recommended threshold whereas the green curve denotes the occupancy as computed by the AGC removal algorithm (AGC removal step 2 in Table 2).Back to article page