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Figure 2 | EURASIP Journal on Advances in Signal Processing

Figure 2

From: Removing non-stationary noise in spectrum sensing using matrix factorization

Figure 2

Noise distributions. Both the thermal noise power σ thermal 2 and AGC noise power σ AGC 2 contribute to the total noise power σ noise 2 as indicated by the dashed curve. Here the thermal noise is accentuated in Figure 1 a and the AGC noise in Figure 1 b. Additionally, both are modeled as white Gaussian processes whereas the sum of distributions provides a nearly perfect match with the measured noise from the mobile spectrum monitoring equipment. The latter is depicted by the bar plot as depicted in Figure 1 c. The objective is to remove the dark-shaded Gaussian distributed AGC noise contribution which is shown in Figure 1 b. This enhances the detection performance as illustrated in Figure 1 d.

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