The Information Theoretic Approach to Signal Anomaly Detection for Cognitive Radio

Figure 3

At any given time, only a maximum of four histogram bins need to be updated (two per window). Bins incremented (fresh samples) are denoted by 𝑗 and 𝑚 while bins decremented (old samples at the end of the window) are denoted by 𝑘 and 𝑜.