The Information Theoretic Approach to Signal Anomaly Detection for Cognitive Radio
Figure 6
(a) Wireless broadband (WiBro) signal. The uplink subframe at ms has a longer duration than others and is therefore unusual in this context. (b) KLD and L1D analysis both reveal the anomalous segment of the WiBro signal. A second peak is obtained when the signal returns to normal—this is due to the twin-windowing nature of the anomaly detection algorithm. Once again, KLD analysis results in a larger peak and lower noise.
