A Clustering Technique for Ultrawideband Channel Using Modified Affinity Propagation

In this letter, we present an ultrawideband channel clustering algorithm using modified affinity propagation (AP). Unlike typical AP algorithms, which define similarity as a negative-squared Euclidean distance between data points, we define it to reflect the amplitude discontinuity observed in Saleh–Valenzuela models. The proposed algorithm was tested on simulated channel impulse response and propagation data measured in an indoor environment, and reasonable clustering results were observed.