Abstract. This paper introduces a framework for event correlation in communication systems. We will show how the concept of a class in objectoriented methodology can be used to provide scalability to the framework. Events and system topology information are combined to generate the causal information needed for correlation. Geometric representation of codewords is used to overcome the noise factor. Temporal reasoning is explored to reduce noise and increase the number of event patterns that can be detected. The framework has been applied to a wireless communication system.
Methods of geometric optics are used to characterize a multimode optical fiber. The discrete propagation modes are derived by applying the phase resonance constraint to equations of constant phase surfaces. This constraint provides a very clear geometrical interpretation of discrete propagation modes, and provides a link between the well known Wentzel, Kramers, Brillouin (WKB) method and geometric optics.
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