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Modulation Classification Of Digital Communication Signals, Visalakshi S. Ramakonar
Modulation Classification Of Digital Communication Signals, Visalakshi S. Ramakonar
Theses: Doctorates and Masters
Modulation classification of digital communications signals plays an important role in both military and civilian sectors. It has the potential of replacing several receivers with one universal receiver. An automatic modulation classifier can be defined as a system that automatically identifies the modulation type of the received signal given that the signal exists and its parameters lie in a known range. This thesis addresses the need for a universal modulation classifier capable of classifying a comprehensive list of digital modulation schemes. Two classification approaches are presented: a decision-theoretic (DT) approach and a neural network (NN) approach. First classifiers are introduced …
Design And Analysis Of Optical Layouts For Free Space Optical Switching, Kung-Meng Lo
Design And Analysis Of Optical Layouts For Free Space Optical Switching, Kung-Meng Lo
Theses: Doctorates and Masters
The Intelligent Reconfigurable Optical Switch (IROS) is an N x N optical switch that uses two reflective Liquid Crystal (LC) Spatial Light Modulators (SLM} in a "Z" configuration to steer the incoming beams from the input ports to the designated output ports. Currently, the maximum steering capacity of practical SLM is limited to few degrees. For a dense optical switch, this makes the optical path between the input and output fiber ports relatively long. When a Gaussian beam is switched from an input fiber port to an output fiber port in a long free space interconnection topology, the beam's illumination …