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Optical Sources. By Asif Siddiq. LED. Electron from the conduction band recombines with a hole in the valance band of a semiconductor to produce a PHOTON Stimulated emission is not encouraged By not adding a cavity and mirrors Operates at lower current densities

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Noise Performance Evaluation Example: 16-QAM

Noise Performance Evaluation Example: 16-QAM What is the C/N ratio when the noise is at the threshold of causing errors?. Assuming all 16 symbols are equally likely, the average carrier power is proportional to:. For threshold noise performance, the noise power is proportional to:.

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