Waveguide-Type Optical Circuit for Recognition of Optical QPSK Coded Labels in Photonic Router

A Pulse Signal Characteristic Recognition Algorithm Based on Multifractal Dimension

“…Therefore, the signal processing technology in recent years has become a hot issue in signal analysis areas and an integral part of signal recognition field. As the recognition results of modulation signals affect directly the restoration of the original signals, the automatic identification of communication signal plays a crucial role in the field of communication investigation [3], signal authentication [4], spectrum management [5], radio monitoring [6], electronic warfare [7], interference identification [8], and so forth. It is an important technology in radio spectrum management and intelligent signal processing.…”

Optical waveguide circuits for recognition of PSK and QAM coded labels

“…[12] The circuit consists of the asymmetric X-junction couplers, Y-junctions and 3-dB directional couplers. The number of bits per pulse can be further increased by introducing quadature amplitude modulation (QAM).…”

Recognition of Optical Layered Binary Phase Shift Keying Labels Using Coherent Acoustooptic Processor for Hierarchical Photonic Routing

“…[3][4][5][6] Various optical methods to recognize optical labels have been investigated, which include optical circuits for a single label or multiple labels. [7][8][9][10] We have reported circuits for optical labels encoded in time and spectral domains to effectively use the unique nature of collinear AO processing, that is, optical multiple wavelengths can be independently processed by frequency multiplexed surface acoustic waves (SAWs). [11][12][13] Label recognition with a single AO switch using this feature was discussed for WDM labels.…”