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Free-space optical (FSO) communications
Abstract
USC researchers present a system to minimize turbulence interference in FSO communications. The method utilizes a frequency-offset Gaussian pilot tone transmitted along with the data signal, so that both undergo comparable turbulence and modal power coupling. Using a photodetector that optoelectronically...
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Telecommunications
Abstract
To enhance communication system capacity, USC researchers have successfully utilized multiplexing of multiple co-propagating beams, with each having a mutually orthogonal spatial modal structure. When multiplexing two polarizations, M frequencies, and N spatial modes, data capacity can be increased by a factor of 2 x M...
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5G communication
Transceivers
Last mile access
Abstract
USC’s solution increases the capacity of Free-Space Optical (FSO) communications by combining Multiple- input-multiple-output (MIMO) based spatial multiplexing with orbital angular momentum (OAM) multiplexing. MIMO signal processing with OAM beam orthogonality can phenomenally reduce...
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LoS communication systems
Cell phone communication systems
Emergency communication systems
Abstract
USC researchers have developed a high-speed mm-wave communication link achieving a data rate of 16 Gbit/s. The link utilizes Multiple-Input Multiple-Output (MIMO) processing of two Orbital Angular Momentum (OAM) modes on each of the transmitter and...
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