首页|Underwater wireless optical NOMA communication experiment system exploiting GaN-based micro-LED array grouping
Underwater wireless optical NOMA communication experiment system exploiting GaN-based micro-LED array grouping
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维普
This paper has proposed an experimental system for non-orthogonal multiple access[NOMA]wireless optical communi-cation in challenging underwater turbulent environments,employing the gallium nitride[GaN]-based micro-LED array.This design of the GaN-based micro-LED array enables the independent transmission of signals from distinct data streams within the NOMA framework,facilitating direct optical power-domain superposition of NOMA signals.The experimental setup involves emulating oceanic turbulence channels,characterized by varying the level of scintillation intensity,to thor-oughly investigate the bit error rate[BER]performance.The outcomes unequivocally demonstrate the superiority of our proposed NOMA scheme,as compared to conventional circuit-driven optical NOMA systems utilizing fixed LED array group-ing,particularly in the presence of turbulent underwater channels.The proposed NOMA scheme exhibits consistently supe-rior BER performance and maintains excellent linearity at the lower frequencies while effectively mitigating signal distortion at the higher frequencies.
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