Iversen, K.K.IversenWolf, M.M.WolfMampel, D.D.MampelSchubert, H.H.SchubertSchmidt, C.C.Schmidt2022-03-092022-03-091997https://publica.fraunhofer.de/handle/publica/32951310.1109/ICASSP.1997.604836We present a novel infrared communication system for large cells and low user mobility. The proposed transmitter technique allows nearly perfect direction-of-arrival (DOA) estimation in time division multiple access (TDMA) environments only with three photodiodes. Using a photodiode array we show that known algorithms for DOA-estimation can be applied in spatial division multiple access (SDMA) systems.enaccess protocolsarray signal processingarraysdata communicationdirection-of-arrival estimationoptical communicationoptical information processingoptical transmittersphotodiodestime division multiple accessdoa estimationbeamforminginfrared photodiode arrayslarge cellslow user mobilitytransmitter techniquedirection of arrival estimationtime division multiple accestdmaspatial division multiple accesssdma systemswireless data communication621conference paper