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MIMO characterization of indoor wireless optical link using a diffuse-transmission configuration

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2 Author(s)
Alqudah, Y.A. ; Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA ; Kavehrad, Mohsen

Performance of a diffuse optical link may potentially be degraded by temporal dispersions resulting from surface reflections. In order to devise techniques to alleviate the adverse effect of dispersion, an accurate channel model is needed. Obtaining the impulse response (IR) for a given receiver location requires consideration not only of the direct path, but also of reflections up to nth order. The IR is only valid for a specific location and specific receiver parameters. If a receiver moves, the IR has to be recalculated. We propose a new approach for characterizing diffuse links that results in a tremendous saving in calculation and also gives more insight into the channel characteristics. The new approach is based on consolidating the dependence of receiver parameters, transmitter parameters, and the indoor environment into independent components. Thus, changing one of the parameters of the link requires recalculation of one of these components. The new model is utilized to obtain an accurate profile of delay spread and received power throughout a room.

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Communications, IEEE Transactions on  (Volume:51 ,  Issue: 9 )