Abstract
In this paper, we propose an orientation-induced link-blocked receiver (OLBR) to simultaneously reduce the correlation of the multiple-input multiple-output (MIMO) channels and avoid disruptive transmission in visible light communication (VLC) system. The idea of this paper is to combine the adjustable normal vector ideology of an angle diversity receiver with the channel correlation reduction of a link-blocked receiver. The proposed OLBR is designed to intentionally block specific links while enhancing other links between light-emitting diodes (LEDs) and photodiodes (PDs). Besides, the proposed receiver can perform well in many locations in the room whereas conventional receivers fail to receive signals from at least one LED due to unwanted line-of-sight (LOS) link blocking. Moreover, an algorithm is proposed to iteratively solve the optimization problem, taking the normal vectors of the PDs into consideration. The simulation results show that the proposed OLBR can achieve a performance gain in comparison with previous receiver design schemes for different scenarios, especially in the locations that are far from LEDs.
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