Implementation of an mIRS-aided optical camera communication system: algorithm and experimental verification

Mirror array-based intelligent reflecting surfaces (mIRS) offer a promising solution to line-of-sight (LoS) blockage in optical camera communication (OCC). However, since the physical size of individual mIRS mirrors is smaller than the imaging field of view, reflected optical signals appear as discrete, fragmented stripe segments on the image sensor. These fragmented signals cannot be directly demodulated, constituting a primary challenge for mIRS-aided OCC. This Letter proposes a Geometric-Signal Reconstruction (GSR) scheme, which integrates an Overlapping Beam Alignment (OBA) algorithm for mIRS orientation configuration and a Correlation Sequence Stitching (CSS) algorithm for fragmented signal integration. We report the first, to the best of our knowledge, experimental implementation of an mIRS-aided OCC system. Experimental results verify that the proposed GSR scheme successfully restores blocked links with a bit error rate (BER) of 10^-4 and significantly enhances physical layer security through spatial selectivity.