Angle Diversity Receiver for Indoor Optical Wireless Communication Systems

Abstract

Many factors, such as direct spotlights and multipath propagation, contribute to the deterioration of the optical wireless communication (OWC) system's performance in the interior environment. In this study, we look at angle diversity receiver (ADR) that can assist to mitigate these issues by rejecting direct pathways from the spotlights and allowing only reflected rays to reach the receiver. ADR also shortens the distance between the sender and the recipient, resulting in less path loss and delay spread. ADR consists of five photodetectors and each photodetector is directed in a precise direction to improve the system's performance by providing a specified field of view (FOV). Elevation angles are optimized to enhance the signal-to-noise ratio (SNR) by changing the angle in steps. Select the Best (SB) scheme is used to choose the detector with the greatest SNR. The computations are done with the help of the MATLAB program. The ADR's results are compared to the conventional diffuse system's (CDS) results, where the bit error rate (BER), and the delay spread are lowered greatly, and the 3-dB bandwidth of the channel is extended, according to the findings.