The tilted optical receiver is mounted on a rotatable platform and thus, various azimuth angles can be obtained by rotating the platform, which offers a feasible way to perform multiple measurements with different azimuth angles to achieve the angle gain. Optical Engineering is an SPIE journal that publishes peer-reviewed articles reporting on research, development, and applications of optics and photonics. We propose a compact visible light indoor positioning system fashioned with a single transmitter and a single tilted receiver. In order to solve this. Despite extensive research on received signal strength (RSS)-based visible light positioning (VLP), the receiver (RX) is assumed to stand vertically during the positioning process in most reported system designs.