Indoor navigation and positioning are an essential requirement for numerous industrial applications. Lately, the development of driverless vehicles necessitates the automated parking of vehicles in parking garages. This requires accurate and precise indoor positioning of the vehicles. This work discusses the theoretical basis behind an Optical Wireless Positioning setup in a representative parking garage. The selected hardware and design considerations are elaborated and the performance of the setup is reported. The demonstrated performance shows that 95% of the calculated positions have an error smaller than 12.7 cm compared to the ground truth data.