Time-of- Flight (ToF) estimation using the Discrete Logarithmic Frequency (DLF) method

When incorporated into the small, curved, and enclosed spaces of contemporary automotive lighting systems, conventional measurement tools like photodetectors, optical sensors, and laser-based systems frequently encounter difficulties. Physical space restrictions, light attenuation along curved surfaces, and the high energy consumption of conventional sensors—particularly in intelligent headlight modules and advanced driver-assistance systems (ADAS)—are some of these limitations. To address these issues, this work presents a novel method for Time-of-Flight (ToF) estimation based on the Discrete Logarithmic Frequency (DLF) approach. The suggested method improves the accuracy and dependability of ToF-based measurements by examining the time-frequency correlations of modulated light signals sent through optical channels in automotive systems. Applications like adaptive beam shaping, vehicle-to-vehicle (V2V) optical communication, and in-lens diagnostics benefit greatly from this. The system can efficiently record and assess signal performance in the vehicle's lighting infrastructure across intricate geometries and different optical path lengths by using the DLF method. This method paves the way for smarter, more efficient lighting technologies in next-generation cars by providing a low-energy, high-accuracy substitute for conventional approaches.