ERROR CONTROL CODING TECHNIQUES FOR LI-FI SYSTEMS

Abstract

This paper examines the application of error control coding techniques in Li-Fi systems with the aim of improving the reliability and efficiency of optical wireless communications. Starting from the specifics of the optical channel with intensity modulation and direct detection (IM/DD), the main sources of signal degradation are analyzed, including ambient noise, thermal noise, photodetector noise, and limitations of optical transmission in indoor environments. The focus is placed on the application and comparative analysis of different coding techniques, including block codes, Reed–Solomon codes, BCH codes, convolutional codes, and LDPC codes, in terms of their ability to reduce the probability of errors in data transmission. The paper considers the impact of these techniques on key performance metrics such as bit error rate (BER), coding gain, latency, decoding complexity, and system energy efficiency. It also analyzes the compatibility of the selected coding techniques with Li-Fi system requirements, especially in scenarios with high data rates, limited hardware resources, and increased sensitivity to noise and interference.