<p>As global demand for high-speed telecommunications and Internet of Things (IoT) services continues to rise exponentially, the limitations of the crowded radio frequency (RF) spectrum are becoming more apparent. With bandwidth scarcity leading to increased latency, interference, and data bottlenecks, alternative solutions are urgently needed. Visible Light Communication (VLC) is gaining momentum as a next-generation wireless technology capable of alleviating these constraints. Operating within the visible spectrum, VLC provides an unlicensed, high-bandwidth alternative that offers significant advantages in terms of data rate, availability, reliability, and physical-layer security. This work proposes a novel wireless optical communication system specifically designed for outdoor use. The system incorporates forward error correction (FEC) through space-time block coding (STBC) to enhance resilience against signal degradation, noise, and environmental interference. A comprehensive simulation was conducted to evaluate system performance under varying weather conditions, including dry, rainy, and foggy scenarios. The proposed system demonstrated successful data transmission rates of 15 Gbps across a 100-meter link using four white LEDs as the light sources. Bit error rate (BER) was maintained at 10⁻³, with corresponding signal-to-noise ratio (SNR) values of 21 dB in dry weather, 22 dB in rain, and 23 dB in fog. These results indicate strong performance and robustness across diverse environmental conditions, outperforming previous VLC configurations. This study not only underscores the viability of VLC as a high-speed, secure alternative to RF-based communication but also lays the groundwork for future development. Upcoming efforts will focus on hardware prototyping, real-world testing, and adaptive algorithms to further enhance system reliability.</p>