A LED visible light communication system is proposed based on frequency division multiplexing (FDM) technique. Which can transmit analog and digital signals by different channels with a single LED.

FORT DRUM, N.Y. (WWTI) – A letter home from 80 years ago is serving as a window to the past. The 10th Mountain Division ...

As the 10th Mountain Division (LI) renewed its focus on alpine and cold-weather training, light infantry units were being conditioned ... “As we got into that footage, we watched the World War II-era ...