Free space optical (FSO) relay communication systems based on unmanned-aerial-vehicle (UAV) play an important role in various communication scenarios. In this paper, a UAV-assisted FSO relay system ...

Modulating the intensity of light-emitting diodes (LEDs) with analog signals, especially in the case of the bipolar optical orthogonal frequency-division-multiplexing (O-OFDM) signal, leads to ...

Transistor as a switch. Communication Systems:Elements of a communication system (block diagram onbly); bandwidth of signals (speech, TV and digital data); bandwidth of transmission medium.