A Review On FSO By Using Different Modulation Techniques

Abstract

Now a days as we are seeing that the free space optics is one of the emerging technology used for the replacement of the radio frequency wireless communication, due to their advantages over it like cost, speed, bandwidth, minimum error as well as efficient communication. The quality of services provided by the FSO is far better than the RF communication network. The free space optics is unlicensed band which make it less costly than the licensed band technology. As the atmospheric channel is used for transmission the effects of atmospheric condition effects the communication. In this paper we try to discuss all the modulation schemes which help to improve the performances of the optic system.

Low Power FPGA Implementation of a Smart Building Free Space Optical Communication System

“…Attenuation jeopardizing the quality of the received signal is the main driver of the transmitter specifications, including transmission configuration and the modulation scheme used. Originally, OOK is the simplest form a signal is modulated by where only one bit is sent in each clock cycle, where digital 1 is represented by full illumination, while digital 0 is represented when the laser is off [22]. The OOK is frequently plagued by spectral and energy efficiency issues.…”