Ritu Namdeo, Swapnil Nema
Free space optical (FSO) communication, is a technology in which information is being transferred from one transmitter to another receiver by propagating light in atmosphere. Its working is similar to that of Optical Fiber Cables (OFC) networks but it does not require any cables. FSO communication is both faster and cost-effective technique as compared to conventional optical fiber communication. When it is combined with the digital modulation scheme, a lot of benefits such as Bandwidth, S/N, cost etc. can be achieved. In the proposed work, On-Off Keying (OOK), and Phase–Shift Keying (PSK) techniques have been compared. The most important parameters we have considered are: Q-factor, Bit Error Rate (BER) and eye opening. We have studied modulation schemes for the fulfillment of three tasks, which are efficiency of a transmission data, resistivity to a non-linearity and ease of implementation.
OOK, PSK, BER, FSO, DPSK, OQPSK, CW, NRZ, RZ, MZ, OSNR.