Abstract:
Space laser is an emerging technology which is gaining more popularity because not
only it provides greater and unlicensed bandwidth but also the Size, weight, and
power (Swap) is reduced as compared to current radiofrequency (RF) system. Since
this communication is over a long distance this technology faces some challenges like
weather condition, atmospheric turbulence and electromagnetic turbulence. This research
focuses on addressing these issues by balancing Differential Phase Shift keying
(DPSK) and wavelength Phase shift keying. The proposed model works efficiently for
Earth to LEO satellite links in low to medium turbulence. Main focus of the research
is to analyze the system’s Bit Error Rate (BER) performance over varying communication
distance.The results show that over long distances of thousands of kilometers
the proposed model gives acceptable BER values even at maximum value of Earth
to LEO satellite link. It is observed that Optical wireless links offer numerous benefits
over radio frequency links, but they are susceptible to atmospheric conditions.
The combined WSK and DPSK model work efficiently to mitigate the effect of atmospheric
turbulence.
