BER Analysis of PolSK Modulation for FSO Communication System with Generalized Pointing Error over Double GG Turbulence Channel

Free Space Optical (FSO) communication offershigh data transfer rates and bandwidth scalability. Atmospheric turbulence is the decisive factor in the performance of FSO communication system. Double Generalized Gamma (GG) distribution is used to model the irradiance fluctuations of FSO channel covering all atmospheric turbulence conditions and Polarization Shift Keying (PolSK) modulation is used. Also, we consider the impact of generalized pointing errors along with non-zero boresight displacement. We derive the analytical expression of the Bit Error Rate (BER)and analyze its performance for average electricalSignal to Noise Ratio (SNR) from 0dB to 50dB under allturbulence condition. From the results, we observe that BER is less for higher average electrical SNR whereas, BER is high for higher spatial jitter. Further, BER is increased for higher normalized beam width with enchanced misalignment effect.