Abstract
Free space optical (FSO) communication technology has been identified as a promising, complementary solution to the existing radio frequency (RF) solution because of its support for high speed data transmission. Though FSO has tremendous potential to compete with existing communication technologies, turbulence in atmosphere affects the propagation path of the optical beam and limits its system performance. This paper investigates the impact of turbulent atmosphere on the received optical irradiance which carries an asymmetrically clipped optical OFDM (ACO-OFDM) data signal. The FSO communication system employs intensity modulation/direct detection (IM/DD) scheme. An analytical model is developed to capture the turbulence effect with the assumption that the beam-wander plays a dominant role in determining the intercepted signal irradiance at the receiver aperture. The bit-error rate (BER) of the photo-detected signal is evaluated for weak-, moderate- and strong-turbulent channels assuming that the optical beam has Gaussian distributed profile whose beam width is affected by beam-wander. Numerical simulation results provide an insight into the role of various system parameters on received signal for a desired performance.
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Mali, S., Ratnam, J. (2021). Performance of a Free Space Optical Link with ACO-OFDM-Based Signal Transmission Under Beam-Wander-Dominated Atmospheric Turbulence. In: Sharma, R., Mishra, M., Nayak, J., Naik, B., Pelusi, D. (eds) Green Technology for Smart City and Society. Lecture Notes in Networks and Systems, vol 151. Springer, Singapore. https://doi.org/10.1007/978-981-15-8218-9_20
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DOI: https://doi.org/10.1007/978-981-15-8218-9_20
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