Average BER of free-space optical systems in turbulent atmosphere with exponentiated Weibull distribution

Abstract

A computationally efficient expression is presented for evaluating the average bit error rate (BER) of an intensity-modulation and direct-detection free-space optical system with on-off keying signaling technique operating in turbulent atmosphere described by the exponentiated Weibull distribution. The presented numerical results show the effects of aperture averaging on the average BER under weak and moderate turbulence conditions, and are confirmed by Monte Carlo simulations.

Performance of FSO links under exponentiated Weibull turbulence fading with misalignment errors

“…Finally, new closed form expressions for the outage probability and average BER were derived. APPENDIX For the expression in (11) to be a valid PDF it must be non-negative and area under this PDF should be unity. The non-negativity of PDF f h (h) in (11) can be observed from Table I as the range of f h (h) in the possible domain of h is positive.…”

“…The approximate expressions for the bit error rate (BER) are derived in [8]- [11]. In [8], [11], the BER is obtained using Gauss-Laguerre quadrature rule, while Gauss-Hermite quadrature approximation is used in [9]. The average capacity of the optical wireless communication systems over EW distribution turbulence channels is derived in [12].…”

SER performance analysis of MPPM FSO system with three decision thresholds over exponentiated Weibull fading channels

“…When the SNR is equal to 25 dB, SERs are10 À 2 , 10 À 2 , 10 À 4 and 10 À 6 for 3 mm, 25 mm, 60 mm and 80 mm, respectively. This is due to the fact that the aperture averaged receiver will average the fluctuations over the aperture to enhance the system performance [15][16][17]. Compared with the FDT scheme in Figs.…”

“…Their studies show that EW distribution fits more accurately with the actual PDF data than GG and LN distributions under all aperture averaging conditions and weak-to-strong turbulence regime [14]. After that, the error performance of OOK and BPSK modulated FSO systems over EW fading channels has been further investigated by [15][16][17] with the effect of aperture averaging taken into account. OOK and BPSK are two important modulation schemes extensively used in many existing works while both of them actually have lower power efficiency for practical FSO applications compared to pulse position modulation (PPM).…”

An expression for average Bit Error Rate of Free Space Optical links over Exponentiated Weibull atmospheric turbulence channel

“…The average BER closed-form expression of IM/DD FSO systems with OOK modulation under the Exponentiated Weibull turbulence is presented in [21] and a further approximation is derived in [22].…”