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

Symbol error rate performance analysis of soft-decision decoded MPPM free space optical system over exponentiated Weibull fading channels

“…Furthermore, the soft-decision decoding technique has better performance compared to the DDT, which is the best decoding method in Ref. [12]. The effect of aperture averaging on the SER performance of soft-decision decoding is similar to that of the DDT.…”

“…Most importantly, apart from the perfect fit to right tail of the PDF, the left tail of EW distribution is much better than G-G and LN distributions, which is essential in assessing the outage and error performances [7] . Due to this advantage, some works concerning the performance of an FSO communication system over EW fading channels have been reported in these years [8][9][10][11][12] .…”

“…Therefore, it is necessary to quantify the performances of MPPM-based FSO systems. So far, some works have been reported on the average bit error rate (ABER) or symbol error rate (SER) performances of the FSO system with the MPPM scheme [12,14,15,[18][19][20] . However, only Ref.…”

“…However, only Ref. [12] is performed over EW distribution. In that work, the SER performances of the MPPM-based FSO system have been investigated with three different hard-decision thresholds: fixed decision threshold (FDT), optimized decision threshold (ODT), and dynamic decision threshold (DDT).…”

“…This is because a larger aperture size can gather more transmitting power and average the intensity variations of the laser beam over the receiving aperture caused by pointing errors, thus enhancing the system performance. Figure 3 shows the SER comparison between softdecision decoding and the DDT [12] of hard-decision decoding schemes under moderate turbulence condition (Rytov variances σ 2 R ¼ 1.35) with three different aperture sizes (D ¼ 3, 25, and 60 mm). The EW parameters are obtained from Ref.…”