Outage probability of WDM free‐space optical systems affected by turbulence‐accentuated interchannel crosstalk

Mbah, Afamefuna Maduka; Walker, John; Phillips, Andrew J. K.

doi:10.1049/iet-opt.2016.0057

Cited by 32 publications

(30 citation statements)

References 28 publications

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“…The DPPM thermal noise variance is back calculated using a bandwidth expansion factor such that σ th−DPPM = 7 10 −7 A is obtained from a model of a positive-intrinsic-negative (PIN)field effect transistor receiver with R b = 2.5 Gbps at BER of 10 −12 assuming a sensitivity of 23 dBm [7,38,[42][43][44][45][46][47][48]. The demux (or OBPF) channel bandwidth is 80 GHz with 100 GHz adjacent channel spacing, this is about the same with those seen in [39,40] and will easily accommodate the slot rate of 45.7 GHz for maximum DPPM coding level of M = 7 considered [7,17,[46][47][48][49][50]. Typical values for adjacent channel rejection ratio ranges from 20 dB to 30 dB [7,[39][40][41][50][51][52][53][54].…”

Section: Resultsmentioning

confidence: 99%

“…Typical values for adjacent channel rejection ratio ranges from 20 dB to 30 dB [7,[39][40][41][50][51][52][53][54]. It can be deduced from the plots that the DPPM technique is capable of providing better performance when compared to the OOK-NRZ technique [7,[36][37][38][39][40][48][49][50][51][52][53][54]. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…When impaired by turbulence, the sensitivity improvement of DPPM over OOK-NRZ is reduced, respectively, to about 10 dB (WT), 8 dB (MT) and 8 dB, (ST) [Present]. An improvement of about 7 -9 dB (depending on the turbulence level) can be potentially achieved using the DPPM scheme over an equivalent on off keyed non return-to-zero based FSO system that presented in [7,17] .When impaired by turbulence, the sensitivity improvement of DPPM over OOK-NRZ is reduced, respectively, to about 7 dB (WT), 8 dB (MT) and 8 dB, (ST) [7,17,[46][47][48][49].…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Improved bit error rate evaluation of M-ary DPPM modulation using an aperture averaging for FSO systems impaired by interchannel crosstalk and ASE noise

Elsayed¹

2021

Preprint

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The performance evaluation of free-space optical (FSO) communication system using the digital pulse position modulation (DPPM) and on-off keying non-return-to-zero (OOK-NRZ) approach are investigated in this paper. The impact of atmospheric turbulence, scintillation and amplified spontaneous emission (ASE) noise has been taken into account. To reduce the turbulence-induced scintillation and optical power penalty, the use aperture averaging has been proposed in this paper. To evaluate the bit-error rate (BER) performance in the presence the atmospheric turbulence and amplified spontaneous emission (ASE), the use of the moment generation function techniques are explained with the modified Chernoff bound that is more accurate and an appropriate from Chernoff bound. Such a system, which could provide a power efficient, a low cost, excessive flexibility and reliable or considered a massive solution in the bandwidth provision for future access networks, and together for higher data rate. The BER, are given for an optically preamplified DPPM FSO communication system impaired by pointing error and atmospheric turbulence combined, in addition to the ASE noise arising from the optical amplification. The gamma–gamma distribution model is used to characterize the whole range of turbulence conditions. The results reveal the superiority of DPPM with improved receiver sensitivity (at a binary data rate 2.5 Gbps and at typical FSO BER of 10-9) of about 10 dB – 11 dB for coding level (M) of 5 and optical link length (for turbulent interaction) of 2000 m more than an equivalent optically preamplified OOK-NRZ approach, depending on the leve of turbulence.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Improved bit error rate evaluation of M-ary DPPM modulation using an aperture averaging for FSO systems impaired by interchannel crosstalk and ASE noise

Elsayed¹

2021

Preprint

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“…The scintillation index of fading is 1. The channel fading AMPLITIDE "a" for Rayleigh distribution or PDF gain is written in [15,[40][41][42][43][44][45] (a)=2ae −a 2 (45)…”

Section: A Rayleigh Distributionmentioning

confidence: 99%

“…The Lognormal model is used in cases less fading (weak turbulence) [38][39][40][41][42][43][44][45].…”

Section: B Log-normal Distributionmentioning

confidence: 99%

Design and performance enhancement of a dense wavelength division multiplexing MIMO-FSO systems using DPPM and OOK modulation

Elsayed

2021

Preprint

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In this paper, we design and analyze the dense wavelength division multiplexing (DWDM) in the multiple-input multiple-output (MIMO) free-space optical (FSO) communications system using the digital-pulse position modulation (DPPM) and on-off keying (OOK). We show the effects noises, interchannel crosstalk, and atmospheric turbulence for the proposed system in the weak and strong turbulence with the modulation techniques. DWDM channels suffer from the inter-channel crosstalk while the communication performance in an obviously limited by the MIMO-FSO caused by atmospheric scintillation. All Impairments, in addition to noises of the optical amplification which is emerged the amplified spontaneous emission and are likely to be problematic, particularly in the upstream direction, which are investigated, the results obtained a high enough crosstalk ratio can achieve access to high-capacity in a system network safe and human. DPPM is a more power efficient modulation and lower power penalty 0.2 ~ 0.3 dB from the OOK modulation.

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Performance enhancement of the power penalty in DWDM FSO communication using DPPM and OOK modulation

2018

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Outage probability of WDM free‐space optical systems affected by turbulence‐accentuated interchannel crosstalk

Cited by 32 publications

References 28 publications

Improved bit error rate evaluation of M-ary DPPM modulation using an aperture averaging for FSO systems impaired by interchannel crosstalk and ASE noise

Improved bit error rate evaluation of M-ary DPPM modulation using an aperture averaging for FSO systems impaired by interchannel crosstalk and ASE noise

Design and performance enhancement of a dense wavelength division multiplexing MIMO-FSO systems using DPPM and OOK modulation

Performance enhancement of the power penalty in DWDM FSO communication using DPPM and OOK modulation

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