&lt;title&gt;Evaluation of free-space optical communication system in metropolitan Tokyo area&lt;/title&gt;

The performances of the decode-and-forward (DF) multihop free-space optical communication system with exponentiated Weibull distribution considering the fading induced by pointing error have been studied. With Meijer's G-function, the probability density function (PDF) of the aggregated channel model and the closed-form expression for the average bit error rate (ABER) of binary pulse position modulation are derived. The average bit-error-rate performance is then investigated with different hop numbers H, turbulence strength values, receiver aperture sizes, beamwidths, and jitter variances. Compared with the case without pointing error, the mitigation effect of aperture averaging for fading is more significant over the aggregated channel, regardless of the selected H, and it is less effective for the degradation induced by the increase in H, which can be restrained by larger beamwidth and lower jitter. The outage probability is also investigated, and the results show that aperture averaging has less of an effect on the outage probability under moderate turbulence than that under the weak turbulence condition at a given value of H, which is different from the scenario without pointing error. After this, the end-to-end average capacity is analyzed. Monte Carlo simulation is provided to confirm the validity of the proposed ABER expression.Index Terms: Exponentiated Weibull distribution, average bit error rate (ABER), decode and forward (DF), multihop free-space optical communication, pointing error.

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“…Substituting (23) into (16), the closed form end-to-end ABER expression without pointing error is obtained as …”

Section: Negligible Pointing Errormentioning

confidence: 99%

“…l and k are the integer numbers that satisfy l=k ¼ i =2. Substituting (32) into (16), the closed form end-to-end ABER expression is obtained as …”

Section: Non-negligible Pointing Errormentioning

confidence: 99%

Performance Analysis for Relay-Aided Multihop BPPM FSO Communication System Over Exponentiated Weibull Fading Channels With Pointing Error Impairments

et al. 2015

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“…1. Outdoor experimental evaluation of a real FSO mesh network communication system was performed by Kaneko et al in 2002 in the Tokyo metropolitan area [8]. This was the first report on ascertaining the effectiveness of routing in a FSO mesh network.…”

mentioning

confidence: 99%

Experimental verification of an all-optical dual-hop 10 Gbit/s free-space optics link under turbulence regimes

et al. 2015

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This Letter presents original measurement results from an all-optical 10 Gbit/s free-space optics (FSO) relay link involving two FSO links and an all-optical switch. Considering the fact that reported analyses of relay links are dominated by analytical findings, the experimental results represent a vital resource for evaluating the performance of relay FSO links in the presence of atmospheric turbulence. Bit-error-rate (BER) performance of the relay system is tested for single and dual-hop links under several turbulence regimes. Furthermore, results from this measurement are used to ascertain real parameters of the outdoor links and to improve the accuracy of simulation results. Results show that using a dual-hop FSO link against a single FSO link could result in up to four orders of magnitude improvement in BER in the presence of atmospheric turbulence.

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<title>Evaluation of free-space optical communication system in metropolitan Tokyo area</title>

Cited by 2 publications

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Performance Analysis for Relay-Aided Multihop BPPM FSO Communication System Over Exponentiated Weibull Fading Channels With Pointing Error Impairments

Performance Analysis for Relay-Aided Multihop BPPM FSO Communication System Over Exponentiated Weibull Fading Channels With Pointing Error Impairments

Experimental verification of an all-optical dual-hop 10 Gbit/s free-space optics link under turbulence regimes

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