Fast multiple-symbol detection for free-space optical communications

Riediger, M.L.B.; Schober, Robert; Lampe, Lutz

doi:10.1109/tcomm.2009.04.070118

Cited by 71 publications

(55 citation statements)

References 21 publications

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“…This can also be applied in indoors OWC using multiple LEDs and detectors [20]. The optical MIMO channel was studied in [13], [21]- [24]. In such a MIMO system, cross-talk between signals from different transmitters occurs.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Limits of Parallel Optical Wireless Channels: Capacity Results and Outage Formulation

Chaaban

Rezki

Alouini

2016

IEEE Trans. Commun.

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Section: Introductionmentioning

confidence: 99%

Fundamental Limits of Parallel Optical Wireless Channels: Capacity Results and Outage Formulation

Chaaban

Rezki

Alouini

2016

IEEE Trans. Commun.

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“…differential signalling based FSO system by means of (12). Having obtained the PDF, the average BER of the link is defined as [26]:…”

Section: Ber Expressionmentioning

confidence: 99%

“…The drawback of this scheme represents the dependency on the value of 0 and on the data pattern (i.e., stream bits 1 and 0) [1]. Fast multi-symbol detection which works based on block-wise decisions and a fast search algorithm was shown in [12]. The main drawback of this method is the trade-off between throughput and performance.…”

Section: Introductionmentioning

confidence: 99%

Impact of Link Parameters and Channel Correlation on the Performance of FSO Systems With the Differential Signaling Technique

Abadi¹,

Ghassemlooy²,

Zvánovec

et al. 2017

J. Opt. Commun. Netw.

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Abstract-We investigate the effects of link parameters and the channel correlation coefficient on the detection threshold, -factor, and bit-errorrate (BER) of a free space optical system employing the differential signalling scheme. In systems employing differential signalling scheme, the mean value of the signal is used as the detection threshold level, provided that differential links are identical or highly correlated. However, in reality the underlying links are not essentially identical and have a low level of correlation. To show the significance of the link parameters as well as the correlation coefficient, we derive analytical relations describing the effect of weak turbulence and we determine the improvement of -factor with the channel correlation. Further, for the same signal-to-noise ratio, we demonstrate that a link with a higher extinction ratio offers improved performance. We also propose a closed-form expression of the system BER. We present experimental results showing improved -factor for the correlated channel case, compared to the uncorrelated channel.

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“…Later, Uysal extended their discussion of pairwise error probability for coded OOK FSO links to the cases with independent Gamma-Gamma turbulence [33]. Riediger et al investigated a multiple symbol detection decision metric for OOK in both log-normal and Gamma-Gamma turbulence [34]. The results in these papers demonstrate that the performance of a single branch FSO link severely suffers from atmospheric turbulence and is far from satisfying the typical BER requirements for communication applications with practical SNRs.…”

Section: Literature Reviewmentioning

confidence: 99%