Gaussian approximation versus nearly exact performance analysis of optical communication systems with PPM signaling and APD receivers

Davidson, F.; Sun, Xiaoli

doi:10.1109/26.8924

Cited by 80 publications

(35 citation statements)

References 14 publications

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“…As in fiber systems, avalanche photodetectors provide one way to make the optical (shot) noise exceed the electronic/thermal noise. This comes at the expense of an excess noise penalty, however, that will degrade performance from the ideal photon-counting analysis here [30]. Analysis of APD receivers with thermal additive noise is currently under study.…”

Section: Conclusion and Extensionsmentioning

confidence: 99%

“…2) Fading Case: To find the ergodic capacity with channel fading, we multiply the conditional capacity expression by the pdf for and integrate (29) Given the assumed independence of the fading variables, it is straightforward to show that (30) In the Rayleigh case, the last integral can be computed easily, giving (31) Fig. 7 shows the ergodic capacity for log-normal fading for different MIMO configurations, clearly showing the benefits of additional lasers and/or photodetectors.…”

Section: A Case I: No Background Radiationmentioning

confidence: 99%

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Optical repetition MIMO transmission with multipulse PPM

Wilson

Brandt-Pearce

Cao

et al. 2005

IEEE J. Select. Areas Commun.

206

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Abstract-We study the use of multiple laser transmitters combined with multiple photodetectors for atmospheric, line-of-sight optical communication, and focus upon the use of multiple-pulseposition-modulation as a power-efficient transmission format, with signal repetition across the laser array. Ideal (photon counting) photodetectors are assumed, with and without background radiation. The resulting multiple-input/multiple-output channel has the potential for combating fading effects on turbulent optical channels, for which both log-normal and Rayleigh-fading models are treated. Our focus is upon symbol error probability for uncoded transmission, and on capacity for coded transmission. Full spatial diversity is obtained naturally in this application.Index Terms-Multiple-input/multiple-output (MIMO) systems, optical communications, pulse-position-modulation (PPM).

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Section: Conclusion and Extensionsmentioning

confidence: 99%

Section: A Case I: No Background Radiationmentioning

confidence: 99%

Optical repetition MIMO transmission with multipulse PPM

Wilson

Brandt-Pearce

Cao

et al. 2005

IEEE J. Select. Areas Commun.

206

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“…A BER of 10-6 was achieved at 55 detected photons per source information bit with this system. The solid curve represents the theoretically expected value of BER at constant average APD gain using the analytical methods described in [4] assuming perfect timing recovery in the receiver.…”

Section: Recewer Technologymentioning

confidence: 99%

<title>Goddard optical communications program</title>

Seery

1990

SPIE Proceedings

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“…It is well known that shot-noise arises from random fluctuations of the current flowing through the photo-detector and is modeled by a Poisson process. However, it has been shown in [13] and [14] that this distribution can be approximated by a Gaussian distribution. Therefore, for both architectures, at a "quasi-abstract" level, one can make the assumption that the detection noise is an AWGN as long as it is assumed that only estimates of the subsequent error-rate and channel capacity are investigated.…”

Section: B Noise and Block Fading Channel Modelmentioning

confidence: 99%

Evaluation of communication performance for adaptive optics corrected geo-to-ground laser links

Canuet

Védrenne

Conan

et al. 2017

International Conference on Space Optics — ICSO 2016

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I. INTRODUCTION By using existing single mode components developed for fiber technologies (optical detectors and amplifiers, MUX/DEMUX...), the very high throughput of future satellite-to-ground optical communication links might be achievable at a reasonable cost. However, atmospheric turbulence induced perturbations compromise the injection efficiency of the wave into single mode components. The resulting channel impairments can be significantly reduced by the use of appropriate adaptive optics (AO) compensation at the expense of potentially complex and expensive systems if very high stability of the injection is required. Feasibility demonstrations of AO correction were recently reported in the US [1] and France [2] with Low Earth Orbit (LEO) satellites, and in Germany with GEO satellites [3]. To reduce the loss in useful information and to relax by the same way the specifications and cost of AO systems, numerical techniques such as error-correcting codes have to be considered as well. These codes introduce a degree of data redundancy, which allows a transmitted codeword to be correctly interpreted despite the loss of a significant fraction of the individual codeword elements. However, they are usually adapted to combat randomly distributed errors rather than bursty errors. Therefore, over the free-space optical channel, a fading event that is much longer than the codeword duration will usually result in an unrecoverable loss of information. To overcome this non-uniform distribution of errors that occur in slow fading channels, symbol interleaving is mandatory. Such numerical interleavers after disassembling each codeword will space the individual symbols with a temporal interval comparable to a characteristic duration of the channel fades. At the receiver, the symbols are reassembled in the proper order but the errors are redistributed such that there is a higher probability that each codeword is correctly decoded and reconstructed. In addition to the drawback induced by the latency introduced by the symbol spreading, this interleaving process could lead to unmanageable buffer size. Extensive work on numerical approaches to mitigate channel impairments were conducted in the US [4], Germany [5] and Japan [6]. Whereas the AO correction will impact the temporal characteristics of the channel and can therefore, in turn, diminish the drawbacks related to the interleaving process, none of the reported work considered the influence of the AO residuals on the characteristics of the channel. Consequently, the need for a joint optimization of the performances of the AO system and the interleaving process, with respect to power constraints and coding rate, appears necessary. In this paper, appropriate telecom metrics such as the channel capacity and outage probabilities are computed using a simplified AO corrected channel model to assess the influence of AO residuals on the required interleaver size. The specific case of a GEO to ground link with on-off keying (OOK) modulation is addressed. The outline of this paper is ...

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Gaussian approximation versus nearly exact performance analysis of optical communication systems with PPM signaling and APD receivers

Cited by 80 publications

References 14 publications

Optical repetition MIMO transmission with multipulse PPM

Optical repetition MIMO transmission with multipulse PPM

<title>Goddard optical communications program</title>

Evaluation of communication performance for adaptive optics corrected geo-to-ground laser links

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