Forward error correcting code for high data rate LEO satellite optical downlinks

Poulenard, Sylvain; Gadat, Benjamin; Chouteau, Jean-Frederic; Anfray, Thomas; Poulliat, Charly; Jégo, Christophe; Hartmann, Olivier; Artaud, Géraldine; Meric, Hugo

doi:10.1117/12.2536120

Cited by 6 publications

(6 citation statements)

References 12 publications

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“…The OGS receives data from a LEO satellite on a polar orbit at 693 km altitude, very similar in orbital characteristics to Sentinel 1 (https://sentinel.esa.int/web/sentinel/missions/sentinel-1). Every pass of the LEO over the OGS is split into six (6) sectors of equal duration that correspond to the elevation ranges [5][6][7], [7][8][9][10], [10][11][12][13][14][15], [15][16][17][18][19][20][21][22], [22-37], degrees. This convenient way of splitting the pass allows us to study the variability of the channel including all the effects in Table 2.…”

Section: Virtual Conference 30 March-2 April 2021mentioning

confidence: 99%

“…5, where the block diagram of the in-house waveform simulator used in this paper is presented. In low-complexity optical LEO DTE systems, it is very typical to use a receiver having an avalanche photodiode (APD) [15]. In this case, both shot noise and thermal noise are important for the detection statistics and are represented in Fig.…”

Section: Virtual Conference 30 March-2 April 2021mentioning

confidence: 99%

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System-level benefit of variable data rate in optical LEO direct-to-earth links

Arapoglou

Mazzali

2021

International Conference on Space Optics — ICSO 2020

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The paper investigates the benefits of employing a Variable Data Rate (VDR) scheme in optical Low Earth Orbit (LEO) Direct-to-Earth (DTE) links at system level. In contrast to the Constant Data Rate (CDR) transmission approach adopted in current systems of the kind, the VDR scheme allows to optimize the data rate of the optical link within a satellite pass. Indeed, both the link budget and the atmospheric effects heavily depend on the satellite elevation angle, which varies significantly within a satellite pass. In order to thoroughly carry out the system level comparison between VDR and CDR, the paper first addresses all necessary aspects involved, including channel modeling, waveform and interleaver dimensioning, and link budget issues. For the scenario evaluated in the paper, the average throughput improvement of VDR versus CDR is found to be 100%. The paper also addresses interesting trade-offs concerning possible concepts of operations (ConOps) of the link once the VDR is in place. This preliminary work will be followed up by the Agency with further industrialized technology developments and system refinements.

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Section: Virtual Conference 30 March-2 April 2021mentioning

confidence: 99%

Section: Virtual Conference 30 March-2 April 2021mentioning

confidence: 99%

System-level benefit of variable data rate in optical LEO direct-to-earth links

Arapoglou

Mazzali

2021

International Conference on Space Optics — ICSO 2020

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“…To alleviate the atmospheric phenomena impairments, another solution is to implement a powerful error‐correcting scheme, for instance, an FEC code associated with an interleaver 7 or an erasure code 15 . In both studies, the authors aim for quasierror free performance on the optical link.…”

Section: Related Work and Assumptionsmentioning

confidence: 99%

“…The payload plus the header are encoded by an error‐correcting code to get an optical codeword. A channel interleaver, row–column (see Figure 3A) or convolutional, helps to cope with the optical channel fadings 7,8 . This results in optical packets.…”

Section: Related Work and Assumptionsmentioning

confidence: 99%

“…We assume that an FEC scheme protects the bits transmitted on the optical link. This scheme consists in an error‐correcting code associated with an interleaver 7 in order to cope with the optical channel perturbations due to atmospheric phenomena (turbulence, 8 molecular absorption, 9 etc.). Other impairments affect the signal such as the laser phase noise 10 or the nonlinear distortion of the Mach–Zehnder modulator (MZM) 11 .…”

Section: Introductionmentioning

confidence: 99%

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Performance evaluation of a DVB‐S2 system with a digital optical feeder link

Meric¹,

Péricart²

2020

Satell Commun Network

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We investigate the physical layer performance of a DVB-S2 system with a digital optical feeder link. We consider three scenarios depending on how the DVB-S2 modulator functionalities are distributed between the optical gateway and the satellite. Our main objective is to specify the residual bit error rate of the optical channel error correction scheme in order to ensure a quasierror free link to the users. To that end, we provide theoretical models and/or simulations results. In two scenarios, our results show that a residual bit error rate of 10 −4 (assuming equally distributed errors) gives end-to-end physical layer performance compliant with the DVB-S2 standard. This specification is much higher than typical values in practical systems. K E Y W O R D S digital optical feeder link, digital video broadcasting (DVB), performance evaluation 1 | INTRODUCTION Satellite communications systems require to reduce the overall cost per bit in order to remain competitive with terrestrial solutions and to offer affordable high-speed Internet services. Increasing the total capacity is a logical way to reach these objectives. To that end, high and very high throughput satellite (HTS/VHTS) systems are mainly looking for more bandwidth. 1-3 The multibeam concept using narrow beams combined with frequency reuse enables to maximize the available user link bandwidth. In addition, the satellite operation frequencies are moving from the Ku-band to the Ka-band and beyond (Q/V band). However, HTS and VHTS systems face important challenges such as bandwidth scarcity and ground network size. 3 To tackle these issues, an alternative is to replace the radiofrequency (RF) feeder link by an optical link using the 1550-nm wavelength as depicted in Figure 1. 3-5 Optical technologies benefit from large available bandwidths and less interference issues (due to very narrow beams). We investigate the physical layer performance of a DVB-S2 1 system with a digital optical feeder link. An important matter is how the DVB-S2 modulator features 6 are distributed between the optical ground station (OGS) and the satellite as illustrated in Figure 2. This choice has strong consequences on the design and performance of the system. Our work focuses on three scenarios called regenerative, semiregenerative, and (digital) transparent. All the DVB-S2 modulator functionalities are done on-board in the regenerative case. At the opposite, the optical gateway handles everything in the (digital) transparent scheme. In the semiregenerative scenario, the OGS realizes the DVB-S2 forward error correction (FEC) encoding while the satellite manages the remaining features. The bitstream coming out the DVB-S2 modulator 1/2 serves to modulate the optical signal with a digital waveform such as OOK or DPSK. We assume that an FEC scheme protects the bits transmitted on the optical link. This scheme consists in an error-correcting code associated with an interleaver 7 in order to cope with the optical channel perturbations due to atmospheric phenomena (turbulence, 8 molecular ab...

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A Survey on Error–Correcting Codes for Digital Video Broadcasting

2021

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We expose a complete survey of error-correcting codes (ECC) for digital video broadcasting (DVB) to support information protection. This survey discusses the specific application of the adaptive ECC feature for terrestrial/satellite/handheld and cable of the first, second, and third generations. We provide and review an ECC technique overview on DVB standard with their technical transmission specifications. The critical contribution of this paper is to clarify the differences among different ECC technologies using in the three generations of DVB. The survey also provides future directions for the technology trend of ECC for DVB.

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Forward error correcting code for high data rate LEO satellite optical downlinks

Cited by 6 publications

References 12 publications

System-level benefit of variable data rate in optical LEO direct-to-earth links

System-level benefit of variable data rate in optical LEO direct-to-earth links

Performance evaluation of a DVB‐S2 system with a digital optical feeder link

A Survey on Error–Correcting Codes for Digital Video Broadcasting

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