From S‐band mobile interactive multimedia to fixed satellite interactive multimedia: making satellite interactivity affordable at Ku‐band and Ka‐band

Arcidiacono, A.; Finocchiaro, Daniele; Collard, Florian; Scalise, Sandro; Blasco, Francisco Lázaro; Gaudenzi, R. De; Cioni, Stefano; Alagha, Nader; Andrenacci, Marco

doi:10.1002/sat.1158

Cited by 21 publications

(19 citation statements)

References 5 publications

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“…The considered scenario is composed of a population of Ultra-Low Power M2M terminals using E-SSA-based CDMA air-interface to asynchronously access the LEO/GEO satellite return link. Even though the considered air-interface is S-M2M, 6 which is an adaptation of the S-MIM E-SSA air-interface to 300 kHz channelization, the results of the present work can be easily extended to other E-SSA-based air-interface such as S-MIM [4] and F-SIM [6].…”

Section: Performance Assessmentmentioning

confidence: 99%

“…In addition, the same info payload and coding scheme are considered for all the possible transmission modes. In this light, it is possible to assume that the / margins of SF(64) and SF(256) are, respectively, 6 dB 10 64 and 12 dB 10 log 256 higher than the / margin of SF(16) thanks to their higher processing 6 The S-M2M standard is an extension of the S-MIM protocol, intended for access to interactive messaging services, since it does not require coordination between users thus minimizing the signaling overhead required for the access control. It has been developed in the framework of the ESA ARTES project Frequency Flexible M2M Terminal Modem Development [7].…”

Section: Performance Assessmentmentioning

confidence: 99%

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Feasibility of Energy Management Techniques for Ultra-low Power M2M SatCom Terminals

Alagha

Alonso-Zárate

Andrenacci³

et al. 2018

2018 9th Advanced Satellite Multimedia Systems Conference and the 15th Signal Processing for Space Communications Workshop (ASM

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The request for the provision of services relying on Machine to Machine (M2M) communications have increased a lot over the last years. This has led to the introduction of M2M communications also in the SatCom area. In this context, the design of ultra-low power terminals becomes indispensable. In this paper, a feasibility study for assessing the implementation of an innovative energy efficient technique for ultra-low power M2M SatCom terminals is proposed. By leveraging on the E-SSA (Enhanced Spread Spectrum ALOHA) protocol, the newly proposed technique jointly exploits the use of multiple Spreading Factors (SFs) for transmission together with a smart transmission manager which is able optimize the use of energy harvesting by dynamically deciding when and how to transmit data. The proposed solution has been tested in different SatCom scenarios, demonstrating its effectiveness in terms of overall throughput and energy consumption.

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Section: Performance Assessmentmentioning

confidence: 99%

Section: Performance Assessmentmentioning

confidence: 99%

Feasibility of Energy Management Techniques for Ultra-low Power M2M SatCom Terminals

Alagha

Alonso-Zárate

Andrenacci³

et al. 2018

2018 9th Advanced Satellite Multimedia Systems Conference and the 15th Signal Processing for Space Communications Workshop (ASM

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“…The SmartLNB [ 22 ] is an innovative IST engineered for Internet of Things (IoT) and machine-to-machine (M2M) applications (and hence it is a “smart” low-noise block converter). It is a bi-directional communication system which makes use of the digital video broadcasting satellite second generation (DVB-S2) [ 23 ] on the forward link (from the satellite hub to the SmartLNB) and fixed-satellite interactive multimedia (F-SIM) [ 24 ] on the return link (from the SmartLNB to the satellite hub) communication protocols.…”

Section: Architecture Of the Real-time Wide-area Rain-rate Measurementioning

confidence: 99%

Real-Time Rain Rate Evaluation via Satellite Downlink Signal Attenuation Measurement

Giannetti

Reggiannini

Moretti

et al. 2017

Sensors

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We present the NEFOCAST project (named by the contraction of “Nefele”, which is the Italian spelling for the mythological cloud nymph Nephele, and “forecast”), funded by the Tuscany Region, about the feasibility of a system for the detection and monitoring of precipitation fields over the regional territory based on the use of a widespread network of new-generation Eutelsat “SmartLNB” (smart low-noise block converter) domestic terminals. Though primarily intended for interactive satellite services, these devices can also be used as weather sensors, as they have the capability of measuring the rain-induced attenuation incurred by the downlink signal and relaying it on an auxiliary return channel. We illustrate the NEFOCAST system architecture, consisting of the network of ground sensor terminals, the space segment, and the service center, which has the task of processing the information relayed by the terminals for generating rain field maps. We discuss a few methods that allow the conversion of a rain attenuation measurement into an instantaneous rainfall rate. Specifically, we discuss an exponential model relating the specific rain attenuation to the rainfall rate, whose coefficients were obtained from extensive experimental data. The above model permits the inferring of the rainfall rate from the total signal attenuation provided by the SmartLNB and from the link geometry knowledge. Some preliminary results obtained from a SmartLNB installed in Pisa are presented and compared with the output of a conventional tipping bucket rain gauge. It is shown that the NEFOCAST sensor is able to track the fast-varying rainfall rate accurately with no delay, as opposed to a conventional gauge.

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“…This prospective "opportunistic" approach to the construction of rain maps has spurred the NEFOCAST project, funded by the Tuscany Region from 2016. A significant body of results on the project progress are already available in [6], [13]- [17]. The NEFOCAST project is based on the use of interactive domestic terminals capable of continuously measuring the received SNR and relaying the data to the operational center.…”

Section: Introductionmentioning

confidence: 99%

The NEFOCAST System for Detection and Estimation of Rainfall Fields by the Opportunistic Use of Broadcast Satellite Signals

Giannetti

Moretti

Reggiannini

et al. 2019

IEEE Aerosp. Electron. Syst. Mag.

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In this paper we present results from the NEFOCAST project, funded by the Tuscany Region, aiming at detecting and estimating rainfall fields from the opportunistic use of the rain-induced excess attenuation incurred in the downlink channel by a commercial DVB satellite signal. The attenuation is estimated by reverse-engineering the effects of the various propagation phenomena affecting the received signal, among which, in first place, the perturbations factors affecting geostationary orbits, such as the gravitational attraction from the moon and the sun and the inhomogeneity in Earth mass distribution and, secondly, the small-scale irregularities in the atmospheric refractive index, causing rapid fluctuations in signal amplitude. The latter impairments, in particular, even if periodically counteracted by correction maneuvers, may give rise to significant departures of the actual satellite position from the nominal orbit. A further problem to deal with is the daily and seasonal random fluctuation of the rain height and altitude/size of the associated melting layer. All of the above issues lead to non-negligible random deviations from the dry nominal downlink attenuation, that can be misinterpreted as rain events. In this paper we show how to counteract these issues by employing two differentially-configured Kalman filters designed to track slow and fast changes of the received signal-to-noise ratio, so that the rain events can be reliably detected and the relevant rainfall rate estimated.

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From S‐band mobile interactive multimedia to fixed satellite interactive multimedia: making satellite interactivity affordable at Ku‐band and Ka‐band

Cited by 21 publications

References 5 publications

Feasibility of Energy Management Techniques for Ultra-low Power M2M SatCom Terminals

Feasibility of Energy Management Techniques for Ultra-low Power M2M SatCom Terminals

Real-Time Rain Rate Evaluation via Satellite Downlink Signal Attenuation Measurement

The NEFOCAST System for Detection and Estimation of Rainfall Fields by the Opportunistic Use of Broadcast Satellite Signals

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