The Acquisition Method of Symmetry Chirp Signal Used in LEO Satellite Internet of Things

Qian, Yubi; Ma, Lu; Liang, Xuwen

doi:10.1109/lcomm.2019.2926262

Cited by 22 publications

(8 citation statements)

References 11 publications

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“…To overcome the Doppler effects in such systems, the authors in [153] come up with a new air interface for NB-IoT based on Turbo-FSK modulation, which was firstly introduced in [154]. Regarding LoRA, in [155] a new acquisition method under increased Doppler effects is analyzed, while in [156] a folded chirp-rate shift keying (FCrSK) modulation with strong immunity to Doppler effect is proposed. Other works in the literature focus on IoT over GEO orbits, where the main issue would be the increased round RTT of communication.…”

Section: Data Collectionmentioning

confidence: 99%

Satellite Communications in the New Space Era: A Survey and Future Challenges

Kodheli

Lagunas

Maturo

et al. 2021

IEEE Commun. Surv. Tutorials

765

428

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Satellite communications (SatComs) have recently entered a period of renewed interest motivated by technological advances and nurtured through private investment and ventures. The present survey aims at capturing the state of the art in SatComs, while highlighting the most promising open research topics. Firstly, the main innovation drivers are motivated, such as new constellation types, on-board processing capabilities, nonterrestrial networks and space-based data collection/processing. Secondly, the most promising applications are described i.e. 5G integration, space communications, Earth observation, aeronautical and maritime tracking and communication. Subsequently, an in-depth literature review is provided across five axes: i) system aspects, ii) air interface, iii) medium access, iv) networking, v) testbeds & prototyping. Finally, a number of future challenges and the respective open research topics are described.

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Section: Data Collectionmentioning

confidence: 99%

Satellite Communications in the New Space Era: A Survey and Future Challenges

Kodheli

Lagunas

Maturo

et al. 2021

IEEE Commun. Surv. Tutorials

765

428

View full text Add to dashboard Cite

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“…In order to overcome this issue, [73] introduces a low cross-correlation symmetry chirp signal (SCS) that noticeably improves PHYlayer performance. The acquisition of a SCS is then discussed in [74]. The paper of Qian, Ma and Liang [75] partially revised the approach of [73], by proposing another typology of chirp signal for satellite IoT transmission, namely: the asymmetry chirp signal (ACS), which is obtained by a modification of SCS.…”

Section: A Innovative Approaches To Tackle Technical Challengesmentioning

confidence: 99%

A Survey on Technologies, Standards and Open Challenges in Satellite IoT

Centenaro¹,

Costa

Granelli

et al. 2021

IEEE Commun. Surv. Tutorials

228

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The Internet of Things (IoT) is expected to bring new opportunities for improving several services for the Society, from transportation to agriculture, from smart cities to fleet management. In this framework, massive connectivity represents one of the key issues. This is especially relevant when IoT systems are expected to cover a large geographical area or a region not reached by terrestrial network connections. In such scenarios, the usage of satellites might represent a viable solution for providing wide area coverage and connectivity in a flexible and affordable manner. Our paper presents a survey on current solutions for the deployment of IoT services in remote/rural areas by exploiting satellites. Several architectures and technical solutions are analyzed, underlining their features and limitations, and real test cases are presented. It has been highlighted that low-orbit satellites offer an efficient solution to support long-range IoT services, with a good trade-off in terms of coverage and latency. Moreover, open issues, new challenges, and innovative technologies have been focused, carefully considering the perimeter that current IoT standardization framework will impose to the practical implementation of future satellite based IoT systems.

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“…The cloud data center processes the data passed by the middleware and provides various services. On this basis, various applications have been formed to construct an intelligent cancer rehabilitation medical recommendation system [18].…”

Section: Related Work a Application Of Iot In Medical Fieldmentioning

confidence: 99%