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Validation of a software-defined baseband system for satellite telemetry and telecommand
Luleå tekniska universitet, Institutionen för system- och rymdteknik, Rymdteknik. REMOS Space Systems AB, Luleå, Sweden.ORCID-id: 0000-0002-1316-1423
Luleå tekniska universitet, Institutionen för system- och rymdteknik, Rymdteknik.ORCID-id: 0000-0001-8959-5319
Luleå tekniska universitet, Institutionen för system- och rymdteknik, Signaler och system.ORCID-id: 0000-0001-8647-436X
2021 (Engelska)Ingår i: International Journal of Satellite Communications And Networking, ISSN 1542-0973, E-ISSN 1542-0981, Vol. 39, nr 6, s. 605-625Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This paper presents the validation of a software-defined baseband (SDB) system for satellite telemetry and telecommand (TM/TC). The baseband system was developed using the open-source GNU Radio development kit. It runs on a personal computer connected to a commercial-off-the-shelf (CoTS) RF frontend. The validation process was performed by the use of a mission-qualified satellite emulator, a state-of-the-art baseband unit, and orbiting satellites. The baseband is designed to offer multimission support. Hence, it includes a suite of modulation schemes, line codes, matched filters, and Consultative Committee for Space Data Systems (CCSDS) forward error correction codes (convolutional, Reed–Solomon, concatenated, and low-density parity-check [LDPC]) typically employed in TM/TC missions. The figures of merit used for the validation of the TM receiver are bit error rate (BER) and frame error rate (FER). For the TC transmitter, the validated features are modulation index, power spectrum, and the physical layer operations procedures (PLOP).

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2021. Vol. 39, nr 6, s. 605-625
Nyckelord [en]
satellite ground operations, software-defined radio, telecommand, telemetry
Nationell ämneskategori
Signalbehandling
Forskningsämne
Rymdtekniska system; Signalbehandling
Identifikatorer
URN: urn:nbn:se:ltu:diva-81498DOI: 10.1002/sat.1404ISI: 000651029800001Scopus ID: 2-s2.0-85105924996OAI: oai:DiVA.org:ltu-81498DiVA, id: diva2:1502784
Forskningsfinansiär
Rymdstyrelsen
Anmärkning

Validerad;2021;Nivå 2;2021-10-20 (alebob);

Funder: Swedish Space Corporation (SSC) ; Rymd för Innovation och Tillväxt (RIT)

Tillgänglig från: 2020-11-21 Skapad: 2020-11-21 Senast uppdaterad: 2023-09-05Bibliografiskt granskad
Ingår i avhandling
1. A Software-Defined Baseband for Satellite Ground Operations: Feasibility and Design
Öppna denna publikation i ny flik eller fönster >>A Software-Defined Baseband for Satellite Ground Operations: Feasibility and Design
2021 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Satellite telemetry, tracking, and command (TT&C) is a crucial activity needed to maintainthe health of a spacecraft or sometimes to facilitate payload data download. TT&Cground operations are facilitated by a communication device known in the TT&C communityas a baseband. State-of-the-art baseband systems currently in the market haveseveral financial and technical limitations. Financial drawbacks include high capital expenditure,operational expenditure, maintenance costs, and high upgrade costs, whiletechnical limitations include both upgradability and scalability.This thesis presents the feasibility study of a software-defined baseband (SDB) as aviable alternative to existing basebands. The SDB considered here is implemented on aradio architecture that consists of a general-purpose processor for performing radio functionsand low-cost commercial-off-the-shelf, software-defined radio frontends for signalsampling. The research questions focus on the feasibility and design aspects of this SDB.This thesis approaches the design of the SDB with a software development cyclethat involves functional analysis (design), verification, and validation of the radio functionsconstituting the SDB system. The radio functions are the telemetry receiver andthe telecommand transmitter. Functional analysis is performed through functional flowblock diagrams. The verification process is performed through simulations that take intoaccount realistic channel impairments for missions operating in the S-band and characterizedby the Consultative Committee for Space Data Systems (CCSDS) as category Amissions (less than 2 million km). Validation is performed on a laboratory testbed andseveral orbiting satellites.Through the above software development cycle, the telemetry receiver and telecommandtransmitter are developed using the open-source GNU radio development kit. Modulationschemes, line codes, and filters along with CCSDS forward error correction codescommonly employed in TT&C communications are successfully designed, verified in simulations,and validated in a hardware testbed. The performance results from the validationtests demonstrate that it is feasible to implement the SDB TT&C radio functions on theadopted radio architecture.Finally, this thesis investigates in detail the novel concept of multiple spacecraft peraperture (MSPA) that enables communication with several spacecraft from a single antenna.It focuses on in-band interference and out-of-band emissions arising from radiatingmultiple telecommand links from a low-cost SDR frontend. An MSPA transceiver is successfullydeveloped and integrated into the SDB system. Validation tests show that itis feasible for the integrated MSPA transceiver to radiate two telecommand links whileconforming to spectral regulations.

Ort, förlag, år, upplaga, sidor
Luleå: Luleå University of Technology, 2021. s. 220
Serie
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
Nyckelord
Software-Defined Radios, Satellite Ground Operations, Satellite Telemetry, Command, and Tracking
Nationell ämneskategori
Elektroteknik och elektronik
Forskningsämne
Rymdtekniska system
Identifikatorer
urn:nbn:se:ltu:diva-81500 (URN)978-91-7790-717-6 (ISBN)978-91-7790-718-3 (ISBN)
Disputation
2021-02-15, D1, Rymdcampus, Bengt Hultqvists väg 1, Kiruna, 13:00 (Engelska)
Opponent
Handledare
Tillgänglig från: 2020-11-23 Skapad: 2020-11-21 Senast uppdaterad: 2023-09-05Bibliografiskt granskad

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Browne Mwakyanjala, Mosesde Oliviera, Élcio Jeronimovan de Beek, Jaap

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