A Soft-Output STBC Decoder for Aeronautical Telemetry

• Autorzy: Louёt Yves , Othman Rami , Skrzypczak Alexandre

Identyfikatory

DOI

10.26636/jtit.2020.138319

• Języki publikacji: EN

Abstrakty

EN

Alamouti encoding is a well-known space time block encoding technique used to improve the received signal quality in Rayleigh fading channels. In aeronautical telemetry, this encoding technique is applied to shaped offset quadrature phase shift keying tier generation (SOQPSK-TG) modulation in order to handle the two-antenna issue. It is provided for in telemetry-related IRIG standards. In this paper, we propose a unique decoding architecture for Alamouti-encoded SOQPSK-TG signals, taking advantage of pulse amplitude modulation decomposition with soft and hard outputs. We exploit this result to obtain a Viterbi algorithm (VA) for hard decoding and a soft output Viterbi algorithm (SOVA) for soft and hard decoding, with a twofold benefit: operation using one trellis structure, unlike decoders that are based on the 8-waveforms cross-correlated trellis-coded quadrature modulation (XTCQM) approximation, and very attractive bit error rate performance, as well as a complexity trade-off.

Słowa kluczowe

EN

continuous-phase modulation; CPM; pulse amplitude modulation; PAM; shaped offset quadrature phase shift keying; SOQPSK; space-time block coding; STBC; ternary symbol

• Wydawca: Instytut Łączności - Państwowy Instytut Badawczy
• Czasopismo: Journal of Telecommunications and Information Technology
• Rocznik: 2020
• Tom: nr 1
• Strony: 13--20
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Louёt Yves

• IETR/CentraleSupélec, Avenue de la Boulaie, 35576 Cesson-Sévigné, France

autor

Othman Rami

• Zodiac Data Systems, 14460 Colombelles, France
• IETR/CentraleSupélec, Avenue de la Boulaie, 35576 Cesson-Sévigné, France

autor

Skrzypczak Alexandre

• Zodiac Data Systems, 14460 Colombelles, France

Bibliografia

• [1] IRIG, „Telemetry Standards", IRIG Standard 106-17 Part 1, Chapter 2", July 2017 [Online]. Available: http://www.irig106.org/docs/106-17/106-17_Telemetry_Standards.pdf
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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).