%0 Journal Article
%@usergroup simone
%3 lucena-design2.pdf
%4 sid.inpe.br/plutao/2020/12.07.15.08
%9 journal article
%@issn 2525-8761
%A Lucena, Antônio Macilio Pereira de,
%A Oliveira, Paulo Daving Lima,
%A Silva, Francisco de Assis Tavares Ferreira da,
%@secondarytype PRE PN
%B Brazilian Journal of Development
%D 2020
%F lattes: 7112277465715838 1 PereiradeLucenaOlivSilv:2020:DeFuDi
%K GMSK, Demodulator, Telemetry, Fully digital, Space communications.
%N 10
%P 79016-79040
%T Design of a Fully Digital GMSK Demodulator for Telemetry Space Link
%V 6
%X This paper presents the design of a coherent GMSK demodulator, with fully digital architecture, aimed at high speed (10 Mbps) space telemetry applications in which the absolute Doppler offset may reach up to 200 kHz. All functional modules that compose the demodulator are described through block diagrams and mathematical equations. The calculations for the determination of several design parameters are presented. The carrier phase and the symbol timing recovery modules are distinct from those found in the literature for this application and, therefore, original mathematical analysis for the project of such modules are performed. The performance of the proposed GMSK demodulator is evaluated via computational simulation. Besides the bit error rate under several operating conditions, the variance of the estimated parameters by the symbol and carrier synchronizers are measured and compared with theoretical bounds. The main results from computational simulations are presented and demonstrate remarkable performance of the designed demodulator.
%@area ETES
%@electronicmailaddress antonio.lucena@inpe.br
%@electronicmailaddress daving@dee.ufc.br
%@electronicmailaddress francisco.silva@inpe.br
%@documentstage simone
%@group CRCRN-COCRE-INPE-MCTIC-GOV-BR
%@group CRCRN-COCRE-INPE-MCTIC-GOV-BR
%@group CRCRN-COCRE-INPE-MCTIC-GOV-BR
%@nexthigherunit 8JMKD3MGPCW/3EUAPES
%@resumeid 8JMKD3MGP5W/3C9JGJL
%@resumeid
%@resumeid 8JMKD3MGP5W/3C9JH4L
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@versiontype publisher
%@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S}
%@doi 10.34117/bjdv6n10-364
%2 sid.inpe.br/plutao/2020/12.07.15.08.03