Examining the Tolerance of GNSS Receiver Phase Tracking Loop Under the Effects of Severe Ionospheric Scintillation Conditions Based on Its Bandwidth

Autor(es)

Portella, Igor Ponte ^[1] ; Moraes, Alison ^[2] ; da Silva Pinho, Marcelo ^[3] ; Sousasantos, Jonas ^[3] ; Rodrigues, Fabiano ^[4]

Afiliação do(s) autor(es)

^[1] Inst Pesquisas & Ensaios Voo IPEV Sao Jose dos Ca, Dos Campos - Brazil

^[2] Inst Aeronaut & Espaco IAE Sao Jose dos Campos, Dos Campos - Brazil

^[3] Inst Tecnol Aeronaut ITA Sao Jose dos Campos, Dos Campos - Brazil

^[4] Univ Texas Dallas UT Dallas, William B Hanson Ctr Space Sci, Richardson, TX - USA

• Tipo de documento: Artigo Científico
• Fonte: RADIO SCIENCE; v. 56, n. 6 JUN 2021.
• Citações Web of Science: 0

Resumo

This study aims to evaluate the performance of phase-locked loop (PLL) under the presence of distinct scintillation patterns in the signal. Scintillation is very common in low-latitude regions due to the ionospheric dynamics. Under strong scintillation scenario the occurrence of deep fading events is usually registered and may cause severe degradation in the communication. The investigation conducted in this study uses the amplitude scintillation index S-4, the decorrelation time tau 0, and the bandwidth Bn as main parameters. The study evaluates 54 different combinations of these parameters. The results indicate that in order to minimize the occurrence of cycle slips in the output phase of the PLL, the most appropriate tracking loop bandwidth Bn depends on the values of both S-4 and tau 0, which characterize the scintillation fading pattern. Simulations showed that as the S-4 index increases, the automatic increment in the PLL bandwidth may not be the best choice as the performance depends on the temporal characteristics of the scintillating signal. The analysis showed that, among the configurations tested, the equivalent noise bandwidth of 10 Hz achieved the best performance overall. The investigation also showed that choosing the wrong parameter regarding the PLL bandwidth may increase the probability of cycle slip by up to 10 times during fading events. (AU)

• Processo FAPESP: 17/50115-0 - INCT 2014: tecnologia GNSS no suporte à navegação aérea
• Beneficiário: Joao Francisco Galera Monico
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa em Políticas Públicas
• Processo FAPESP: 18/06158-9 - Estudos estatísticos da variação dos parâmetros ionosféricos e sua relação com eventos do clima espacial
• Beneficiário: Jonas de Sousa dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado