Observatorio de I+D+i UPM

Memorias de investigación
Ponencias en congresos:
Design and validation of a software receiver for Galileo
Áreas de investigación
  • Telecomunicación
"This paper presents a new concept of software-based GNSS receivers for the Binary Offset Carrier signals of the Galileo testbed satellites, Giove-A and Giove-B. The receiver designed in Matlab must be able to acquire, track and demodulate both signals. Its advantages in terms of flexibility and reconfigurability make it an excellent instrument to test new designs or new prototypes as a previous stage on a hardware implementation. Different techniques have been tried in the tracking and acquisition modules to determine which ones were more efficient and which had the best performance. In the acquisition process 3 techniques were studied: Serial Search, Parallel Frequency Space Search and Parallel Code Phase Search. Finally the Parallel Code Phase Search technique was selected because it performs the acquisition process with the smallest number of iterations with a consequent saving on the processing time required, and also because of his good parameters estimation resolution. For the tracking module, due to the particularities of the BOC signals of Galileo, the BOC-PRN scheme was selected for his ability to avoid ambiguity on the signal tracking proper of BOC signals. Also an offline signal generator able to generate the E1 signal from both satellites has been implemented for performance testing of the system. The generator is configurable so that the signal generated meets the characteristics required, such as: IF, Doppler shift and code offset for each channel and SNR. Different performance test were carried out to ensure that the receiver worked as it should. The first stage of this test was done with locally generated signals and the second and final stage was carried out with signal captures performed with a GNSS RF Front-end during different satellite passes from both Giove-A and Giove-B. The test results show that these signals can be successfully acquired with a narrowband front-end commonly used for GNSS systems utilizing conventional algorithms and it is proven that the data channel can be tracked with the implemented algorithms. Finally, a simulator with a graphical user interface named GAEDUNAV (Galileo Educational Navigation Tool) has been implemented to integrate and show in a friendly and simple way the software receiver developed."
Nombre congreso
61st International Astronautical Congress
Tipo de participación
Lugar del congreso
Prague, CZ
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Título de las actas
Actas del congreso
Esta actividad pertenece a memorias de investigación
  • Autor: Ramon Martinez Rodriguez-Osorio (UPM)
  • Participante: Roberto De Lezaeta Collazos (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Radiación
  • Departamento: Señales, Sistemas y Radiocomunicaciones
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