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|Title:||Assessment of DVB-T Impact on GNSS Acquisition and Tracking Performance|
|Authors:||FORTUNY GUASCH Joaquim; BORIO DANIELE; WILDEMEERSCH Matthias|
|Citation:||Proceedings of the 2011 International Technical Meeting of The Institute of Navigation p. 347 - 356|
|Publisher:||Institute of Navigation|
|Type:||Contributions to Conferences|
|Abstract:||Due to the long satellite-receiver distance, the received Global Navigation Satellite System (GNSS) signal power is extremely low. Hence, GNSS is highly vulnerable to a wide variety of interfering signals ¿ intentional or unintentional - falling within the GNSS frequency bands. Critical infrastructures rely heavily on GNSS in the field of navigation and timing, for instance in telecommunications, banking, power supply, aircraft guidance, tracking of dangerous goods, electronic tolling, etc. Due to the expansion of wireless services and their corresponding harmonics and intermodulation products, together with the concerns about intentional interference, there is a clear need to detect RF interference and to monitor the signal and service quality in different interference environments. The objective of this work is to evaluate the impact of DVB-T (Digital Video Broadcasting - Terrestrial) transmission in the near vicinity of GPS L1 C/A and Galileo E1 OS receivers. Digital Terrestrial Television (DTT) can be characterized by a reduced use of spectrum and a higher capacity with respect to its analogue counterpart. There are several competing DTT standards and the prevalent technology in Europe is DVB-T. This broadcast transmission standard for digital terrestrial television can be received by stationary portable and mobile receivers. DVB-T uses Coded Orthogonal Frequency Division Multiplexing (COFDM) that consists of 6817 or 1705 carriers in the 8K and 2K mode respectively. The technology makes use of different modulations (QPSK, 16-QAM and 64-QAM), different code rates and uses VHF 8 MHz or UHF 7 MHz channels. In the past, several cases of RF interference originating from DVB-T have been experienced and have been reported in literature. However, this type of interference on GNSS has not been fully addressed.|
|JRC Institute:||Institute for the Protection and Security of the Citizen|
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