The development and implementation of Communication, Navigation, Surveillance, and Air Traffic Management (CNS/ATM) for civil aviation have attracted a lot of attentions, because CNS/ATM changes the current analog aviation system to the modern digital aviation system. As the enabling technology of the modern CNS/ATM system, the Global Positioning System (GPS), for example, is utilized for time synchronization between air data network, air communication network, and aircraft navigation for approach and landing. If GPS experiences intentional or unintentional interference, there would be a significant impact on the normal operation of the CNS/ATM. Therefore, the United States 2010 Federal Radionavigation Plan and the Federal Aviation Administration (FAA) Next Generation Air Transportation System (NextGen) clearly indicates that an Alternative Position, Navigation and Timing (APNT) system should be developed to maintain CNS/ATM operations for the periods with GPS outages. The objective of this work is thus to research and develop a Wide Area Multilateration (WAM) evaluation test bed which could provide the navigation information for civil aviation users during severe GPS failure and outage. In this work, the Time Difference of Arrival (TDOA) method is used as our positioning algorithm, and the signal of opportunity under consideration is the ADS-B radio link. The ADS-B radio link is used for this work because no construction for new ADS-B infrastructure is needed. However, there are two ADS-B radio standards, namely the ADS-B Mode S (1090 MHz) and UAT (978 MHz). It is important that the receiver be reconfigurable to some flexibility to accommodate the two standards for research and development needs. Thus, the software defined radio (SDR) approach is used to develop an ADS-B SDR on a Universal Software Radio Peripheral (USRP) Detailed discussions on the configuration of the external hardware setup in order to form a WAM evaluation test bed are given in the paper, for instance, the time synchronization scheme for all experimental equipment Depending on context, different signal processing parameters are required. The performance is evaluated with respect to the different parameters to demonstrate the flexibility of the developed system. Finally, the proposed. WAM evaluation test bed using USRP based ADS-B receiver is tested with real world data.
|出版狀態||Published - 2013 一月 1|
|事件||26th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2013 - Nashville, TN, United States|
持續時間: 2013 九月 16 → 2013 九月 20
|Other||26th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2013|
|期間||13-09-16 → 13-09-20|
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