Abstract
The Galileo E5a/E5b signals and the Global Positioning System (GPS) L5 signal lie within the aeronautical radionavigation services (ARNS) band. They suffer interference from the services in this frequency band, in particular, pulsed signals from distance measuring equipment (DME) and tactical air navigation (TACAN) systems. To maintain system accuracy and integrity, interference mitigation is beneficial and necessary. We first present the real DME/TACAN environment at Stanford, CA as an example to illustrate the need for mitigating DME/TACAN interference. We then propose a time and frequency joint mitigation algorithm—Hybrid Blanking and its simplified version, frequency domain adaptive filtering (FDAF) for hardware implementation. Finally, a flight measurements campaign was performed over a European DME/TACAN hotspot near Frankfurt, Germany, to record a worst-case DME interference environment. Recorded data from the flight tests mixed with injected GNSS signals verify the effectiveness of the proposed mitigation algorithm.
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References
Amoroso F (1983) Adaptive AID converter to suppress CW interference in DSPN spread-spectrum communications, IEEE Trans Commun, Com-31(10)
Amoroso F (1986) Performance of the adaptive A/D converter in combined CW and gaussian interference, IEEE Trans Commun, Com-34(3)
Bastide F, Chatre E, Macabiau C, Roturier B (2004) GPS L5 and galileo E5a/E5b signal-to-noise density ratio degradation due to DME/TACAN signals: simulation and theoretical derivation. ION NTM Conference, San Diego, CA
Denks H, Hornbostel A, Perré J-M (2008) GNSS receiver testing focusing on strong interference by use of a hardware signal simulator, In: Proceedings of ION 08, Savannah GA
Denks H, Hornbostel A, Chopard V (2009) GNSS receiver testing by hardware simulation in an standardized pulsed and CW interference environment. In: Proceedings of ENC GNSS, Naples, 2009
EUROCAE (1987) Minimum operational performances requirements for distance measuring equipment (DME/N and DME/P) Interrogators Operating Within the RF Range 960 to 1215 MHz (airborne equipment) EUROCAE ED-84
EUROCAE (2007) Interim minimum operational performance specification for airborne Galileo satellite receiving equipment, vs. 0.25
European Commission (2009) www.anastasia-fp6.org
Gao GX (2007) DME/TACAN interference and its mitigation in L5/E5 bands, ION global navigation satellite systems conference 2007. Fort Worth, Texas
Gao GX, De Lorenzo D, Chen A, Lo S, Akos D, Walter T, Enge P (2007) Galileo GIOVE-A broadcast E5 codes and their application to acquisition and tracking. ION NTM Conference, San Diego, CA
Kayton M, Fried W (1997) Avionics navigation systems, 2nd edn. Wiley, New York
Kim T, Grabowski J (2003) Validation of GPS L5 Coexistence with DME/TACAN and Link-16 System ION GNSS conference, Portland, OR
Krishnamurthy V, Logothetis A (1999) Adaptive nonlinear filters for narrow-band interference suppression in spread-spectrum CDMA systems, IEEE Trans Commun, 47(5)
Parkinson B, Spilker JJ (1996) global positioning system: theory and applications, vol I, AIAA, 1st edn
RTCA DO-292 (2004) Assessment of radio frequency interference relevant to the GNSS L5/E5A frequency band
Soderstrand, M, Johnson, TG, Strandberg RH, Loomis HH, Rangarao KV (1997) Suppression of multiple narrow-band interference using real-time adaptive notch filters, IEEE Trans Circuits Syst II: Analog and Digit Signal Process, 44(3)
Soderstrand M, Johnson L, Phillips S, Steven R (2006) New technique for attenuation of narrow-band interference with applications in control and communications systems. Fortieth Asilomar Conference on Signals, Systems and Computers
Steingass A, Hornbostel A, Denks H (2009) Airborne measurements of DME interferers at the European hotspot, In: Proceedings of ENC GNSS, Naples
Symons F (1978) Narrow-band interference rejection using the complex linear prediction filter’, IEEE Trans Acoust Speech Signal Process, 26(1)
Wang Y-C, Milstein LB (1988) Rejection of multiple narrow-band interference in both BPSK and QPSK DS spread-spectrum systems, IEEE Trans Commun, 36(2)
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This work was supported in part by the US Federal Aviation Administration under Grant—G-007 and by the European Commission.
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Gao, G.X., Heng, L., Hornbostel, A. et al. DME/TACAN interference mitigation for GNSS: algorithms and flight test results. GPS Solut 17, 561–573 (2013). https://doi.org/10.1007/s10291-012-0301-9
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DOI: https://doi.org/10.1007/s10291-012-0301-9