Global Positioning System (GPS) is an excellent application example of satellite communication technology. And it is widely used in navigation, measurement, and time service. However, GPS receivers are vulnerable to unintentional interference or jamming because they rely on external radio frequency (RF) signals. RF interference signals can result in degraded navigation accuracy or complete loss of receiver tracking. Thus, GPS receivers have anti-jamming ability to relieve the effect of interference or jamming. In order to improve the anti-jamming performance of GPS receiver, it is of great theoretical significance and practical application value to study the influence of interference on GPS receiver. To this end, this paper investigates the performance of integrator in the presence of single-tone interference in GPS receiver, and a single-tone interference method based on frequency difference is proposed. Specifically, the analytical relationship between single-tone interference and integrator output is given. Then, it shows that the output of integrator depends not only on the power of single-tone interference but also on the frequency difference between single-tone interference and GPS signal. Finally, the vulnerability of integrator or GPS receiver to the presence of interference increases if the frequency difference satisfies the specific condition. Simulation results show that the proposed method is able to improve the chip error rate in GPS receiver.
2. Bek, M. K., E. M. Shaheen, and S. A. Elgamel, "Mathematical analyses of pulse interference signal on post-correlation carrier-to-noise ratio for the global positioning system receivers," IET Radar Sonar and Navigation, Vol. 9, No. 3, 266-275, 2014.
3. Morabito, A. F., R. Palmeri, and T. Isernia, "A compressive-sensing-inspired procedure for array antenna diagnostics by a small number of phaseless measurements," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 7, 3260-3265, 2016.
4. Ye, F., H. Tian, and F. Che, "CW interference effects on the performance of GPS receivers," Progress In Electromagnetics Research Symposium - Fall, IEEE, 2018.
5. Bek, M. K., S. A. Elgamel, and E. M. Shaheen, "Analysis of the global position system acquisition process in the presence of interference," IET Radar, Sonar and Navigation, Vol. 10, No. 5, 850-861, 2016.
6. Jang, J., M. Paonni, and B. Eissfeller, "CW interference effects on tracking performance of GNSS receivers," IEEE Transactions on Aerospace Electronic Systems, Vol. 48, No. 1, 243-258, 2012.
7. Shen, L., F. Chen, and S. Li, "Performance of coherent delay lock loop in the presence of CW interference and additive noise,", Vol. 1, 236-242, 2006.
8. Chang, Y. and W. Lindsey, "Phase-locked loop performance in the presence of CW interference and additive noise," IEEE Transactions on Communications, Vol. 30, No. 10, 2305-2311, 2003.
9. Karsi, M. F. and W. C. Lindsey, "Effects of CW interference on phase-locked loop performance," IEEE Transactions on Communications, Vol. 48, No. 5, 886-896, 2000.
10. Balaei, A. T., J. Barnes, and A. G. Dempster, "Characterization of interference effects on GPS signal carrier phase error,", 2005.
11. Li, X. Z., et al., "Performance research and simulation on DSSS system with short spreading code against single frequency," International Conference on Wireless Communications, IEEE Press, 2009.
12. Li, H., et al., "Performance of the direct sequence spread spectrum system with single-tone jamming," IEEE International Conference on Information Theory and Information Security, IEEE, 2010.
13. Milstein, L. B., S. Davidovici, and D. L. Schilling, "The effect of multiple-tone interfering signals on a direct sequence spread spectrum communication system," IEEE Transactions on Communications, Vol. 30, No. 3, 436-446, 2003.