Extracting Ionosphere Scintillations Index Based on Single Frequency GPS Software Receiver

Abstract:

Scintillations are caused by ionospheric plasma-density irregularities and can lead to signal power fading, loss of lock of the carrier tracking loop in the GPS receiver. The traditional method of monitoring and mitigating scintillation is to transform commercial GPS receiver with modified hardware and embedded software. To better facilitate advance development GPS receiver under different condition, GPS software scintillation receiver is designed in this paper. The hardware scheme of high-speed GPS signal acquisition system is first discussed and implemented with FPGA and DSP architecture. Then, we describe receiver software processing algorithm, particularly the portion involving the scintillation signal acquisition and tracking, ionospheric scintillation index extracting and scintillation monitoring. The performance of software receiver is demonstrated under scintillation conditions. Relevant results show that software-receiver based approach can avoid weak signal loss and extract effectively ionospheric scintillation parameter compared with the traditional extracting method. Software receiver is suitable and reliable for the ionospheric scintillations monitoring, and can provide theoretical foundations and experimental preparations for future scintillation studies implemented with Chinese indigenous BeiDou-Ⅱ navigation and poisoning system.

• Periodical: Applied Mechanics and Materials (Volumes 190-191)
• Pages: 1136-1143
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.190-191.1136
• Online since: July 2012
• Authors: Zhi Huang, Hong Yuan, Qi Yao Zuo
• Keywords: Acquisition, Ionospheric Scintillation, Monitoring, Soft Receiver, Tracking

References

[1] K. M. Groves, S. Basu, E. J. Weber, et al, Equatorial Scintillation and Systems Support, Radio Science, 1997, Vol. 32, No. 5: 2047-2064, doi: 10. 1029/ 97 RS 00836.

[2] D. Liu, J. Feng, Z. X. Deng, Ionospheric Scintillation Effects on GPS Positioning Performance, Chinese Journal of Radio Science, 2010, Vol. 25, No. 4: 702-210.

[3] S. P. Shang, J. K. Shi, J. S. Guo, et al., Scintillation Monitoring and Preliminary Statistic Analysis Over Hainan Region, Chinese Journal of Space Science, 2005, 25(1): 23-28.

DOI: 10.11728/cjss2005.01.023

[4] P. V. S. Rama Rao, P. T. Jayachandran, P. Sri Ram, et al., Characteristics of VHF Radiowave Scintillations over a Solar Cycle (1983-1993) at a Low-latitude Station, Ann. Geophysical 2007, 15, 729-733.

DOI: 10.1007/s00585-997-0729-3

[5] A. J. Van Dierendonck, John, Klobuchar, Quyen Hua, et al, Ionosphere Scintillation Monitoring Using Commercial Single Frequency C/A Code Receivers. Proceeding of ion GPS-93, Salt Lake City, UT, September 1993, 1333-1342.

[6] G. Z. Li, B. Q. Ning, H. Yuan, Design and Realization of Real Time GPS Scintillation Monitoring System, Chinese Journal of Radio Science, 2005, 20(6): 758-763.

[7] L. Cai, J. S. Xu, F. Yin, et al., Development of an L-band Ionospheric Scintillation and TEC Monitor, Chinese Journal of Radio Science, 2008, Vol. 23 No. 4: 717-721.

[8] Suman Ganguly, Aleksandar Jovancevic, Andrew Brown, et al., Ionospheric Scintillation Monitoring and Mitigation Using a Software GPS Receiver, Radio Science, 2004, Vol. 39, RS1S21, doi: 10. 1029/2002RS002812.

DOI: 10.1029/2002rs002812

[9] C. Ma, G. Lachapelle, M. E. Cannon, Implementation of a Software GPS Receiver. Proceedings of ION GNSS, Long Beach, CA, September 2004, 956-970.

[10] N. Sonowal, R. Yadav, S. Kannan, Real Time GPS Software Receiver with New Fast Signal Tracking Method, radio and wireless symposium, IEEE, Orlando, FL, 2008, 231-234.

DOI: 10.1109/rws.2008.4463471

[11] X. X. Tan, C. D. Han, Y. K. Xie, Sensitive Fast Acquisition Algorithm Suitable to Implement in Software GPS Receiver, Acta Electronica Sinica, 2010, Vol. 38, No. 1: 99-104.

[12] B. M. Ledvina, , M. L. Psiaki, S. P. Powell, et al., Bit-wise Parallel Algorithms for Efficient Software Correlation Applied to a GPS Software Receiver. IEEE Transactions on wireless Communications, September 2004, 3(5): 1469-1473.

DOI: 10.1109/twc.2004.833467

[13] D. Akopian, Fast FFT Based GPS Satellite Acquisition Methods. IEEE Proceedings Radar Sonar & Navigation. 2005, 152(4): 277-286.

DOI: 10.1049/ip-rsn:20045096

[14] J. T. Zhang, Y. Y. Wang, High-speed Data Acquisition System Based on FPGA and USB 2. 0, Instrument Technique and Sensor, 2011, 10: 46-48.

[15] B. F. Zhang, Y Wang, J. C. Zhu, Design of High Speed Data Acquisition System Based on FPGA and DSP, Artificial Intelligence and Education (ICAIE), Hang Zhou, 2010, 132 - 135.

DOI: 10.1109/icaie.2010.5641136

[16] Mark L. Psiaki, Block Acquisition of Weak GPS Signals in a Software Receiver. ION GPS 2001, 11-14 September 2001, Salt Lake City, UT, 1-13.

[17] Y. C. Ming, T. F. Kai, Adaptive GPS Acquisition Technique in Weak Signal Environment. Vehicular Technology Conference, Melbourne, Vic, spring. IEEE 63rd 2006, 2612-2616.

DOI: 10.1109/vetecs.2006.1683340

[18] C. L. Ning, H. L. Shi, C. Hu, GPS/CAPS Dual-model Receiver. Science in China (Series G: Physics, Mechanics & Astronomy, 2008, 38 (12): 1802-1811.