Research on An Improved PMF-FFT Fast PN Code Acquisition Algorithm

Ning-qing Liu, Bin Sun, Chun-meng Guan

Communication Research Center Harbin Institute of Technology Harbin, China.

DOI: 10.4236/cn.2013.53B2049                

Abstract

To solve the problem of the large Doppler frequency offset in the LEO communication system, this paper studies a rapid PN code acquisition method based on the PMF-FFT architecture, which searches the phase and frequency offset and at the same time reduces the acquisition time. It presents an improved method equivalent to windowing function and uses windowing process to overcome the attenuation of related peak envelope caused by partial matched filters.

Keywords

Doppler Frequency Offset; Rapid PN Code Acquisition Algorithm; PMF-FFT; Windowing

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	M. Sust, R. Kaufman, F. Molitor and A. Bjornstor, “Rapid Acquisition Concepts for Voice Activated CDMA Communication,” IEEE Globecom’ 90, 1990, pp. 1820-1828.
[2]	G. J. R. Povey and J. Talvitie, “Doppler Compensation and Code Acquisition Techniques for LEO Satellite Mobile Radio Communications. IEEE Fifth Internation Conference on Satellite Systems for Mobile Communications and Navigation. 1996, pp. 16-19. doi:10.1049/cp:19960398
[3]	R. A. Stirling-Gallacher, A. P. Hulbert and G. J. R. Povey, “A Fast Acquisition Technique for a Direct Sequence Spread Specrum Signal in the Presence of a Large Doppler Shift,” Proceedings of ISSSTA’96, Mainz, Germany. 1996, pp. 156-160.
[4]	S. M. Spangenberg, I. Scott, S. Mclaughlin and G. J. R. Povey, “An FFT-Based Approach for Fast Acquisition in Spread Spectrum Communication Systems,” Wireless Personal Communications, Vol. 13, No. 1-2, 2000, pp. 27-55. doi:10.1023/A:1008848916834
[5]	A. Polydoros and C. L. Weber, “A Unified Approach to Serial Search Spread-Spectrum Code Acquisition—Part II: A Matched Filter Receiver,” IEEE Transactions Communications, 1984, Vol. 32, No. 5, pp. 550-560. doi:10.1109/TCOM.1984.1096113