An FFT-Based Approach for Carrier Frequency Domain Acquisition in Spread Spectrum TT&C System

Abstract:

Acquisition time of precision ranging code is long under the conditions of large Doppler shift, the carrier frequency domain FFT-based fast acquisition theory was analyzed, and the method of carrier Doppler compensation estimates to complete the PN code Doppler compensation was directly used in spread spectrum ranging signal acquisition. Comparing with the traditional parallel acquisition approach, the Doppler frequency estimation accuracy and acquisition speed is greatly improved, the acquisition time is shorter than long code segment with the traditional parallel acquisition method. Comparing with the method of short code supporting for long code, the channel energy is saved.

• Periodical: Applied Mechanics and Materials (Volumes 135-136)
• Pages: 211-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.135-136.211
• Online since: October 2011
• Authors: Xing Cun Wu, Ping Gong, Hai Jun Song, Hui Zhi Zou
• Keywords: Fast Acquisition, FFT, Precision Ranging Code, Spread Spectrum TT and C System

References

[1] WU You-xing, FANG Xin-bing, CONG Bo, et al., The Problem of Exceptional Non-coherent PN Ranging Data in Spread Spectrum TT&C Systems: Analysis and Solution,. Telecommunication engineering, 2008, vol. 48, pp.56-57.

[2] D J R VAN NEE, A J R M COENEN, New Fast GPS Code Acquisition Technique Using FFT,. Electronic Letters, 1991, vol 27, pp.158-160.

DOI: 10.1049/el:19910102

[3] P.M. Grant, S. M. Spangerberg, I. Scott, et al., Doppler estimation for fast acquisition in spread spectrum communication system,. IEEE ISSSTA, Sun City, January 1998, pp.542-560.

[4] Candida L S, Sascha M S, Gordon J R P, A serial-parallel FFT corelator for PN code acquisition from LEO satellites,. IEEE SSSTA, Sun city, South Africa, November 1998, pp.446-448.

[5] SPANGENBERG S M，SCOTT I, MCLAuGHLIN S, et a1., An FFT-based approach for fast acquisition in spread spectrum communicatjon systems, Wireless Personal Communications 13, 2000, pp.27-56.

[6] HU Guang-shu, Digital Signal Processing Theory Algorithm and Implementation,. Beijing: Tsinghua University Press. 2003, pp.133-138.

[7] Sascha M S, Gordon J R P, Code acquisition for LEO satellite mobile communication using a serial-parallel correlator with FFT for Doppler stimation,. IEEE Trans on vehicular technology, 2001, vol 50, pp.1549-1567.

[8] XU Bin, CUI Yong, WANG Chuan-xin, et al., Research on improved fast acquisition method based on FFT of high dynam ic direct spread spectrum signal,. Foreign Electronic Measurement Technology 2009, vol 28, pp.17-20.

[9] Yang C, Vasouez J, Chaffee J, Fast Direct P(Y)-Code Acquisition Using XFAST, /Proc．of ION GPS．Nash-ville, 1999, pp.1157-1167.