Design of Short Synchronization Codes for Use in Future GNSS System

The prolific growth in civilian GNSS market initiated the modernization of GPS and the GLONASS systems in addition to the potential deployment of Galileo and Compass GNSS system. The modernization efforts include numerous signal structure innovations to ensure better performances over legacy GNSS system. The adoption of secondary short synchronization codes is one among these innovations that play an important role in spectral separation, bit synchronization, and narrowband interference protection. In this paper, we present a short synchronization code design based on the optimization of judiciously selected performance criteria. The new synchronization codes were obtained for lengths up to 30 bits through exhaustive search and are characterized by optimal periodic correlation. More importantly, the presence of better synchronization codes over standardized GPS and Galileo codes corroborates the benefits and the need for short synchronization code design.

[1]  Jean-Luc Issler,et al.  A Software Receiver for GPS-IIF L5 Signal , 2002 .

[2]  Jean-Luc Issler,et al.  GPS L5 Receiver Implementation Issues , 2003 .

[3]  Joseph J. Rushanan,et al.  The Spreading and Overlay Codes for the L1C Signal , 2007 .

[4]  Per Enge,et al.  A Civil User Perspective on Near-Term and Long-Term GPS Modernization , 2004 .

[5]  S. Mertens.  Exhaustive search for low-autocorrelation binary sequences , 1996 .

[6]  Abraham Lempel,et al.  A class of balanced binary sequences with optimal autocorrelation properties , 1977, IEEE Trans. Inf. Theory.

[7]  Y. Jay Guo,et al.  Optimal sequences for channel estimation using discrete Fourier transform techniques , 1999, IEEE Trans. Commun..

[8]  J.J. Garcia,et al.  Using Golay complementary sequences for multi-mode ultrasonic operation , 1999, 1999 7th IEEE International Conference on Emerging Technologies and Factory Automation. Proceedings ETFA '99 (Cat. No.99TH8467).

[9]  L. Hofman,et al.  New pulse sequences with desirable correlation properties , 1971 .

[10]  M.B. Pursley,et al.  Crosscorrelation properties of pseudorandom and related sequences , 1980, Proceedings of the IEEE.

[11]  Khaled Ben Letaief,et al.  A robust timing and frequency synchronization for OFDM systems , 2003, IEEE Trans. Wirel. Commun..

[12]  Marcel J. E. Golay,et al.  Complementary series , 1961, IRE Trans. Inf. Theory.

[13]  John W. Betz,et al.  Overview of the GPS M Code Signal , 2000 .

[14]  Marcel J. E. Golay,et al.  The merit factor of long low autocorrelation binary sequences , 1982, IEEE Trans. Inf. Theory.

[15]  Jeremie Godet,et al.  Status of Galileo Frequency and Signal Design , 2002 .

[16]  Michael Tran,et al.  Receiver Algorithms for the New Civil GPS Signals , 2002 .

[17]  Initial Observations and analysis of Compass meO Satellite Signals , .

[18]  S. Budisin.  Efficient pulse compressor for Golay complementary sequences , 1991 .

[19]  Dieter Jungnickel,et al.  Perfect and Almost Perfect Sequences , 1999, Discret. Appl. Math..

[20]  Henry Leung,et al.  Chaotic binary sequences for efficient wireless multipath channel estimation , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[21]  James L. Massey,et al.  Optimum sequence multisets for synchronous code-division multiple-access channels , 1994, IEEE Trans. Inf. Theory.