STAP for GPS receiver synchronization

A space-time adaptive processing (STAP) algorithm for delay tracking and acquisition of the GPS signature sequence with interference rejection capability is developed. The interference can consist of both broadband and narrowband jammers, and is mitigated in two steps. The narrowband jammers are modelled as vector autoregressive (VAR) processes and rejected by temporal whitening. The spatial nulling is implicitly achieved by estimating a sample covariance matrix and feeding its inverse into the extended Kalman filter (EKF). The EKF estimates of the code delay and the fading channel are used for a t-test for acquisition detection. Computer simulations demonstrate robust performance of the algorithm in severe jamming, and also show that the algorithm outperforms the conventional delay-locked loop (DLL).

[1]  B. E. Bona,et al.  Optimum Reset of Ship's Inertial Navigation System , 1966, IEEE Transactions on Aerospace and Electronic Systems.

[2]  Andreas Polydoros,et al.  A Unified Approach to Serial Search Spread-Spectrum Code Acquisition - Part I: General Theory , 1984, IEEE Transactions on Communications.

[3]  Rodger E. Ziemer,et al.  Digital Communications and Spread Spectrum Systems , 1985 .

[4]  Upamanyu Madhow,et al.  MMSE interference suppression for direct-sequence spread-spectrum CDMA , 1994, IEEE Trans. Commun..

[5]  Carl W. Helstrom,et al.  Elements of signal detection and estimation , 1994 .

[6]  Ronald A. Iltis.  An EKF-based joint estimator for interference, multipath, and code delay in a DS spread-spectrum receiver , 1994, IEEE Trans. Commun..

[7]  D. J. Allerton,et al.  Book Review: GPS theory and practice. Second Edition, HOFFMANNWELLENHOFF B., LICHTENEGGER H. and COLLINS J., 1993, 326 pp., Springer, £31.00 pb, ISBN 3-211-82477-4 , 1995 .

[8]  Scott L. Miller.  An adaptive direct-sequence code-division multiple-access receiver for multiuser interference rejection , 1995, IEEE Trans. Commun..

[9]  Michael D. Zoltowski,et al.  Advanced adaptive null steering concepts for GPS , 1995, Proceedings of MILCOM '95.

[10]  Petros G. Voulgaris,et al.  On optimal ℓ∞ to ℓ∞ filtering , 1995, Autom..

[11]  Bradford W. Parkinson,et al.  Global positioning system : theory and applications , 1996 .

[12]  Behnaam Aazhang,et al.  Subspace-based channel estimation for code division multiple access communication systems , 1996, IEEE Trans. Commun..

[13]  Ronald A. Iltis.  Demodulation and code acquisition using decorrelator detectors for QS-CDMA , 1996, IEEE Trans. Commun..

[14]  A. Duel-Hallen,et al.  On the performance of coherent and noncoherent multiuser detectors for mobile radio CDMA channels , 1996, Proceedings of ICUPC - 5th International Conference on Universal Personal Communications.

[15]  Ramon Agustí Comes,et al.  A Novel EKF-Based Recovery in DS Scheme for DS/CDMA Systems Tracking Code Delay , 1997 .

[16]  Michael J. Rycroft,et al.  Understanding GPS. Principles and Applications , 1997 .

[17]  Lars K. Rasmussen,et al.  Adaptive symbol and parameter estimation in asynchronous multiuser CDMA detectors , 1997, IEEE Trans. Commun..

[18]  R. L. Fante,et al.  Cancellation of jammers and jammer multipath in a GPS receiver , 1998, IEEE 1998 Position Location and Navigation Symposium (Cat. No.98CH36153).

[19]  P. Stoica,et al.  Maximum likelihood methods in radar array signal processing , 1998, Proc. IEEE.

[20]  Sergio Verdu,et al.  Multiuser Detection , 1998 .

[21]  Bernard Fino,et al.  Multiuser detection: , 1999, Ann. des Télécommunications.

[22]  Michael S. Braasch,et al.  GPS receiver architectures and measurements , 1999, Proc. IEEE.

[23]  Ronald A. Iltis,et al.  C/A Code Tracking and Acquisition with Interference Rejection using the Extended Kalman Filter , 1999 .

[24]  A. J. V. Dierendonck.  GPS Receiver Architectures and Measurements - Proceedings of the IEEE , 1999 .

[25]  John J. Vaccaro,et al.  Wideband cancellation of interference in a GPS receive array , 2000, IEEE Trans. Aerosp. Electron. Syst..

[26]  J. J. Vaccaro,et al.  Comparison of narrowband adaptive filter technologies for GPS , 2000, IEEE 2000. Position Location and Navigation Symposium (Cat. No.00CH37062).

[27]  Qingwen Zhang,et al.  Parametric adaptive matched filter for airborne radar applications , 2000, IEEE Trans. Aerosp. Electron. Syst..

[28]  Michael D. Zoltowski,et al.  Low complexity anti-jam space-time processing for GPS , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[29]  A. Lee Swindlehurst,et al.  A parametric approach to hot clutter cancellation , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[30]  Xiaoli Yu,et al.  Code timing acquisition using an antenna array for asynchronous DS-CDMA systems in a near-far environment , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[31]  James S. Lehnert,et al.  DS-CDMA system with joint channel estimation and MAP detection in time-selective fading channels , 2001, IEEE J. Sel. Areas Commun..

[32]  John B. Moore,et al.  Direct Kalman filtering approach for GPS/INS integration , 2002 .

[33]  R. A. Iltis,et al.  Performance Comparison of Particle and Extended Kalman Filter Algorithms for GPS C/A Code Tracking and Interference Rejection 1 , 2002 .

[34]  Ramon,et al.  A Novel EKF-Based Scheme for Tracking Code Delay Recovery in DS / CDMA Systems , .