An improved reduced-rank STAP interference suppression method in design of GNSS receivers

In this paper, we address the problem of interference cancellation in global positioning system (GPS) receiver using an adaptive reduced-rank space-time adaptive processing (STAP) interference suppression method based on multistage nested Wiener filter (MSNWF). This improved adaptive reduced-rank method is based on the improved Gerschgorin radii algorithm. First, the cross-correlations between the desired signals of the adjacent stages of MSNWF are directly used to calculate the Gerschgorin radii instead of employing the eigenvalue decomposition of the covariance matrix. Then, a heuristic decision rule based on Gerschgorin disk estimator (GDE) is employed to estimate the rank of interference subspace. Thus optimal rank can be adaptively selected without increasing the computation. Analysis and results of the experiment show that the proposed method further reduces the computation of STAP and enhances its real-time property with the interference suppression performance unaffected.

[1]  Michael D. Zoltowski,et al.  Anti-jam space-time preprocessor for GPS based on multistage nested Wiener filter , 1999, MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341).

[2]  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).

[3]  Per K. Enge,et al.  Global positioning system: signals, measurements, and performance [Book Review] , 2002, IEEE Aerospace and Electronic Systems Magazine.

[4]  Michael D. Zoltowski,et al.  Low-sample performance of reduced-rank power minimization based jammer suppression for GPS , 2000, 2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536).

[5]  Michael L. Honig,et al.  Adaptive reduced-rank interference suppression based on the multistage Wiener filter , 2002, IEEE Trans. Commun..

[6]  Lei Huang,et al.  MMSE-Based MDL Method for Robust Estimation of Number of Sources Without Eigendecomposition , 2009, IEEE Transactions on Signal Processing.

[7]  Hsien-Tsai Wu,et al.  Source number estimators using transformed Gerschgorin radii , 1995, IEEE Trans. Signal Process..

[8]  Michael D. Zoltowski,et al.  Exploiting conjugate symmetry in power minimization based pre-processing for GPS: reduced complexity and smoothness , 2000, 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100).

[9]  P.T. Capozza,et al.  A single-chip narrow-band frequency-domain excisor for a Global Positioning System (GPS) receiver , 1999, IEEE Journal of Solid-State Circuits.

[10]  R.A. Iltis,et al.  GPS C/A code tracking with adaptive beamforming and jammer nulling , 2002, Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002..

[11]  Mohamed Sahmoudi,et al.  Robust tracking of weak GPS signals in multipath and jamming environments , 2009, Signal Process..

[12]  R.A. Iltis,et al.  STAP for GPS receiver synchronization , 2004, IEEE Transactions on Aerospace and Electronic Systems.

[13]  Michael D. Zoltowski,et al.  GPS jammer suppression with low-sample support using reduced-rank power minimization , 2000, Proceedings of the Tenth IEEE Workshop on Statistical Signal and Array Processing (Cat. No.00TH8496).

[14]  J. S. Goldstein,et al.  Subspace selection for partially adaptive sensor array processing , 1997, IEEE Transactions on Aerospace and Electronic Systems.

[15]  Michael L. Honig,et al.  Performance of reduced-rank linear interference suppression , 2001, IEEE Trans. Inf. Theory.

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

[17]  J. Scott Goldstein,et al.  Reduced-rank adaptive filtering , 1997, IEEE Trans. Signal Process..

[18]  Louis L. Scharf,et al.  A Multistage Representation of the Wiener Filter Based on Orthogonal Projections , 1998, IEEE Trans. Inf. Theory.

[20]  Rong Wang,et al.  Interference cancellation in GPS receiver using noise subspace tracking algorithm , 2011, Signal Process..

[21]  Joseph R. Guerci,et al.  Optimal and adaptive reduced-rank STAP , 2000, IEEE Trans. Aerosp. Electron. Syst..