Filter-Bank-Based Narrowband Interference Detection and Suppression in Spread Spectrum Systems

A filter-bank-based narrowband interference detection and suppression method is developed and its performance is studied in a spread spectrum system. The use of an efficient, complex, critically decimated perfect reconstruction filter bank with a highly selective subband filter prototype, in combination with a newly developed excision algorithm, offers a solution with efficient implementation and performance close to the theoretical limit derived as a function of the filter bank stopband attenuation. Also methods to cope with the transient effects in case of frequency hopping interference are developed and the resulting performance shows only minor degradation in comparison to the stationary case.

[1]  N.G. Kingsbury,et al.  Frequency-domain motion estimation using a complex lapped transform , 1993, IEEE Trans. Image Process..

[2]  Tanja Karp,et al.  Modified DFT filter banks with perfect reconstruction , 1999 .

[3]  L. Milstein,et al.  Performance Analysis of Narrow-Band Interference Rejection Techniques in DS Spread-Spectrum Systems , 1984, IEEE Trans. Commun..

[4]  D. Munson.  Circuits and systems , 1982, Proceedings of the IEEE.

[5]  Gary J. Saulnier,et al.  Narrow-band interference excision in spread spectrum systems using lapped transforms , 1997, IEEE Trans. Commun..

[6]  L. B. Milstein,et al.  Interference rejection techniques in spread spectrum communications , 1988, Proc. IEEE.

[7]  Ari Pouttu,et al.  Performance of PIE interference suppressor using FFT, DCT and ELT transformations in FH/DS communications , 2000, IEEE/AFCEA EUROCOMM 2000. Information Systems for Enhanced Public Safety and Security (Cat. No.00EX405).

[8]  Ali N. Akansu,et al.  Adaptive subband transforms in time-frequency excisers for DSSS communications systems , 1995, IEEE Trans. Signal Process..

[9]  Harri Saarnisaari,et al.  Interference suppression in DS/FH system using modified two sided adaptive filter , 2001, 2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277).

[10]  F. Hsu,et al.  Digital Whitening Techniques for Improving Spread Spectrum Communications Performance in the Presence of Narrowband Jamming and Interference , 1978, IEEE Trans. Commun..

[11]  Henrique S. Malvar.  A modulated complex lapped transform and its applications to audio processing , 1999, 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258).

[12]  Ali N. Akansu,et al.  Wavelet, Subband, and Block Transforms in Communications and Multimedia , 1999 .

[13]  John G. Proakis,et al.  Adaptive Algorithms for Estimating and Suppressing Narrow-Band Interference in PN Spread-Spectrum Systems , 1982, IEEE Trans. Commun..

[14]  Henrique S. Malvar,et al.  Signal processing with lapped transforms , 1992 .

[15]  R.C. Johnson,et al.  Introduction to adaptive arrays , 1982, Proceedings of the IEEE.

[16]  Markku Renfors,et al.  Efficient implementation of complex exponentially-modulated filter banks , 2003, Proceedings of the 2003 International Symposium on Circuits and Systems, 2003. ISCAS '03..

[17]  T. J. Kumpumaki,et al.  Narrow-band interference rejection using transform domain signal processing in a hybrid DS/FH spread-spectrum system , 1997, MILCOM 97 MILCOM 97 Proceedings.

[18]  Markku Renfors,et al.  Implementation of parallel cosine and sine modulated filter banks for equalized transmultiplexer systems , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[19]  M. Renfors,et al.  Filter bank based narrowband interference detection and suppression in spread spectrum systems , 2002, 2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353).

[20]  Markku Renfors,et al.  Complex modulated critically sampled filter banks based on cosine and sine modulation , 2002, 2002 IEEE International Symposium on Circuits and Systems. Proceedings (Cat. No.02CH37353).

[21]  Ari Pouttu,et al.  Adaptive transform domain interference suppression in a hybrid DS/FH-system , 1998, 1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333).