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Kalman Filtering Of Narrowband Interference From Direct Sequence Spread Spectrum Communications Systems Microform
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Author :Brian William Kozminchuk Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 : Total Pages :476 pages Book Rating :4.:/5 (29 download)
Book Synopsis Kalman Filtering of Narrowband Interference from Direct-sequence Spread-spectrum Communications Systems [microform] by : Brian William Kozminchuk
Download or read book Kalman Filtering of Narrowband Interference from Direct-sequence Spread-spectrum Communications Systems [microform] written by Brian William Kozminchuk and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1992 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kalman Filtering of Narrowband Interference from Direct Sequence Spread Spectrum Communications Systems by : Brian William Kozminchuk
Download or read book Kalman Filtering of Narrowband Interference from Direct Sequence Spread Spectrum Communications Systems written by Brian William Kozminchuk and published by . This book was released on 1992 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Kalman Filter-Based Architectures for Interference Excision by :
Download or read book Kalman Filter-Based Architectures for Interference Excision written by and published by . This book was released on 1991 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents a novel Kalman filtering approach to the suppression of narrowband interference from direct sequence spread spectrum communications systems. The algorithm is based on the digital phase-locked loop Kalman filter. Because the interference is assumed to be much stronger than either the signal or noise, the Kalman filter locks onto a function related to the interference. The net result is an estimate of the phase of the interference and its amplitude. The algorithm is characterized through computer simulation for the case of narrowband Gaussian noise interference. Examples of the phase- and envelope-tracking capabilities of the algorithm are presented, followed by bit error rate curves for interference bandwidths ranging from 0.5% to 5.0% of the chip rate of the spread spectrum signal. The report concludes with three adaptive architectures.-The first is suitable for constant envelope interference; the second is a more general structure; and the third incorporate a decision-feedback structure accompanied with a training sequence.
Book Synopsis Theoretical Bit Error Rate Performance of the Kalman Filter Excisor for FM Interference by :
Download or read book Theoretical Bit Error Rate Performance of the Kalman Filter Excisor for FM Interference written by and published by . This book was released on 1992 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical report develops a theoretical bit error rate expression for a Kalman filtering technique that is used for filtering narrowband interferers out of direct sequence spread spectrum signals. The approach is based on the digital phase-locked loop Kalman filter and is close to optimum in so far as demodulating an FM-type of interferer. Because the interference is assumed to be much stronger than either the signal or noise, the Kalman filter locks onto the interference and produces estimates of its phase and envelope. Several assumptions are made in the development of the theoretical bit error rate expression and these are expanded upon. It is shown and illustrated that theory agrees well with simulation as long as the bandwidth of the low pass filter used to determine the envelope of the interference is much less than the sampling rate, otherwise the interference estimate at the input to the interference canceller will have significant cross-correlation with the signal, leading to some cancellation of the spread spectrum signal.
Book Synopsis Narrowband Interference Rejection in Direct-sequence Spread-spectrum Systems Using Time Domain Adaptive Filters by : Cheryl L. Stutzmann
Download or read book Narrowband Interference Rejection in Direct-sequence Spread-spectrum Systems Using Time Domain Adaptive Filters written by Cheryl L. Stutzmann and published by . This book was released on 1998 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Filtering of Direct-sequence Spread Spectrum Systems with Frequency-hop Interference by : John Keelan Grosspietsch
Download or read book Filtering of Direct-sequence Spread Spectrum Systems with Frequency-hop Interference written by John Keelan Grosspietsch and published by . This book was released on 1984 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Comparison of Recursive Least Squares and Kalman Filtering Excisors for Swept Tone Interference by :
Download or read book A Comparison of Recursive Least Squares and Kalman Filtering Excisors for Swept Tone Interference written by and published by . This book was released on 1992 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical note presents a Kalman filtering approach that is used for filtering narrowband interferers out of direct sequence spread spectrum signals. The approach is based on the digital phase-locked loop Kalman filter and is close to optimum in so far as demodulating an FM-type of interferer. Because the interference is assumed to be much stronger than either the signal or noise, the Kalman filter locks onto the interference and produces estimates of its phase and envelope. The algorithm is compared, through computer simulation, with the recursive least squares lattice algorithm for the case of a swept tone interferer. Examples of the phase- and envelope-tracking capabilities of the algorithm are presented, followed by bit error rate curves for the case of an interferer of bandwidth equal to 20% of the chip rate of the spread spectrum signal. The results show that with proper selection of the Kalman filter parameters, the Kalman filter excisor can outperform the recursive least squares algorithm by 2 dB. It is suggested that performance could perhaps be improved further by using a higher order Kalman filter to remove the residual phase-tracking error produced by the second order Kalman filter.
Book Synopsis Filter Distortion and Intersymbol Interference Effects in Direct-sequence Spread-spectrum Multiple-access Communication Systems by : Christopher Lance Johnson
Download or read book Filter Distortion and Intersymbol Interference Effects in Direct-sequence Spread-spectrum Multiple-access Communication Systems written by Christopher Lance Johnson and published by . This book was released on 1990 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Band-reject Filtering for Direct-sequence Spread Spectrum Communication Systems by : John Edward Uth
Download or read book Band-reject Filtering for Direct-sequence Spread Spectrum Communication Systems written by John Edward Uth and published by . This book was released on 1985 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Convex Projections Method for Improved Narrowband Interference Rejection in Direct Sequence Spread Spectrum Systems by : Krishna Rama Narayanan
Download or read book A Convex Projections Method for Improved Narrowband Interference Rejection in Direct Sequence Spread Spectrum Systems written by Krishna Rama Narayanan and published by . This book was released on 1994 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Filter Distortion Effects in Direct-sequence Spread-spectrum Multiple-access Communication Systems by : Robert Johnson Irvine
Download or read book Filter Distortion Effects in Direct-sequence Spread-spectrum Multiple-access Communication Systems written by Robert Johnson Irvine and published by . This book was released on 1992 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spread-Spectrum Communications in Non-Gaussian Channels by : H. V. Poor
Download or read book Spread-Spectrum Communications in Non-Gaussian Channels written by H. V. Poor and published by . This book was released on 1990 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall purpose of this research project was to seek new methods for improving the robustness and efficiency of spread-spectrum communications systems operating over non-Gaussian channels. The study was motivated in large part by the fact that modern military radio networks must operate in complex and variable noise environments that are often dominated by impulsive, non-Gaussian man-made noise sources. The research under this contract progressed in three basic areas: (1) optimum multiuser demodulation techniques; (2) direct-sequence spread-spectrum multiple-access (DS/SSMA) signaling through impulsive channels; and (3) improved suppression of narrowband interferers from spread-spectrum signals. The common thread binding these three disparate multiuser-communications research topics is the fact that each involves the processing of signals in non-Gaussian interference. In the first case, the non-Gaussian interference is the multiuser noise interfering with the demodulation of a given user; in the second case, the non-Gaussian interference is the impulsive noise dominating the channel; and in the third case, the non-Gaussian interference is the spread-spectrum signal itself as it interferes with the prediction and consequent excision of the narrowband interferer. (rh).
Book Synopsis Filter Distortion and Intersymbol Interference Effects in Direct Sequence Spread Spectrum Systems by : James Adam Uetrecht
Download or read book Filter Distortion and Intersymbol Interference Effects in Direct Sequence Spread Spectrum Systems written by James Adam Uetrecht and published by . This book was released on 1989 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Saw-based Adaptive Filter for the Suppression of Narrow-band Interference in a Spread Spectrum Communications Receiver by : Calvin J. Grant
Download or read book A Saw-based Adaptive Filter for the Suppression of Narrow-band Interference in a Spread Spectrum Communications Receiver written by Calvin J. Grant and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Linearly Constrained Fast Transversal Filter for Direct-sequence Spread Spectrum Interference Rejection by : James Patrick Michels
Download or read book A Linearly Constrained Fast Transversal Filter for Direct-sequence Spread Spectrum Interference Rejection written by James Patrick Michels and published by . This book was released on 1993 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Signal-to-noise-plus-interference Ratio Estimation and Statistics for Direct Sequence Spread Spectrum Code Division Multiple Access Communications by : Amit Gupta
Download or read book Signal-to-noise-plus-interference Ratio Estimation and Statistics for Direct Sequence Spread Spectrum Code Division Multiple Access Communications written by Amit Gupta and published by . This book was released on 2004 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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