Kalman Filtering of Narrowband Interference from Direct Sequence Spread Spectrum Communications Systems PDF Download
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Author: Brian William Kozminchuk
Publisher:
ISBN:
Category : Algorithms
Languages : en
Pages : 476
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Book Description
Author: Brian William Kozminchuk
Publisher:
ISBN:
Category : Algorithms
Languages : en
Pages : 476
Get Book Here
Book Description
![Kalman Filtering of Narrowband Interference from Direct-sequence Spread-spectrum Communications Systems [microform] PDF](https://books.google.com/books/content/images/frontcover/_OHsSgAACAAJ?fife=w80-h100)
Author: Brian William Kozminchuk
Publisher: National Library of Canada = Bibliothèque nationale du Canada
ISBN:
Category : Algorithms
Languages : en
Pages : 476
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 37
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Book Description
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.
Author: Katherine Jauregui Lovette
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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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.
Author: Ronald Athelstan Iltis
Publisher:
ISBN:
Category : Line receivers (Integrated circuits)
Languages : en
Pages : 328
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Author: Cheryl L. Stutzmann
Publisher:
ISBN:
Category : Adaptive filters
Languages : en
Pages : 156
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Book Description
Author: Don Torrieri
Publisher: Springer
ISBN: 3319140965
Category : Technology & Engineering
Languages : en
Pages : 650
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Book Description
This textbook provides a concise but lucid explanation of the fundamentals of spread-spectrum systems with an emphasis on theoretical principles. The choice of specific topics is tempered by the author’s judgment of their practical significance and interest to both researchers and system designers. Throughout the book, learning is facilitated by many new or streamlined derivations of the classical theory. Problems at the end of each chapter are intended to assist readers in consolidating their knowledge and to provide practice in analytical techniques. This third edition includes new coverage of topics such as CDMA networks, Acquisition and Synchronization in DS-CDMA Cellular Networks, Hopsets for FH-CDMA Ad Hoc Networks, and Implications of Information Theory, as well as updated and revised material on Central Limit Theorem, Power Spectral Density of FH/CPM Complex Envelopes, and Anticipative Adaptive-Array Algorithm for Frequency-Hopping Systems.
Author: John Keelan Grosspietsch
Publisher:
ISBN:
Category : Radio filters
Languages : en
Pages : 350
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 584
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