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On The Performance Of The Direct Sequence Spread Spectrum Code Tracking In The Presence Of Cyclostationary Interference
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Book Synopsis On the Performance of the Direct-sequence Spread-spectrum Code Tracking in the Presence of Cyclostationary Interference by : Haiping Tsou
Download or read book On the Performance of the Direct-sequence Spread-spectrum Code Tracking in the Presence of Cyclostationary Interference written by Haiping Tsou and published by . This book was released on 1992 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spread-spectrum Code Tracking in the Presence of Interference by : Raimundo Sampaio Neto
Download or read book Spread-spectrum Code Tracking in the Presence of Interference written by Raimundo Sampaio Neto and published by . This book was released on 1983 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Principles of Spread-Spectrum Communication Systems by : Don Torrieri
Download or read book Principles of Spread-Spectrum Communication Systems written by Don Torrieri and published by Springer. This book was released on 2015-04-23 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis The Performance of Direct-sequence Spread-spectrum Multiple-access Systems Including Jamming and Partial Code Correlation Effects by : Nersi Nazari
Download or read book The Performance of Direct-sequence Spread-spectrum Multiple-access Systems Including Jamming and Partial Code Correlation Effects written by Nersi Nazari and published by . This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Communications--fusing Command, Control, and Intelligence by :
Download or read book Communications--fusing Command, Control, and Intelligence written by and published by . This book was released on 1992 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Digital Code Tracking Loop for Use in Direct Sequence Spread-spectrum Systems by : Peter Michael Tanner
Download or read book A Digital Code Tracking Loop for Use in Direct Sequence Spread-spectrum Systems written by Peter Michael Tanner and published by . This book was released on 1995 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Convolutional Coded Generalized Direct Sequence Spread Spectrum by : Madan Venn
Download or read book Convolutional Coded Generalized Direct Sequence Spread Spectrum written by Madan Venn and published by . This book was released on 2008 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we investigate the worst-case performance of coded ordinary and coded generalized direct sequence spread spectrum (DSSS) systems in a communication channel corrupted by an unknown and arbitrary interfering signal of bounded power. We consider convolutional codes with Viterbi decoding in order to compare the performance of coded ordinary and coded generalized DSSS systems. For the generalized DSSS system, we use a pulse stream of +1,-1 and 0 as the spreading sequence, which is different from ordinary DSSS system which uses the typical sequence with pulse values of +1 and -1. A C program for performing Monte-Carlo simulations is written in order to evaluate and compare the performance of coded ordinary and coded generalized DSSS systems. Plots of the worst-case error probability versus signal-to-interference ratio are presented for different code rates and constraint lengths of the convolutional code. Simulation results of the worst-case performance of ordinary and generalized DSSS show that generalized DSSS consistently performs appreciably better than ordinary DSSS. Simulation is performed for various code rates, various constraint lengths of the convolutional code and various lengths of the convolutional interleaver. Over all these simulations, it is observed that the difference between ordinary and generalized DSSS gets more pronounced as the channel gets worse.
Book Synopsis Multiple Access Interference Characterization for Direct-Sequence Spread-Spectrum Communications Using Chip Waveform Shaping by : Matthew G. Glen
Download or read book Multiple Access Interference Characterization for Direct-Sequence Spread-Spectrum Communications Using Chip Waveform Shaping written by Matthew G. Glen and published by . This book was released on 2004-03-01 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research characterizes MAI effects on DS/SSMA system performance through simulation in Matlab , and explores the impact of multiple access code selection, chip waveform shaping, and multiple access code length on BER for both synchronous and asynchronous multiple access networks. In addition, the simulated DS/SSMA model permits rapid research into the effects of additional factors on BER. Prior to experimental testing, model validation is conducted through single user trials and by comparison with existing research for similar system designs. For synchronous and asynchronous networks, Gold coding improves BER by 7.5 and 4.0 dB, respectively, relative to aperiodic random spreading codes. Synchronous network results show that chip waveform shaping provides no significant BER improvement for the Blackman or Lanczos shapes. However, asynchronous network results show a potential BER improvement for Blackman and Lanczos shapes. Increasing code length from 31 to 511 resulted in a 7.5 dB BER improvement. Collectively, these results directly relate changes in BER to waveform cross-correlation statistics.
Book Synopsis Code Tracking for Direct-sequence Spread-spectrum Systems Under Multiuser Environment and Multipath Fading Channels by : 吳雅婷
Download or read book Code Tracking for Direct-sequence Spread-spectrum Systems Under Multiuser Environment and Multipath Fading Channels written by 吳雅婷 and published by . This book was released on 2009 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sequence Synchronisation in Chaos-based Direct Sequence Spread Spectrum Communication Systems by : Ramin Vali
Download or read book Sequence Synchronisation in Chaos-based Direct Sequence Spread Spectrum Communication Systems written by Ramin Vali and published by . This book was released on 2012 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an investigation into the modelling and performance of sequence synchronisation in Chaos-based Direct Sequence Spread Spectrum (CDS-SS) communication systems with the aims of identifying the existing gaps in research and suggesting a new and accurate modelling approach. The CDS-SS systems offer physical layer security without the need for a significant increase in computation or power requirements. This is significant when conventional encryption techniques cannot be used on secure communication systems because of their high power requirements as well as computational intensity. The main focus of this thesis is the problem of synchronising chaos-based spreading sequences. The modelling approaches previously used for chaos-based spreading codes do not take their non-binary nature into account and are not accurate as a result. This thesis extends the existing analysis in the literature to include CDS-SS synchronisation in presence of channel fading. Subsequently, an accurate approach is developed for modelling the synchronisation block of a CDS-SS system. This approach is based on the statistical description of chaos-based spreading codes cross- and auto-correlation functions and is termed chaos correlation statistics (CCS). To verify the validity of this approach, the acquisition stage of a CDS-SS synchronisation block is modelled using three scenarios: noise, fading and interleaving. It has been shown that the CCS method makes an accurate prediction of the acquisition phase performance for all three scenarios considered. The CCS method is also used to model a CDS-SS tracking loop statistically with high accuracy as verified by comparison with numerical analysis results. The effects of tracking loop errors and timing jitter on the probability of error have been derived for the same three scenarios mentioned above. These newly derived probability of error equations are verified by extensive simulation results. Overall it is concluded that sequence synchronisation for CDS-SS systems is possible and the CCS method is a suitable tool for accurate prediction of synchronisation performance in CDS-SS systems. Also, the CCS approach can be used in any scenario in which accurate modelling of the correlation function of non-binary spreading sequences is needed.
Book Synopsis A Conceptual Design and Simulation of a Direct Sequence Spread Spectrum Code Tracking Loop by : Barry Jack Fowler
Download or read book A Conceptual Design and Simulation of a Direct Sequence Spread Spectrum Code Tracking Loop written by Barry Jack Fowler and published by . This book was released on 1993 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Adaptive Direct-sequence Spread-spectrum Communications by : Rahul Singh
Download or read book Adaptive Direct-sequence Spread-spectrum Communications written by Rahul Singh and published by . This book was released on 1996 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct-Sequence Spread-Spectrum Performance in a Multipath Fading Environment by :
Download or read book Direct-Sequence Spread-Spectrum Performance in a Multipath Fading Environment written by and published by . This book was released on 1993 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of coherent direct-sequence spread-spectrum communication systems with specular multipath fading is analyzed in terms of average probability of error. Approximations to such are based on the characteristic-function method. The probability mass function of the correlation receiver output is also derived with this approach. Numerical results are presented for various multipath environments with deterministic gain coefficients and channel coding applications. Spread-spectrum communications, Multipath fading.
Book Synopsis Electrical & Electronics Abstracts by :
Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 1948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Direct Sequence Spread Spectrum (DS/SS) Chip Coding Techniques for Enhancing Low-probalility of Intercept (LPI) Performance by : Abdulqader Mohamed Saeed Haisan
Download or read book Direct Sequence Spread Spectrum (DS/SS) Chip Coding Techniques for Enhancing Low-probalility of Intercept (LPI) Performance written by Abdulqader Mohamed Saeed Haisan and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Self Encoded Spread Spectrum Synchronization and Cooperative Diversity by : Kun Hua
Download or read book Self Encoded Spread Spectrum Synchronization and Cooperative Diversity written by Kun Hua and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main theme of this research is to improve data quality and security, optimize wireless networking system performance over wireless networks. concerned a novel self-encoded spread spectrum (SESS) network. It provides a feasible practical implementation for random spreading codes. The traditional transmit and receive PN code generators are not needed. Instead, the spreading codes are extracted from the user's information bits itself. Comparing to conventional CDMA, SESS completely abandons the use of pseudo-random spreading codes. The code variability doesn't depend on the spreading length like pseudo-random codes. SESS can achieve 3dB performance gain comparing to the conventional uncoded direct sequence spread spectrum system. The author considers initial acquisition as a global optimization problem and employ genetic search algorithm for converging to the global optimization efficiently. In the tracking phase, Markov chain analysis is used to examine the mean tracking time. SESS is incorporated with cooperative diversity (CD) technique (SESS-CD) to achieve spatial diversity gain with the number of relays.It's stability in highly correlated rayleigh channels has been observed.
