On the Performance of the Direct-sequence Spread-spectrum Code Tracking in the Presence of Cyclostationary Interference PDF Download

Author: Haiping Tsou
Publisher:
ISBN:
Category : Cyclostationary waves
Languages : en
Pages : 882

View

Book Description

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 860

View

Book Description

Author: Raimundo Sampaio Neto
Publisher:
ISBN:
Category : Electric interference
Languages : en
Pages : 508

View

Book Description

Author: Don Torrieri
Publisher: Springer
ISBN: 3319140965
Category : Technology & Engineering
Languages : en
Pages : 650

View

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: Nersi Nazari
Publisher:
ISBN:
Category : Radio
Languages : en
Pages : 284

View

Book Description

Author:
Publisher:
ISBN:
Category : Combat survivability (Military engineering)
Languages : en
Pages : 464

View

Book Description

Author: Peter Michael Tanner
Publisher:
ISBN:
Category :
Languages : en
Pages : 74

View

Book Description

Author: Madan Venn
Publisher:
ISBN:
Category : Coding theory
Languages : en
Pages : 190

View

Book Description
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.

Author: Matthew G. Glen
Publisher:
ISBN: 9781423519928
Category : Coding theory
Languages : en
Pages : 78

View

Book Description
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.

Author: 吳雅婷
Publisher:
ISBN:
Category : Spread spectrum communications
Languages : en
Pages : 224

View

Book Description