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An introduction to spread spectrum

C. Cook, H. Marsh
1983 IEEE Communications Magazine  
Bernfeld) of Radar Signals-An Introduction to Theory and Application (New York: Academic Press).  ...  to generate spread spectrum signals. .  ... 
doi:10.1109/mcom.1983.1091346 fatcat:lxysnyjehffqbfijiaaghuabwe

Spread spectrum systems, 2nd ed

L.H. Sibul
1987 Proceedings of the IEEE  
They are reprinted here to make them conveniently available to the many readers who otherwise might not have ready access to them. Each review is followed b y an identification of its original source.  ...  This bookgives many practical insights to spread spectrum technology. This book is recommended as an introduction to spread spectrum technology.  ...  Dixon's book Spread Spectrum Systems is an updated and expanded introduction into the fascinating subject of spread spectrum techniques.  ... 
doi:10.1109/proc.1987.13889 fatcat:ieeyirw4knb4jgrovs4ldxzzry

Improved Performance Evaluation of Frequency Hopped spread spectrum using QAM/FSK Modulation Techniques

Rajiv MohanDavid, Kumara Shama, K. Prabhakar Nayak
2012 International Journal of Computer Applications  
The main aim here is to calculate the bit error performance of a frequency hopping spread spectrum model in the presence of AWGN channel.  ...  There have been investigations into the frequency hop spread spectrum systems employing different modulation schemes to decrease the bit error ratios.  ...  Borth, Introduction to Spread-Spectrum Communications. Englewood Cliffs, NJ: Prentice-Hall, 1995.  ... 
doi:10.5120/6178-8607 fatcat:w4d23z6pjjh6tod4znu7nrlc4q

SIMULINK Simulation Implementation of DS/FH Hybrid Spread Spectrum Communication System

Bing Ma, Ye He, Hualong Ma, Changren Yu, Yansong Wang
2018 MATEC Web of Conferences  
Direct-sequence spread spectrum and frequency hopping are the most widely used two kinds of spread spectrum technologies.  ...  The basic principle of DS/FH hybrid spread spectrum communication system is introduced.  ...  Introduction 2 Introduction to the basic principle of DS/FH The direct-spread/frequency-hopping spread spectrum system is a function of adding a carrier frequency hopping on the basis of a direct-sequence  ... 
doi:10.1051/matecconf/201823204025 fatcat:nauxmkah6fakbprakolqotnf4y

Accurate hydrogen depth profiling by reflection elastic recoil detection analysis

R.D. Verda, J.R. Tesmer, M. Nastasi, R.W. Bower
2002 Nuclear Instruments and Methods in Physics Reseach B  
Together, the energy spread correction and the channel-depth conversion comprise an accurate and convenient hydrogen depth profiling method. PACS : 61.18.Bn 61.43.Bn 61.72.Ss 61.72.Tt  ...  But the channel-depth conversion does not correct for energy spread, the unwanted broadening in the energy of the spectra, which can lead to errors in depth profiling.  ...  [ 2 ] presents an experimental technique to determine energy spread, which allows the actual variance of a spectrum to be determined using Eq. (1).  ... 
doi:10.1016/s0168-583x(02)00473-1 fatcat:s45ahfzsh5djtlnd37fbf7y5ui

Robust and Reliable Communication Meets Future Mobile Communication Demands

Alois M. J. Goiser, Samar Khattab
2010 2010 Sixth International Conference on Autonomic and Autonomous Systems  
The suitability of the spread-spectrum technology for future wireless applications is investigated.  ...  The spread-spectrum technology offers the RAKE receiver structure to mitigate the most harmful type of interference in a mobile application, the multipath interference.  ...  For an introduction to the global view of IR see [8] . We start with a brief description of robustness and reliability in Section II.  ... 
doi:10.1109/icas.2010.31 dblp:conf/icas/GoiserK10 fatcat:fg7ynu3av5hyblmroepnkiokdm

Analysis of the power spectra, autocorrelation function and EEG time-series signal of a network of leaky integrate-and-fire neurons with conductance-based synapses

Andre DH Peterson, Hamish Meffin, Anthony N Burkitt, Iven MY Mareels, David B Grayden, Levin Kuhlmann, Mark J Cook
2009 BMC Neuroscience  
Future research will be directed toward incorporating an epileptic focus into a network of columns to investigate seizure propagation dynamics as described in the introduction.  ...  Introduction Focal epilepsy is characterized by the spread of seizure activity from pathological cortical tissue (focus) to other parts of the surrounding cortex and is typically diagnosed via the EEG  ...  Future research will be directed toward incorporating an epileptic focus into a network of columns to investigate seizure propagation dynamics as described in the introduction.  ... 
doi:10.1186/1471-2202-10-s1-p167 fatcat:mbordvbgnrabdmaafkg3rwminu

The varying w spread spectrum effect for radio interferometric imaging [article]

Laura Wolz, Filipe B. Abdalla, Rafael E. Carrillo, Yves Wiaux, Jason D. McEwen
2013 arXiv   pre-print
We study the impact of the spread spectrum effect in radio interferometry on the quality of image reconstruction.  ...  This spread spectrum effect will be induced by the wide field-of-view of forthcoming radio interferometric telescopes.  ...  The increased incoherence due to this spread spectrum effect acts to improve the fidelity of image reconstruction [3] . III.  ... 
arXiv:1301.7259v1 fatcat:2l4du2mpf5a2des5bnl2tpkn2u

Simulation of Direct Sequence Spread Spectrum for Wireless Communication Systems using Simulink

Y.V.S Durga Prasad, K. Venkateswarlu
2018 International Journal of Trend in Scientific Research and Development  
In telecommunications, DSSS is a spread spectrum modulation technique used to reduce overall signal interference.  ...  In this work, a simulation model for Direct Sequence Spread Spectrum (DSSS) scheme for wireless communication systems has been proposed.  ...  If the total transmitted power is similar to that of the single DSBSC case, then the power of an individual DSBSC in the spread spectrum case is To achieve most of the claims made for the spread spectrum  ... 
doi:10.31142/ijtsrd14118 fatcat:xul42h5ywjb77mt7tj6lku3g6m

Easing radiated EMC problems with spread-spectrum modulation of computer clock signals

D.A. Stone, B. Chambers
1995 Electronics Letters  
The MS also estimates CIN, and the delay spread for the next down-link, determines the optimum modulation parameters, and informs them to the base stations.  ...  Pilot symbols which are used to compensate for fading distortion [3] are inserted in preamble or), midamble and postamble (Po). conventional A M s .  ...  The ratio of the interference bandwidth to the spread spectrum bandwidth p and the ratio of the offset of the interference carrier frequency to half of the spread spectrum bandwidth q are defined as P  ... 
doi:10.1049/el:19951416 fatcat:fdcue5dugbha5phuj2p6fbuo6m

Design and Realization of FH-CDMA Scheme for Multiple-Access Communication Systems [chapter]

Abdul Baqi, Sajjad Ahmed Soomro, Safeeullah Soomro
2011 Communications in Computer and Information Science  
In order to improve the spreading process of the spread spectrum modulation system, the conventional pseudorandom code has been replaced by chaotic signal owing to its dynamical behaviour.  ...  The spreading code generator has been implemented using discrete integrated circuits and components in which output is controlled by a conventional PN code.  ...  Introduction This Spread Spectrum is a type of modulation that spreads the modulated signal across available frequency band, in excess of minimum bandwidth required to transmit the modulating signal [  ... 
doi:10.1007/978-3-642-23321-0_25 fatcat:ceoycfnrqbdujfmnskyn7rwyvy

Towards joint routing and spread-spectrum channelization in cognitive ad hoc networks

Kanke Gao, Lei Ding
2010 Proceedings of the ACM CoNEXT Student Workshop on - CoNEXT '10 Student Workshop  
We consider a spread-spectrum channelization based secondary network that operates cognitively to coexist with primary users.  ...  A new framework for cross-layer design that incorporates adaptation between spectrum-spreading channelization and routing is proposed.  ...  INTRODUCTION Cognitive radio networks [1, 2] have emerged as a promising technology to improve the utilization efficiency of the existing radio spectrum.  ... 
doi:10.1145/1921206.1921225 dblp:conf/conext/Gao010 fatcat:uve53fj435crheftuzgej3ecay

A Watermarking Method with a New SS Technique [chapter]

Kun Hua, Liang Pu
2007 Lecture Notes in Computer Science  
SSW hides information which is called watermark by spreading its spectrum and then adding them to a host image as a watermarked image. Spreading spectrum is done by a pseudo-noise (PN) sequence.  ...  Among numerous techniques of information concealment, Spread spectrum watermarking (SSW) has proved to yield improved results when robustness against attack is at a premium.  ...  Spread spectrum technology is an important anti-interference technology in the watermarking.  ... 
doi:10.1007/978-3-540-72588-6_138 fatcat:krfeaatnvfdh5jemiegas2hehq

Real Time System Applications in Spread Spectrum Communication: A Literature Review

Shahid Latif
2014 International Journal of Signal Processing, Image Processing and Pattern Recognition  
RTS is an information processing system which has to respond to some input stimuli with in finite & specified period of time and to schedule the shared resources among different tasks.  ...  Spread Spectrum communication system is one of the most important types of the modern telecommunication systems.  ...  Introduction Spread spectrum communication is a technique in which the information signal (normally an electrical or EM signal) of a particular narrow bandwidth is consciously spread which results in a  ... 
doi:10.14257/ijsip.2014.7.1.03 fatcat:kyv6gddvprgpbkpw7xj2zwzp3u

FPGA Implimentation of DSSS Transmitter Using Pseudo Chaotic Sequence

Nandini A Gumgaonkar
2018 International Journal for Research in Applied Science and Engineering Technology  
Spread spectrum technology provides strong secure communication & reduces mixing of communication. In this paper we specified the design of DSSS (Direct Sequence Spread Spectrum) transmitter.  ...  The interference problems associated with narrow-band very high frequency and ultra high frequency Data transfer systems are reduced by a new data transfer technology known as Spread spectrum (SS) technology  ...  INTRODUCTION In spread spectrum communication systems, Pseudo noise sequence is used to spread the bandwidth of transmitting signal.  ... 
doi:10.22214/ijraset.2018.5205 fatcat:4cwhgybbhvgmxk5bs45amp25je
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