Results 211 to 220 of about 51,657 (260)
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Spread Spectrum Communications—A Review
IETE Technical Review, 1993Spread spectrum communications have been used in military applications since long. They are now finding civilian applications also. This paper presents a review of different techniques of spectrum spreading, despreading, code acquisition and tracking. Some results on anti-jamming have been given.
S L Maskara, S Chakrabarti
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Spread spectrum for personal communication
29th IEEE Vehicular Technology Conference, 1979A cellular technique utilizing spread-spectrum signals is proposed for personal communication systems and some of the requirements for the system are analyzed. Specific items that are discussed include bandwidth requirements, number of unique addresses, limits on the number of active users, power requirements, signal penetration and self-regulating ...
G.R. Cooper, R.W. Nettleton
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Spread spectrum access methods for wireless communications
IEEE Communications Magazine, 1995The authors present an overview of the characteristics of code division multiple access (CDMA) as it is currently being envisioned for use in wireless communications. There are many considerations in the design of such systems, and there are multiple designs being discussed. CDMA has been proposed for both terrestrial links and satellite links. However,
Ryuji Kohno +2 more
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Spread Spectrum for Wireless Communications
1995Though originally developed as a military technology, spread-spectrum communications has achieved widespread commercial acceptance in the last several years. The increased interest in spread spectrum for wireless communications can be attributed to the high spectral effiiciency of Code Division Multiple Access techniques, and to the natural resistance ...
R. M. Buehrer, B. D. Woerner
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CCD matched filter in spread spectrum communication
Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361), 2002We study the feasibility of a charge coupled device (CCD) matched filter based on AlGaAs/GaAs high electron mobility transistor (HEMT) technology in a spread spectrum (SS) communication system. We show that the CCD matched filter can work in the IF stage including the carrier, and the power consumption is estimated to be approximately 40 mW in case of ...
Eiji Nishimori +3 more
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Channel characterisation for spread spectrum satellite communications
Proceedings of ISSSTA'95 International Symposium on Spread Spectrum Techniques and Applications, 2002The paper examines the characteristics of satellite propagation channels for spread spectrum communications. Based on measurement campaigns at L-band, the signal bandwidth is determined when the channel becomes frequency-selective. A wideband channel model for land mobile satellite (LMS) services is presented which characterises the time-varying ...
Jahn, A., Bischl, H., Heiß, G.
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Spread Spectrum Communication Systems
1980Publisher Summary This chapter discusses the spread spectrum communication systems. A classical method of information transmission applicable for analog signals that employs such a bandspreading technique, and thereby offers interference suppression is frequency modulation (FM).
P.W. Baier, M. Pandit
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Innovative coding scheme for spread-spectrum communications
Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361), 2002It is known that spread-spectrum (SS) communications in general, and code-division multiple access (CDMA) in particular, gain certain advantages in performance, if powerful low-rate error-correcting codes are used for error-protection in such systems.
Vladislav Sorokine +2 more
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SPREAD SPECTRUM COMMUNICATION THROUGH MODULATION OF CHAOS
International Journal of Bifurcation and Chaos, 1993In this letter we demonstrate experimentally how Chua’s circuits can be used to implement a secure communication system. This system is compared to another system proposed earlier. This system has the advantage of transmitting a spread spectrum signal and is also more secure in the sense that better parameter matching is required in order to recover ...
Halle, K. Sean +3 more
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Pseudorandom Sequence Generator for Spread Spectrum Communications
2018 10th International Conference on Electronics, Computers and Artificial Intelligence (ECAI), 2018This paper presents the design and the practical implementation of an efficient pseudorandom sequence generator that is intended to be used in the development of multichannel, high speed, interference resistant spread spectrum communication systems.
Daniel Alexandru Visan +3 more
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