Results 201 to 210 of about 282,649 (262)
High-Efficiency Radiation via Fast Electron Beam Pinching in Nonuniform Plasmas. [PDF]
Research (Wash D C)Zhu XL, Chen M, Sheng ZM.
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
IRE Transactions on Communications Systems, 1977
This paper describes an idealized spread-spectrum communication system. The processing gain concept is developed as a measure of a well-designed system's robust performance against independent wide-sense stationary interference. Multipath and repeater jammer rejection, partial correlation problems, and security requirements are related to spread ...
R Scholtz
exaly +3 more sources
This paper describes an idealized spread-spectrum communication system. The processing gain concept is developed as a measure of a well-designed system's robust performance against independent wide-sense stationary interference. Multipath and repeater jammer rejection, partial correlation problems, and security requirements are related to spread ...
R Scholtz
exaly +3 more sources
The Origins of Spread-Spectrum Communications
IEEE Transactions on Communications, 1982This monograph reviews events, circa 1920-1960, leading to the development of spread-spectrum communication systems. The WHYN, Hush-Up, BLADES, F9C-A/Rake, CODORAC, and ARC-50 systems are featured, along with a description of the prior art in secure communications, and introductions to other early spreadspectrum communication efforts. References to the
R Scholtz
exaly +2 more sources
Improvement of direct spreading spectrum by multi-spreading spectrum
IET 3rd International Conference on Wireless, Mobile and Multimedia Networks (ICWMMN 2010), 2010In the direct spreading spectrum(DSS) the number of length of spreading is less, and the several errors will lead to sharp decrease of peak-to-sidelobe ratio and the errors sometimes cannot be corrected. To solve this problem, a new method of Multi-Spreading Spectrum (i.e. MSS) with error-correcting ability is proposed.
null Fan Jing, null Xu Shufang
openaire +1 more source
The Spread Spectrum in Computing
Computing in Science & Engineering, 2006From time to time, I find it necessary to remind myself of how broadly computing applications are spread across the sciences and engineering. This breadth extends not only along the axes of computing complexity and disciplinary diversity, but also along task and sophistication. Over the years, this magazine has certainly highlighted the former two, but
openaire +1 more source
Passive spread-spectrum steganalysis
2011 18th IEEE International Conference on Image Processing, 2011We consider the problem of passive spread-spectrum steganalysis where the objective is to decide the presence or absence of spread-spectrum hidden data in a given image (a binary hypothesis testing problem). Unlike conventional feature-based approaches, we describe an unsupervised (blind) low-complexity approach based on generalized least-squares ...
Ming Li 0011 +4 more
openaire +1 more source
Spread spectrum image steganography
IEEE Transactions on Image Processing, 1999In this paper, we present a new method of digital steganography, entitled spread spectrum image steganography (SSIS). Steganography, which means "covered writing" in Greek, is the science of communicating in a hidden manner. Following a discussion of steganographic communication theory and review of existing techniques, the new method, SSIS, is ...
Lisa M. Marvel +2 more
openaire +2 more sources
Spread spectrum for commercial communications
IEEE Communications Magazine, 1991The authors describe how spread spectrum operates and explain why the FCC has allocated several spectral bands for spread spectrum. They examine what is wrong with the spectrum allocations the way they are now. They show who is using and will use spread spectrum and why.
Donald L. Schilling +4 more
openaire +1 more source