Results 241 to 250 of about 241,566 (298)
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Statistical signal processing in broadband reflectometry
Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002Microwave broadband reflectometry is used to determine the spatial distribution of plasma density (density profile) in experimental nuclear fusion devices. The position of each plasma reflecting layer is evaluated by Abel integration of the phase rate of the reflectometric signal that results from mixing the plasma incident and reflected waves.
Fernando D. Nunes, José M. N. Leitão
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Bearing resolution limits for broadband signals
ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing, 2003Analytical lower bounds on bearing accuracy for two broadband radiating sources which are located within a beamwidth at an array are presented. The power levels of the radiated signals are not necessarily known a priori. It is demonstrated that at modest signal-to-noise ratio, accuracy reductions in a multiple-source setting depend on the inverse ...
Miriam Hamilton, John P. Ianniello
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DOA estimation for broadband chirp signals
2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004We derive two new methods, based on the ambiguity function, for estimating the direction-of-arrival (DOA) of broadband chirp signals. These new methods make use of the time-frequency structure of the chirp signal and can be applied to any aperture array and any chirp rate. As long as the signals are separable in the ambiguity function plane, the number
Ning Ma, Joo Thiam Goh
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Detecting nonlinear oscillations in broadband signals
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2009A framework for detecting nonlinear oscillatory activity in broadband time series is presented. First, a narrow-band oscillatory mode is extracted from a broadband background. Second, it is tested whether the extracted mode is significantly different from linearly filtered noise, modeled as a linear stochastic process possibly passed through a static ...
Vejmelka, Martin, Palus, Milan
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Towards a model for discrimination of broadband signals
The Journal of the Acoustical Society of America, 1986The conventional model for broadband discrimination assumes that resolution is limited by peripheral internal noise that is statistically independent across channels. In this paper, we extend this model in a number of directions. In particular, we compute, compare, and discuss the effects of interchannel correlation and central noise on the sensitivity
N I, Durlach, L D, Braida, Y, Ito
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Signal processing for broadband communications
European Transactions on Telecommunications, 1992AbstractSignal processing affects all aspects of broadband communications: terminals, transmission media and networking techniques. In this context, the paper provides a review of several basic signal processing concepts, which can now be implemented and exploited, with the present technological capabilities: perfect filter banks, fast adaptive ...
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Estimation of angles of arrivals of broadband signals
ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005A high resolution one-step algorithm for estimating the angles of arrivals of multiple wideband sources is proposed. For a dense and equally spaced array structure, a bilinear transformation is utilized in frequency domain for coherent signal subspace processing.
Shaw, Arnab K., Kumaresan, Ramdas
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New directions in signaling for broadband ISDN
IEEE Communications Magazine, 1989User networks signaling is considered. The evolution of signaling protocols is outlined, analyzing the forces producing changes in the past. Emerging broadband switching technologies and services are discussed, emphasizing capabilities that might be required.
Steven E. Minzer, Dan R. Spears
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ESTIMATION OF THE CAPABILITIES OF BROADBAND RECEIVERS FOR DETECTING BROADBAND SIGNALS
ВЕСТНИК ВОРОНЕЖСКОГО ГОСУДАРСТВЕННОГО ТЕХНИЧЕСКОГО УНИВЕРСИТЕТА, 2021Рассмотрена задача обнаружения радиолокационных дискретных составных частотных сигналов широкополосными приемниками с программными обнаружителями. Данный тип сигналов нашел большое применение в радиолокации благодаря высокой помехоустойчивости и энергетической скрытности.
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1999
Customer requirements are becoming more exacting as quality expectations rise and the demand for new services escalates. With the increasing range of services, bandwidth requirements are also increasing. Although 64 kbit/s circuits are adequate for telephony, the emergence of multi-media services is spawning massive increases in bandwidth requirements.
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Customer requirements are becoming more exacting as quality expectations rise and the demand for new services escalates. With the increasing range of services, bandwidth requirements are also increasing. Although 64 kbit/s circuits are adequate for telephony, the emergence of multi-media services is spawning massive increases in bandwidth requirements.
openaire +2 more sources