Results 251 to 260 of about 1,121,618 (292)

Parameter Estimation for Waveforms in Additive Gaussian Noise

Journal of the Society for Industrial and Applied Mathematics, 1959
A stochastic process \(z(t)\) is observed over a given interval of time, where \(z(t) = x(t) + F(t,\xi)\), \(\xi\) is an unknown parameter, \(F(t,\xi)\) a real-valued function of time \(t\) and \(x(t)\) is a Gaussian process with known covariance function \(\psi_x(s, t)\). Estimates of a parameter \(f(\xi)\) are considered.
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Seismocardiography: waveform identification and noise analysis

[1991] Proceedings Computers in Cardiology, 2002
The seismocardiogram (SCG) provides a convenient and reliable measure of left ventricular systolic and diastolic performance both at rest and immediately after exercise. An effective means has been developed to eliminate noise artifacts such as coughing, talking, and patient movement prior to any waveform averaging scheme. A computer algorithm has been
J.M. Zanetti, M.O. Poliac, R.S. Crow
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Colored Noise and Regularization Parameter Selection for Waveform Metrology

IEEE Transactions on Instrumentation and Measurement, 2014
We study six algorithms to select a regularization parameter for deconvolution problems appearing in high-speed communication measurement applications. We investigate these algorithms in the presence of unspecified noise correlation analyzing their performance as components of a multivariate random variable and study their joint distribution by Monte ...
Andrew M. Dienstfrey, Paul D. Hale
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Random Noise Radar/Sodar With Ultrawideband Waveforms

IEEE Transactions on Geoscience and Remote Sensing, 2007
Random noise waveforms with ultrawide bandwidth improve the range resolution and reduces the probability of intercept in radar/sodar. As a result of the nonperiodic waveform, the range ambiguity is removed as well. By transmitting a sine signal that is phase or frequency modulated by random noise, autocorrelation functions with improved side lobe ...
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A compact, multichannel, and low noise arbitrary waveform generator

Review of Scientific Instruments, 2014
A new type of high functionality, fast, compact, and easy programmable arbitrary waveform generator for low noise physical measurements is presented. The generator provides 7 fast differential waveform channels with a maximum bandwidth up to 200 MHz frequency.
S, Govorkov, B I, Ivanov, E, Il'ichev, H-G, Meyer   +3 more
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Noise reduction algorithm for full-waveform lidar signal

2011 IEEE International Conference on Signal and Image Processing Applications (ICSIPA), 2011
Noise is an inevitable problem which affects coherent imaging systems and consequently reduces the capability of lidar systems to resolve variations in the target heights. Common noise-reduction procedures, including moving Mean and Median filters, operate on a global level and do not perform adaptively on different segments of the backscattered signal.
Manuel Fabiao Dionizio, Ali Shamsoddini, John C. Trinder   +2 more
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Continuous coded waveforms for noise radar

2007 International Waveform Diversity and Design Conference, 2007
This paper describes a new class of continuous waveforms for noise radar that can be processed using earlier developed methods for reducing pulse compression sidelobes and equalizing compressed pulses before Doppler filtering. The proposed waveforms are based on codes that modulate sub-pulses which define the bandwidth of the waveform.
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On the Performance of Speech Waveform Coders with Noise Spectral Shaping

IEEE Transactions on Communications, 1985
The performance of speech waveform coders that incorporate a noise spectral shaping filter is discussed. The coders studied are adaptive pulse code modulation (APCM), adaptive differential PCM (ADPCM), and adaptive delta modulation (ADM). For APCM and ADPCM, the noise shaping filter is designed to minimize the C-message weighted quantization noise ...
Hwang Soo Lee, Chong Kwan Un
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Fast bus waveform estimation at the presence of coupling noise

Proceedings of the 18th ACM Great Lakes symposium on VLSI, 2008
With the technology scaling and shrinking feature sizes, coupling noise has become one of the most critical concerns in today's interconnect-centric design, especially for long global buses. A very common consequence of coupling is that the output signal waveform becomes non-monotonic.
Jingye Xu, Pervez Khaled, Masud H. Chowdhury   +2 more
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Noise and distortion in transient waveform recorders

1988. IMTC-88. 5th IEEE Instrumentation and Measurement Technology Conference, 2003
A data-acquisition system that measures transient waveform recorder (TWR) performance and has self-test capability is described. It uses an HP9836 desktop computer with 2 megabytes of RAM storage, a 30-megabyte hard disc and two floppy discs, a ten-bit TWR interfaced on an HPIB interface, and a CAMAC crate capable of housing up to four 12-bit 20-MHz ...
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