Results 231 to 240 of about 92,198 (268)

Oversampled Wilson expansions

IEEE Signal Processing Letters, 1997
Orthonormal Wilson bases with good time-frequency localization have been constructed by Daubechies, Jaffard, and Journe (1991). We extend this construction to Wilson sets and frames with arbitrary oversampling (or redundancy). We state conditions under which dual Weyl-Heisenberg (WH) sets induce dual Wilson sets, and we formulate duality conditions in ...
H. Bolcskei, K. Grochenig, F. Hlawatsch, H.G. Feichtinger   +3 more
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Oversampled OFDM systems

Proceedings of 13th International Conference on Digital Signal Processing, 2002
Orthogonal frequency division multiplex (ODFM) is an attractive way of transmitting signals, by turning a wide-band signal into several narrow band ones. Orthogonal transmultiplexers are the basic tools required for emitting these signals and recovering them at the receiver side.
R. Hleiss, P. Duhamel, M. Charbit
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Optimum oversampling

The Journal of the Acoustical Society of America, 1989
A kernel is developed that enables a bandlimited signal to be optimally reconstructed from a finite number N of samples taken at the Nyquist rate or faster. The point reconstruction error, which falls as only N−0.5 at the Nyquist frequency, drops exponentially with N if there is even moderate oversampling.
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Minority Oversampling Using Sensitivity

2020 International Joint Conference on Neural Networks (IJCNN), 2020
The Synthetic Minority Oversampling Technique (SMOTE) is effective to handle imbalance classification problems. However, the random candidate selection of SMOTE may lead to severe overlap between classes and introduce new noise factors. Many variants of SMOTE have been proposed to relieve these problems by generating new examples in safe regions.
Jianjun Zhang, Ting Wang, Wing W. Y. Ng, Witold Pedrycz, Shuai Zhang, Chris D. Nugent   +5 more
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Oversampled Sigma-Delta Modulation

IEEE Transactions on Communications, 1987
Summary: Oversampled sigma-delta modulation has been proposed as a practical implementation for high rate analog-to-digital conversion because of its simplicity and its robustness against circuit imperfections. To date, mathematical developments of the basic properties of such systems have been based either on simplified continuous-time approximate ...
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Oversampled blind MLSDE receiver

2000 IEEE International Conference on Communications. ICC 2000. Global Convergence Through Communications. Conference Record, 2002
Oversampled blind maximum likelihood sequence detection and estimation (MLSDE) is proposed to improve the performance and robustness of the MLSDE receiver. The performance of the MLSDE receiver depends firmly on the assumed channel model and available knowledge about the channel parameters at the receiver.
H. Zamiri-Tafarian, S. Pasupathy
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Oversampled gain-boosting

Proceedings of the 2002 international symposium on Low power electronics and design - ISLPED '02, 2002
A dynamic gain-enhancement technique suitable for low-voltage low-power oversampling circuits, particularly sigma-delta converters, is presented. This method makes use of a discrete-time integrator to improve gradually the output resistance of the main amplifier over successive clocks.
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Oversampled differential clipper

The Journal of the Acoustical Society of America, 2002
A digital clipper is highly oversampled to decrease aliasing and increase accuracy. The difference between the clipper's input (50) and output (80) is then downsampled and added to the delayed, unclipped signal at Ix sample rate to achieve clipping. Filters (90) operating at Ix can be placed in series with the downsampled differentially-clipped signal ...
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Study on oversampling gain

IEEE 10th INTERNATIONAL CONFERENCE ON SIGNAL PROCESSING PROCEEDINGS, 2010
When the signal duration is fixed, whether parameter estimation precision can be improved by increasing the sampling frequency (oversampling) to get more sampling points? This problem of over-sampling gain is discussed. Over-sampling parameters estimation of complex sinusoid signal is studied in this paper, its oversampling gain is analyzed in theory ...
Donghai Li, Xiangming Liu, Kunfan Zhang
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Oversampled optical subband decomposition

Optical Engineering, 2000
A semidiscrete wavelet transform is realized using optical subband decomposition through which a signal is decomposed into translation-invariant subbands. Correspondingly, the translation parameter within each subband is discretized using a CCD array. since the sampling lattice of a CCD array is fixed, the subband signals can be oversampled, critically
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