2002 14th International Conference on Digital Signal Processing Proceedings. DSP 2002 (Cat. No.02TH8628)
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Các bài báo tiêu biểu
Improving the speed and performance of adaptive equalizers via transform based adaptive filtering
Tập 2 - Trang 1301-1304 vol.2
Adaptive equalizers are widely used in many communication systems where the
channel frequency response characteristics are either time varying or unknown
such as the case in wireless and dial up telecommunication networks where the
communication channel constantly change due to the different packet routes and
switching that takes place, as well as due to the changes in the RF propagation.
This wor...
#Adaptive equalizers #Adaptive filters #Discrete Fourier transforms #Discrete wavelet transforms #Fourier transforms #Discrete cosine transforms #Eigenvalues and eigenfunctions #Frequency response #Time varying systems #Communication channels
Recursive non parametric spectral estimation from irregularly sampled observations
Tập 2 - Trang 799-802 vol.2
In this paper, the nonparametric spectral analysis of a randomly sampled signal
is discussed. In particular, a class of estimators is introduced: the IRINCORREL
class. This class is composed of recursive algorithms which both take into
account the sampling irregularity and the correlation of the signal values. The
study of the mean square estimation error shows that there is a trade off
between bi...
#Recursive estimation #Sampling methods #Spectral analysis #Signal processing algorithms #Frequency #Random variables #Large Hadron Collider #Estimation error #Convergence #Signal processing
Adaptive asymmetric diamond search algorithm for block-based motion estimation
Tập 2 - Trang 563-566 vol.2
We present an adaptive asymmetric diamond search (AADS) for block based motion
estimation. The proposed method exploits an adaptive search pattern based on the
predicted motion vector. In addition, the accuracy of the prediction is improved
by changing the initial search center position. Simulation results show that the
proposed algorithm can reduce the number of search points by up to about 50%
c...
#Motion estimation #Signal processing algorithms #Vectors #Video compression #Video sequences #Digital signal processing #Transform coding #Laboratories #Accuracy #Bandwidth
Towards automatic detection of coastlines from satellite imagery
Tập 2 - Trang 897-900 vol.2
An approach towards automatic coastline detection from satellite imagery through
edge detection techniques is presented. Linear transformations, such as Gaussian
filtering and nonlinear transformations, such as median, adaptive and
morphological filtering, are combined towards image smoothing and enhancement.
Two edge detectors are applied, a morphological Laplacian operator and the
classical Cann...
#Image edge detection #Satellites #Data mining #Smoothing methods #Detectors #Image resolution #Adaptive filters #Remote sensing #Nonlinear filters #Filtering
A blind adaptation algorithm for decision feedback equalizers with fractionally-spaced feedforward filters
Tập 2 - Trang 779-782 vol.2
This paper introduces a blind adaptation algorithm for decision feedback
equalizers (DFE) which employ an oversampled feedforward filter. The coefficient
set of the feedback filter is obtained from a pure recursive filter which is
designed to whiten the oversampled input signal in the sense that it minimizes
correlations between the original signal and versions of it which are shifted by
multiples...
#Decision feedback equalizers #Nonlinear filters #DSL #IIR filters #Blind equalizers #Convergence #Adaptive filters #Feedback circuits #Signal design #Data communication
Synchronous and asynchronous distributed DSP education
Tập 2 - Trang 1247-1251 vol.2
The Georgia Tech Regional Engineering Program (GTREP) was originally created to
provide the opportunity for students in southeastern Georgia to earn a Georgia
Tech undergraduate engineering degree without leaving the region. Students
complete two years of general education and engineering prerequisites at their
home institutions before beginning the Georgia Tech curriculum as juniors.
Georgia Tech...
#Digital signal processing #Educational programs #Computer science education #Production #Libraries #Signal processing #Image processing #Educational technology #Testing #Computer aided instruction
Author index
Tập 2 - Trang XLIX-LVI - 2002
The author index contains an entry for each author and coauthor included in the
proceedings record.
Performance analysis of LCL-PTV narrowband interference suppression algorithms
Tập 2 - Trang 643-646 vol.2
This paper deals with the performance assessment of receivers employing linear
conjugate-linear (LCL) periodically time-varying (PTV) filters, proposed to
suppress narrowband interference (NBI) in code-division multiple-access (CDMA)
overlay systems. The bit-error-rate (BER) at the output of the matched-filter
receiver is evaluated analytically, by resorting to the standard Gaussian
approximation....
#Performance analysis #Narrowband #Interference suppression #Multiaccess communication #Time varying systems #Nonlinear filters #Multiple access interference #Bit error rate #Impedance matching #Gaussian approximation
A fast object detection algorithm using motion-based region-of-interest determination
Tập 2 - Trang 1105-1108 vol.2
In this paper, we present a new fast algorithm for achieving motion-based object
detection in an image sequence. While in most existing object-detection
algorithms, segmentation of the image is done as the first step followed by
grouping of segments, the proposed algorithm uses the motion information to
first identify what we call region of interest. Segmentation is done only within
a square of in...
#Object detection #Image segmentation #Surface topography #Image sequences #Motion estimation #Motion detection #Pixel #Shape #Tracking #Video coding
A new method for complete-to-overcomplete discrete wavelet transforms
Tập 2 - Trang 501-504 vol.2
Overcomplete discrete wavelet transforms (ODWT) are used in a number of
applications because they provide shift invariance, a property extremely useful
in wavelet-based image processing and video coding. In this paper, we propose a
new construction of the ODWT starting from the subbands of the critically
sampled (complete) DWT. The most straightforward application of our theory is
scalable video c...
#Discrete wavelet transforms #Video coding #Filters #Image processing #Motion estimation #Image reconstruction #Parallel processing #Filtering #Production #Concurrent computing