OptimalTrans.rar - This paper studies a cooperative cognitive radio net-work where two primary users (PUs) exchange information with
the help of a secondary user (SU) that is equipped with multiple
antennas and in return, the SU superimposes its own messages
along with the primary transmission. The fundamental problem
in the considered network is the design of transmission strategies
at the secondary node. It involves three basic elements: first,
how to split the power for relaying the primary signals and fo,2013-02-11 00:46:16,下载29次
SparseMV.rar - Minimum variance and array signal processing ,2013-02-11 00:44:14,下载2次
MMSE.rar - In this letter, we derive a minimum mean squared
error (MMSE) optimal estimator for clean speech spectral am-plitudes, which we apply in single channel speech enhancement.
As opposed to state-of-the-art estimators, theoptimal estimator
is derived for a given clean speech spectral phase. We show that
the phase contains additional information that can be exploited
to distinguish outliers in the noise from the target signal.,2013-02-11 00:41:56,下载11次
Sparsifying.rar - The sparsity of signals and images in a certain trans-form domain or dictionary has been exploited in many applications
in signal and image processing. Analytical sparsifying transforms
such as Wavelets and DCT have been widely used in compression
standards. Recently, synthesis sparsifying dictionaries that are di-rectly adapted to the data have become popular especially in appli-cations such as image denoising, inpainting, and medical image re-construction.,2013-02-11 00:40:12,下载23次
FreqEstimation.rar - This letter presents a novel algorithm to compute the
instantaneous frequency (IF) of a multicomponent nonstationary
signal using a combination of fractional spectrograms (FS). A high
resolution time frequency distribution (TFD) is defined by com-bining FS computed using windows of varying lengths and chirp
rates. The IF of individual signal components is then computed by
applying a peak detection and component extraction procedure,2013-02-11 00:38:19,下载47次
FaceVerification.rar - In this letter, a local sparse representation is proposed
for face components to describe the local structure and character-istics of the face image for face verification. Wefirst learn a dictio-nary from collected local patchesof face images. Then, a novel local
descriptor is presented by using sparse coefficients obtained by the
learned dictionary and local face patches from face components to
represent the entire human face,2013-02-11 00:35:55,下载33次
FuzzyAlgorithm.rar - Fuzzy c-means (FCM) with spatial constraints has
been considered as an effective algorithm for image segmentation.
Student’s t-distribution has come to be regarded as an alternative
to Gaussian distribution, as it is heavily tailed and more robust for
outliers. In this letter,,2013-02-11 00:34:35,下载53次
Windowing.rar - In this letter, we propose anovel family of windowing
technique to compute mel frequency cepstral coefficient (MFCC)
for automatic speaker recognition from speech. The proposed
method is based on fundamental property of discrete time Fourier
transform (DTFT) related to differentiation in frequency domain.
Classical windowing scheme such as Hamming window,2013-02-11 00:33:16,下载8次