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A new high-gain cylindrical dielectric resonator antenna (DRA) with a large bandwidth is proposed. A cylindrical dielectric resonator (DR), a double-annular patch and a metallic cylinder are used to obtain a large bandwidth and a high gain. The mode TM12 excited in the patch is used to enhance the gain of the DRA, and the cavity formed by the metallic cylinder provides a further higher gain and a...
Detection of weak stochastic signal under non-Gaussian background is a difficult problem, especially when the prior knowledge of the background as well as the signal is lacking. Traditional detection methods hardly consider both non-Gaussian background and lack of prior knowledge condition simultaneously. This paper proposes an unknown stochastic signal detection algorithm using information geometry...
Water quality assessment is very important for monitoring water sources and main canal, which is beneficial to offer strategies for the management of water quality and environment. This paper proposes a water quality assessment method based on a sparse autoencoder network. In the proposed approach, a representation model is firstly learned via a sparse autoencoder trained by unlabeled water monitoring...
In this paper, the Positive constrained Least Absolute Shrinkage and Selection Operator (P-LASSO) is studied for sparse support recovery using the correlation information in Compressive sensing (CS). A structural constraint is obtained for selecting the regularization parameter in the case of additive Gaussian noise. Since the measurements are finite in practice, the probability of successful recovering...
Pulse diagnosis is one of the most important methods in traditional Chinese medicine diagnosis. In order to classify the human pulses effectively, feature extraction and pattern recognition are needed. In this paper wavelet transform is used to the feature extraction and the third layer wavelet energy and the wavelet entropy values are selected as the wavelet domain features. Therefore a new feature...
In this paper, we propose a new error concealment algorithm for video/image based on canonical correlation analysis (CCA). Motivated by the Intra prediction in H.264/AVC, it is reasonable to assume that there is a strong spatial correlation relationship between the lost regions and their known adjacent regions. Based on the above idea, we use CCA to estimate a correlation projection matrix which utilizes...
Aiming at the low rate of human gait recognition and other issues, a novel gait recognition based on gait energy image and linear discriminant analysis is proposed in this paper. Firstly, using background subtraction to segment contours of human body, then a gait cycle is computed with the change of body silhouette width; Secondly, using the images in gait cycle sequences to calculate the gait energy...
Traditional Support Vector Regression (SVR) Machine acts as approximating a regression function. This paper, however, proposes a novel multi-class classification approach based on the SVR framework, called Support Vector Regression Machine with Consistency (SVRC). The contributions of this paper are: (1) To implement multi-class classification task, were place the margin term with its l1 norm in the...
Underwater acoustic channel has some special properties: large propagation delay, limited bandwidth and poor quality of the physical link. The design of MAC protocol for underwater acoustic sensor networks is more difficult than terrestrial wireless networks. Because of the large propagation delay, the MAC protocol of the terrestrial wireless networks is not suitable for the underwater acoustic sensor...
Aiming at classic Mean Shift based on tracking algorithm can not track target when the speed changed, the paper proposed an improved algorithm based on corrected background weighted histogram(CBWH), the algorithm used two iterations on target, first time used mean shift to iterate and calculated the similarity coefficient, second iteration used twice the current frame center minus the previous frame...
With the recent development of wireless and sensing technology, wireless sensor devices have invaded the medical area with a wide range of capability. These devices allow medical practitioners to monitor the patients remotely and timely. However, it is known that the body movement can result in significant fluctuations of the radio signal, affecting the data communication. Real-time activity recognition...
Sparse decomposition method can be used to reduce the noise and reconstruct the underwater echo submerged in strong background noise. But if the distance between sonar and underwater target is larger than the maximum detection range of a given dictionary, this target will not be detected. Besides, if the target is near the boundary of a given dictionary but in an off-grid situation, this target will...
This paper proposes a new method for image registration by combining SURF and FREAK. SURF can extract robust feature points, and the topology of FREAK descriptor has strong ability of regional description. First, feature points of images are extracted by SURF, and described by FREAK descriptor. Then descriptors are roughly matched through the ratio of the closest neighbor and second closest one. Second,...
In order to extract facial features effectively, a face recognition method is proposed in this article, which combined with gamma transform and gabor transform on the basis of the traditional gabor filter method. First of all, the face images are processed with gamma transform, which can eliminate the effects of light and other nonlinear factors; and then decompose the face images by improved gabor...
In LTE system, there are generally two types of frequency offset: fixed frequency offset and Doppler frequency offset. In the paper, firstly, two improved methods of fixed frequency offset estimation are proposed, and then according to the frequency offset estimation, data can be compensated in inter-symbols and intra-symbols. Secondly, with the presence of two types of frequency offset in the system,...
The normal display of the video signal depends on the video sync signal. In the pragmatic applications, failing to display of the video signal usually subjects to the loss of the sync signal, and affects the regular production. And the excessive long transmission lines debilitate the video sync signals, which results in the video signal displaying abnormally. Bi-channel PAL sync signal switcher discussed...
In order to improve the accuracy of channel estimation in OFDM system, an improved algorithm Regularized Orthogonal Matching Pursuit (ROMP) Algorithm is proposed. The algorithm avoids choosing the wrong group and makes the group of atoms' energy more concentrated which is selected by modified regularized principle, then adds the secondary screening of estimation results, achieves an accurate reconstruction...
MIMO (multiple-input and multiple-output) radar with OFDM (orthogonal frequency-division multiplexing) waveform, i.e., OFDM-MIMO radar, transmits diverse carrier frequency narrowband signals, which can be synthetized to a wideband one to improve the resolution via a method in this paper. We firstly establish the echo model of OFDM-MIMO radar, and then derive the expression of phase compensating factor...
In order to improve the accuracy and speed of channel estimation in OFDM system, an improved Compressive Sampling Matching Pursuit (CoSaMP) algorithm was proposed. The new algorithm which improves the estimation accuracy and the estimation speed, added a least square estimation process to the estimation results. Moreover it optimized the number of atoms in candidate set and the terminal conditions...
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