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Due to the sparsity that contained in underwater acoustic (UWA) channels, in recent years tremendous attention has been drawn in designing sparse channel estimation algorithms for improve the performance of channel equalizer, which is driven by channel estimator. However, experimental evaluation and comparison is limited regarding enhancing the performance of different norm constraint sparse channel...
The speed of user equipment (UE) is significant in improving the performance of orthogonal frequency division multiplexing (OFDM) systems. Estimating the speed can help in adaptively allocating resources to users, reducing call drop rate in handoff, selecting the optimal radiation pattern, etc. The Doppler spread caused by the relative movement between transmitter and receiver can be utilized to estimate...
As the Internet environment becomes more and more complex and the network scale expands greater and greater, the unexpected anomaly occurs constantly. Due to lag and subjectivity in building a model and the shortage in terms of speed for traditional detection methods, a fast anomaly detection scheme is proposed in this paper, which is based on research into "self-similar" feature. Estimation...
The paper proposed a new algorithm to estimate source number based on cyclic spectrum and curve clustering. The cyclic amplitude spectrum expressions of common digital communication signals are analyzed. And the vanishing characteristics of the interference in the estimation of cyclic correlation using finite observations are derived. Then the estimation algorithm based on cyclic amplitude spectrum...
A neural network model is proposed to estimate the parameters of inter-harmonics. As to this specific neural network, an adaptive learning algorithm based on improved Levenberg-Marquardt algorithm is derived. Because of the complete match between the neural network and the inter-harmonic model, the presented algorithm can effectively improve the precision in the process of inter-harmonics estimation...
Completion time estimation for workflow instances is an important basis for real time workflow management and scheduling. Current researches on this topic omitted the fact that: instances of workflow that contains OR-SPLIT are certain to bypass some activities, thus at a particular time point, estimation of completion time for workflow instances should be based merely on activities that were already...
In workflow systems, time performance of workflow instances is key to business management and scheduling. Firstly, the concept of active transition was proposed and its performance equivalent model was analyzed under resources-limited circumstances. Then, the concept of active pattern was proposed and time performances of four basic active patterns were deduced. Finally, an example was given to demonstrate...
3D-TV is well expected as next advancement in television. The conversion technique of two-dimensional (2D) images to 3D images is an effective way to alleviate the shortage of 3D contents. The most important and difficult problem in 2D-to-3D conversion is how to generate or estimate depth information using only a single-view image. In this paper, a new approach to estimate depth map from monocular...
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