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In cognitive radio, the cognitive users should ensure the communication of the primary users and avoid or control their interference to the primary users. Therefore, we proposed cognitive beamforming algorithm. DOA estimation, adaptive beamforming and DOA tracking will be considered to accomplish the dynamic cognitive transmission. After the direction angle of each signal has been obtained by the...
In this paper, we propose a new method for evaluating the precision of Kalman filter in video target tracking. Firstly, the performance evaluation model is presented which is different from the usual method that we handle the video. Then the parameter that used to assess the performance of the tracking algorithms is defined and utilized in effective evaluation procedure. In the end, experiments are...
A novel method of dynamic hand gesture recognition based on Speeded Up Robust Features (SURF) tracking is proposed. The main characteristic is that the dominant movement direction of matched SURF points in adjacent frames is used to help describing a hand trajectory without detecting and segmenting the hand region. The dynamic hand gesture is then modeled by a series of trajectory direction data streams...
With the development of wireless Internet, SMS has become a hot spot. Short message service can be divided into two categories: one is information service, and the other is transaction service; which require a real-time system to deal with transactions. When receiving data, this real-time system responds within the stipulated time, and processes data as soon as possible, then sends results to the...
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