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Feature reduction is one of the core technologies of automatic text categorization. As for the scatter difference criterion, poor categorization effect is made when the between-class distance is small and the class density is high. In order to solve this problem, a weighted method based on the sample distribution is shown in the paper, which will make the(More)
This paper presents a Kalman-filter-based method, to track the direction-of-arrival (DOA) of a moving target using antenna array in mobile communications. There are two major new features about the proposed scheme. Firstly, traditional Kalman filter needs measurement transformed. However, it is difficult and costly to be obtained. And our method could work(More)
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