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In this paper, a diplexer with high isolation and out-of-band rejection is proposed. In the working band 1.5 GHz to 3.0 GHz, two transmission bands with bandwidth 30 and 22 MHz center at 1.95 and 2.12 GHz separately are realized. In each single path, a special section which not directly connects to “T” structure and the terminal port to let signals coupling twice before transmitting to the terminal...
Image fusion involves merging two or more images into a single image with more details and information. Recently, multiscale transform approaches are very useful for analyzing the information content of images for the purpose of fusion. The nonsubsampled contourlet transform (NSCT) can provide a flexible multiscale, multidirection, and shift-invariant image decomposition for image. In order to compose...
To achieve high resolution in frequency measurement, an depth analyzing of the group phase relationship between two signals with different frequencies is done, on which an ultrahigh resolution measurement scheme by detecting the optimal group phase coincidence is presented. The method is implemented on a CPLD chip, and the actual measurement data of the prototype shows that its resolution is approximately...
In this paper, we study the problem of anomaly detection in high-dimensional network streams. We have developed a new technique, called Stream Projected Outlier deTector (SPOT), to deal with the problem of anomaly detection from high-dimensional data streams. We conduct a case study of SPOT in this paper by deploying it on 1999 KDD Intrusion Detection application. Innovative approaches for training...
We have researched, developed and applied a series of measuring and testing technologies in the mass production and exploitation of precision frequency control devices including OCXO, TCXO, VCXO, PLL and clock modules. They have shown a key function to the performance improvement and quality guarantee of the products. In this paper we shall present turn point regulation technology and equipment of...
For higher phase lock precision, a new principle, the equivalent phase comparison frequency (EPCF) between signals in different frequencies, is presented in this paper. Using the new PLL based on EPCF, higher phase comparison and phase lock precision can be achieved with simple electrical circuits. Evidently, this principle is based on the analysis of time and phase, rather than on frequency simply...
The short time-interval and frequency measurement are main research projects in the measurement of time and frequency. Traditional measurement methods include direct counting, analog interpolating, time-to-voltage conversion, time vernier and time-to-digital conversion. However these methods are all complicated and the instruments based on these methods are expensive. A novel method for short time-interval...
Equivalent phase comparison frequency (EPCF) is an important parameter between two frequency signals, and it shows their phase correlation. It is much higher than anyone of the two frequencies, and its period is equal to the group phase shift corresponding two most adjacent phase coincidences between the signals. For example, to two frequency signals with several MHz frequency, their EPCF can be several...
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