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Antenna selection technology in MIMO diversity system can achieve almost the same diversity gain as omni-directional antenna without increasing the radio frequency link in system. Several drawbacks exist in commonly used diversity reception method since it only considers the intensity fading of signal rather than content analysis and comparison of signal. In this paper, we study the current wireless...
With the extending of the data mining application domain, the research of the privacy preserving data mining technique becomes more and more important. Privacy preserving classified data mining which is the main type of the privacy protection data mining has already become one of the hot spots in the field of data mining in recent years. How to transform the primitive real data and then structure...
According to the system requirements, the multicarrier OFDM transmission scheme was proposed in intra-flight data link (IFDL) physical layer. Considering the anti-jamming vulnerability, the reliabilities of OFDM system were quantitatively analyzed under several burst interference. Combined with the convolution interleaving, (255,223)RS-(2,1,7) convolution concatenated coding that was proposed originally...
As XML has become the standard of data exchange and express of Internet and e-commerce, it is being more and more widely used, while XML is a kind of self-described language, with a large number of redundant structural information, so that is the hot study now on how to use XML data stream to be reasonable and efficient. The existing compression techniques of XML require two-pass scan on data, which...
Analog transmission has the advantage of allowing the quality of recovered data to vary gracefully as the channel conditions vary. For the purpose of robust image communication, two analog error-control coding schemes based on dimension-expanding Shannon mapping are discussed in this paper, including the encoding processes, decoding processes and joint source channel optimizing design methods. In...
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