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In the MIMO-OFDM system channel estimation based on the superimposed pilot is one of most potential and powerful techniques for broad-band wireless communications. In most traditional algorithms, the channel parameters are estimated by calculating the first-order statistical properties of receiving information. However, there are some limitations in such methods. These methods require the first-order...
The measure system in power plant based on Orthogonal frequency division multiplexing technology was put forward after the signal sources are described firstly, connected with communication and monitoring networks existed already. In this system, wireless sensor networks or carrier transmission on power line or fiber-optic is used in fully mechanized working face and electric power line systems is...
Geology circumstance of mine seam is extremely complicated and there are many hidden trouble. After analyzed the existing current problems underground mine communication system, a kind of comprehensive information communication system based on the multicarrier modulation technology was designed. This system makes wire communication combined mutually with wireless communication by tandem adapter. In...
The electromagnetic environment of the main features in power plants is analyzed, and then the communication system based on OFDM technology was put forward in this paper, the way of selection the wavelet bases function to pass the signal communication system is discussed in the last. The system uses OFDM technology to remove the signal noise in which the cosine carriers of the conventional OFDM system...
The power plant communication system based on Orthogonal frequency division multiplexing technology was put forward, connected with communication and monitoring networks existed already, in which the cosine carriers of the conventional OFDM system are replaced by the multi-scale orthogonal wavelets transformation. In this system, wireless sensor networks or carrier transmission on low voltage power...
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