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The actual meshing state of Planetary Roller Screw will change, then the pre-setting meshing state could not be ensured and backlash or pre-tightening will appear, when the sizes of the tooth figure vary with the manufacture error. Therefore, a vector method is proposed to quantify meshing state of planetary roller screw, in order to precisely describe the meshing state. Using the relative position...
Non-contiguous orthogonal frequency division multiplexing (NC-OFDM) system is used in the wide-band communications, especially for the wide-band cognitive radio, e. g., IEEE 802.22. However, in the high speed mobile environment, NC-OFDM suffers from inter-carrier interference (ICI). Due to the non-uniformed Doppler spread in the wide-band, it is not efficient to use the traditional ICI cancelation...
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