Journal on Communications ›› 2019, Vol. 40 ›› Issue (10): 30-41.doi: 10.11959/j.issn.1000-436x.2019211

• Papers • Previous Articles     Next Articles

Research on space focusing virtual coverage based on orthogonal frequency time reversal method

Yifang NIE1,2,3, Fangwei LI1,2()   

  1. 1 School of Communication and Information Engineering,Chongqing University of Posts &Telecommunications,Chongqing 400065,China
    2 Chongqing Key Laboratory of Mobile Communications,Chongqing University of Posts &Telecommunications,Chongqing 400065,China
    3 College of Environment and Resources,Chongqing Technology &Business University,Chongqing 400067,China
  • Revised:2019-08-21 Online:2019-10-25 Published:2019-11-07
  • Supported by:
    The National Natural Science Foundation of China(61771084);The National Natural Science Foundation of China(61102062);The National Natural Science Foundation of China(61271260);Technological Research Project of Chongqing Municipal Education Commission(KJQN201800834)

Abstract:

To solve the problem of information leakage and coverage efficiency in ultra-dense wireless network,the orthogonal frequency-time reversal virtual coverage scheme was proposed.At first,different wireless reversal channels with lower correlation were distinguished by orthogonal carries.Next,after time reversal,the space focusing of each target signal was realized around the terminal.Then,theoretical expressions of the signal coverage and the signal-interference-to-noise ratio were derived and proved.Ultimately,the virtual coverage was shaped,meeting the requirements of users.The coverage of unrelated user not belonging to system was reduced.The results show that those unrelated users are difficult to receive the target signal because of virtual coverage.In addition,the system has higher capacity and security rate of reliable transmission without any more power or antennas.

Key words: wireless ultra-dense network, reliable transmission, orthogonal frequency time reversal, virtual coverage

CLC Number: 

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