Graduate Institute of Applied Science and Engineering;
Fu Jen Catholic University;
New Taipei City 24205;
Taiwan;
China;
The State Key Laboratory of Integrated Services Networks;
Xidian University;
Xian 710071;
China;
School of Network Education;
Beijing University of Posts and Telecommunications;
Beijing 100876;
China;
College of Physics and Information Engineering;
Quanzhou Normal University;
Quanzhou 362000;
China;
Department of Electrical Engineering;
Fu Jen Catholic University;
New Taipei City 24205;
Taiwan;
China;
OFDM; MIMO; virtual; carrier; channel; identification; Cholesky; factorization;