National Key R&D Program of China(Grant No.2018YFB1801102);Jiangxi Key R&D Program(Grant No.20181ACE50028);National Natural Science Foundation of China(Grant No.61701301);Open Research Project of State Key Laboratory of Integrated Services Networks(Xidian University)(Grant No.ISN20-03);Shanghai Key Laboratory of Digital Media Processing and Transmission(Grant No.STCSM18DZ2270700);National Natural Science Foundation of China(Grant No.61931019);Shanghai Key Laboratory of Digital Media Processing and Transmission(Grant No.STCSM18DZ2270700).
In cell-free massive multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(OFDM)systems,user equipments(UEs)are served by many distributed access points(APs),where channels are correlated owin...