Z.ZHENG is supported by the National Natural Science Foundation of China(No.61901033);the Natural Science Foundation of Beijing(No.L212031);X.Y.BAO is supported by the China Academy of Information and Communications Technology,Y.Z.HUANG is supported by the National Natural Science Foundation of China(No.61971474);the Beijing Nova Program(No.Z201100006820121)。
In this paper,physical layer security techniques are investigated for cooperative multi-input multi-output(C-MIMO),which operates as an underlaid cognitive radio system that coexists with a primary user(PU).The underl...