Orthogonal variable spreading factor encoded unmanned aerial vehicle-assisted nonorthogonal multiple access system with hybrid physical layer security
Physical layer security (PLS) can improve the security of both terrestrial and nonterrestrial wireless communication networks.This study proposes a simplified framework for nonterrestrial cyclic prefixed orthogonal variable spreading factor (OVSF)-encoded multiple-input and multiple-output nonorthogonal multiple Pentair GloBrite Parts access (NOMA)