Secrecy Outage Performance Analysis for Cooperative NOMA Over Nakagami-m Channel Yu, Chao ; Ko, Hak-Lim ; Peng, Xin ; Xie, Wenwu Abstract Publication: IEEE Access Pub Date: 2019 DOI: 10.1109/ACCESS.2019.2923450 Bibcode: 2019IEEEA...779866Y