A secondary fading multiple access channel (S-FMAC) with two transmitters, having random available bandwidth taking values 0 or 1 and one coherent receiver knowing random and independent channel coefficients, has been studied before. In this paper, we investigate the wiretap version of S-FMAC as a secondary multiple access wiretap channel (S-MAC-WT) over similar Rayleigh/ Rayleigh and dissimilar Rayleigh/Nakagami fading, and having briefly reviewed the point to point version, we obtain closed-form expressions for the secrecy rate region and the corresponding outage probability. To validate the theoretical results, secrecy outage probability for sum-rate of S-FMAC-WT is numerically computed.

以前已经研究了具有两个发射机的辅助衰落多址信道（S-FMAC），该发射机具有取值为0或1的随机可用带宽，以及一个知道随机和独立信道系数的相干接收机。在本文中，我们将S-FMAC的窃听版本作为相似的Rayleigh / Rayleigh和不相似的Rayleigh / Nakagami衰落上的辅助多址窃听通道（S-MAC-WT）进行了研究，并简要回顾了点对点版本，获得保密率区域和相应中断概率的封闭式表达式。为了验证理论结果，对S-FMAC-WT求和速率的保密中断概率进行了数值计算。