In this letter, we study the outage probability of intelligent reflecting surface (IRS) assisted full duplex two-way communication systems, which characterizes the performance of overcoming the transmitted data loss caused by long deep fades. To this end, we first derive the probability distribution of the cascaded end-to-end equivalent channel with an arbitrarily given IRS beamformer. Our analysis shows that deriving such probability distribution in the considered case is more challenging than the case with the phase-matched IRS beamformer. Then, with the derived probability distribution of the equivalent channel, we obtain the closed-form expression of the outage probability performance. It theoretically shows that the reflecting element number has a conspicuous effect on the improvement of the system reliability. Extensive numerical results verify the correctness of the derived results and confirm the superiority of the considered IRS assisted two-way communication system comparing to the one-way counterpart.

翻译：在此信中,我们研究了智能反射表面(IRS)协助的全双双向双向通信系统的失灵概率,这是克服长期深减造成的传输数据损失的性能特点。我们首先从任意获得IRS光束的情况下,得出级联端对端等信道的概率分布。我们的分析表明,在所考虑的案例中,这种概率分布比相配的IRS光谱仪更具有挑战性。然后,随着相应频道的衍生概率分布,我们获得了超速概率性能的封闭式表达方式。从理论上讲,我们从理论上看,反射元数表明,反射元数对系统可靠性的改进具有显著影响。大量的数字结果可以核实所得结果的正确性,并确认所考虑的IRS辅助双向通信系统优于单向对端通信系统。