We consider in this paper the scenario of reconfigurable intelligent surface (RIS) source decode-and-forward (DF) relaying network with interference. The system includes single source of multiple reflecting elements, multiple DF relays, and single destination with interference at the relays and destination. Assuming Rayleigh fading channels, we obtain closed-form accurate approximations for the outage probability. Additionally, we investigate the behavior at high signal-to-noise ratio (SNR) values where the diversity order and the coding gain are obtained. Findings illustrate that the number of reflecting elements $N$ at the source has a small impact on the system coding gain and not on the diversity gain. Furthermore, results show that the number of relays $K$ is affecting the diversity order and is more impactful on the behavior than $N$. Findings demonstrate that when $N=1$, the interference value at the relays and destination is determining, which hop dominates the behavior, whereas when $N>1$ the behavior is always dominated by the second hop regardless of the interference value.

我们在本文中考虑了具有干扰的可重构智能表面（RIS）源解码转发（DF）中继网络的场景。该系统包括多个反射元件的单一源，多个DF中继器以及在中继器和目的地受到干扰的单个目的地。假设瑞利衰落信道，我们可以得出断电概率的闭式精确近似值。此外，我们研究了在高信噪比（SNR）值下的行为，其中获得了分集阶数和编码增益。调查结果表明，反映要素的数量$ñ$在源头上对系统编码增益的影响很小，而对分集增益的影响很小。此外，结果表明继电器的数量$ķ$ 正在影响多样性秩序，并且对行为的影响比 $ñ$。结果表明，何时$ñ=\mathrm{1个}$，则中继站和目标站的干扰值正在确定，而该跃点占主导地位，而当 $ñ>\mathrm{1个}$ 无论干扰值如何，该行为始终由第二跳控制。