论文标题
使用RIS辅助源和继电器对解码和前向继电器网络的干扰影响
Interference Impact on Decode-and-Forward Relay Networks with RIS-Assisted Source and Relays
论文作者
论文摘要
在这封信中，我们考虑了具有可重新配置的智能表面（RIS）辅助源的解码和前向继电器网络的场景，并在存在干扰的情况下进行了继电器。假设瑞利褪色通道和机会性继电器方案，我们为系统中断概率得出近似闭合形式的表达。此外，我们以高信噪比（SNR）制度研究了系统行为，在该制度中，获得并分析了多样性顺序和编码增益。结果表明，系统可以达到gd = min（n1，n2）k的多样性顺序，其中n1和n2分别是源和继电器上反射元素的数量，而k是继电器的数量。此外，研究结果表明，对于相同的多样性顺序，利用一个带有多个反射元素的继电器比使用单个反射元件的多个继电器具有更好的性能。此外，发现表明，目的地的干扰对系统性能比中继的干扰更为严重。因此，在相同的干扰力和固定数量的继电器k下，结果表明，与N2 <n1相比，第一个跳跃主导性能N1 <n2的情况在编码增益方面给出了更好的结果。
In this letter, we consider the scenario of decode-and-forward relay network with reconfigurable intelligent surface (RIS)-assisted source and relays in the presence of interference. We derive approximate closed-form expression for the system outage probability assuming Rayleigh fading channels and opportunistic relaying scheme. In addition, we study the system behavior at the high signal-to-noise ratio (SNR) regime, where the diversity order and coding gain are obtained and analyzed. The results show that the system can achieve a diversity order of Gd = min(N1,N2)K, where N1 and N2 are the numbers of reflecting elements at the source and relays, respectively, and K is the number of relays. In addition, findings illustrate that for the same diversity order, utilizing one relay with multiple reflecting elements gives better performance than utilizing multiple relays with a single reflecting element. Furthermore, findings illustrate that the interference at the destination is more severe on the system performance than the interference at the relays. Therefore, under the same interference powers and for a fixed number of relays K, results show that the case where the first hop is dominating the performance N1 < N2 gives better results in terms of coding gain than the case where N2 < N1.
