论文标题
智能反射表面辅助诺玛网络的性能分析
Performance Analysis of Intelligent Reflecting Surface Assisted NOMA Networks
论文作者
论文摘要
智能反射表面（IRS）是一项有前途的技术，可以增强无线网络的覆盖范围和性能。我们考虑将IRS应用于非正交的多重访问（NOMA），其中基站通过IRS将超级信号传输给多个用户。通过调用1位编码方案，研究了具有不完善的连续干扰取消（IPSIC）和完美连续的干扰取消（PSIC）的IRS辅助NOMA网络的性能。特别是，我们为使用IPSIC/PSIC的M-th用户的停电概率和偏僻率率提供了新的精确和渐近表达式。基于分析结果，使用PSIC的M-th用户的多样性顺序与反射元素和频道排序的数量有关。获得$ M $ TH用户的厄尔及性速率的高信号到噪声无线电（SNR）。 IRS-NOMA的非正交用户的吞吐量和能源效率都以延迟限制和耐延迟的传输模式进行了讨论。此外，我们得出了IRS辅助正交多访问（IRS-SOMA）的新现有表达式和厄贡率的新精确表达式。给出了数值结果以证实我们的分析并证明：i）IRS-NOMA的中断行为优于IRS-soma和继电器方案； ii）随着反射元件的数量增加，IRS-NOMA能够达到冲突性能的增强； iii）与IRS-soma和基准相比，M-th用户具有更大的辉煌率。但是，$ m $ TH的用户的厄运性能超过了低SNR制度中的中继方案。
Intelligent reflecting surface (IRS) is a promising technology to enhance the coverage and performance of wireless networks. We consider the application of IRS to non-orthogonal multiple access (NOMA), where a base station transmits superposed signals to multiple users by the virtue of an IRS. The performance of an IRS-assisted NOMA networks with imperfect successive interference cancellation (ipSIC) and perfect successive interference cancellation (pSIC) is investigated by invoking 1-bit coding scheme. In particular, we derive new exact and asymptotic expressions for both outage probability and ergodic rate of the m-th user with ipSIC/pSIC. Based on analytical results, the diversity order of the m-th user with pSIC is in connection with the number of reflecting elements and channel ordering. The high signal-to-noise radio (SNR) slope of ergodic rate for the $m$-th user is obtained. The throughput and energy efficiency of non-orthogonal users for IRS-NOMA are discussed both in delay-limited and delay-tolerant transmission modes. Additionally, we derive new exact expressions of outage probability and ergodic rate for IRS-assisted orthogonal multiple access (IRS-OMA). Numerical results are presented to substantiate our analyses and demonstrate that: i) The outage behaviors of IRS-NOMA are superior to that of IRS-OMA and relaying schemes; ii) With increasing the number of reflecting elements, IRS-NOMA is capable of achieving enhanced outage performance; and iii) The M-th user has a larger ergodic rate compared to IRS-OMA and benchmarks. However, the ergodic performance of the $m$-th user exceeds relaying schemes in the low SNR regime.
