论文标题
HPA非线性和智商失衡对混合RF/FSO合作系统的联合影响
On The Joint Effects of HPA Nonlinearities and IQ Imbalance On Mixed RF/FSO Cooperative Systems
论文作者
论文摘要
在这项工作中，我们提供了双跳混合毫米波射频（RF）/自由空间光学（FSO）MIMO继电器系统的框架分析。该源配备了多个天线，并采用共轭光束形成，而目的地由多个带有选择组合的光圈组成。该系统还包括在放大和前向模式下运行的继电器。 RF频道会受到中Nakagami-M的褪色，而光学链路则经历了Málaga分布。此外，我们将损伤引入继电器和接收器。实际上，高功率放大器（HPA）的非线性受损，而接收器遭受相位和正交不平衡的遭受。此外，我们假设两种类型的HPA非线性障碍称为软包膜限制器（SEL）和行动波管放大器（TWTA）。停电概率的封闭形式，位误差概率和厄法德式容量得出。利用这些表演，我们得出了高SNR渐近线，以解开有见地的指标，例如多样性增长。我们还解决了某些关键因素对系统性能的影响，例如损伤，干扰物，天线和孔径的数量以及指向误差等。最后，蒙特卡洛模拟证实了分析表达式。
In this work, we provide a framework analysis of dual-hop hybrid Millimeter Wave Radio Frequency (RF)/Free Space Optical (FSO) MIMO relaying system. The source is equipped with multiple antennas and employs conjugate beamforming while the destination consists of multiple apertures with selection combining. The system also consists of a relay operating at amplify-and-forward mode. The RF channels are subject to Nakagami-m fading while the optical links experience the Málaga distribution. In addition, we introduce the impairments to the relay and receiver. In fact, the relay is impaired by the High Power Amplifier (HPA) nonlinearities while the receiver suffers from the In phase and Quadrature Imbalance. Moreover, we assume two types of HPA nonlinearities impairments called Soft Envelope Limiter (SEL) and Traveling Wave Tube Amplifier (TWTA). Closed-forms of the outage probability, the bit error probability, and the ergodic capacity are derived. Capitalizing on these performances, we derive the high SNR asymptotes to unpack insightful metrics such as the diversity gain. We also address the impacts of some key factors on the system performance such as the impairments, the interferers, the number of antennas and apertures and the pointing errors, etc. Finally, the analytical expressions are confirmed by Monte Carlo simulation.
