In this work, we presented a radio-over-fiber (ROF) access network through two modulation stages for the generation of multiple millimeter wave (mm-wave) signals with frequencies of 20, 40, 60 and 80 GHz for the transmission rate of 10 Gbps as a function of the variation of link distance and signal power. The specific purpose of the paper was to design and to investigate a RoF system based on the variation of mm-wave frequencies in order to implement a simple and effective system. In stage 1, there are two modulators in parallel (MZM_a and MZM_b) called dual-parallel Mach–Zehnder modulator (DP-MZM) and in stage 2 there is only one modulator (MZM_d), connected to three pulse generators: Non-Return-to-Zero (NRZ), Return-to-Zero (RZ) and Gaussian, which were selected individually to each simulation in optisystem software. A single-mode fiber (SMF) and optical filter Gaussian (GOF) and an erbium-doped fiber amplifier (EDFA) were also used to send signals to base stations (BSs). The numerical analyzes of the results of the eye diagrams showed excellent bit error rate (BER) and quality factor (Q-factor) values, which proved the good performance of the proposed RoF- DP-MZM system, for the three encoding formats used, which was able to generate 3-tupling mm-wave for multiple wireless accesses.

在这项工作中，我们提出了通过两个调制级的光纤无线电（ROF）接入网络，用于产生频率为20、40、60和80 GHz的多毫米波（mm-wave）信号， 10 Gbps是链路距离和信号功率变化的函数。本文的特定目的是设计和研究基于毫米波频率变化的RoF系统，以实现简单有效的系统。在阶段1中，有两个并行的调制器（MZM _a和MZM _b）称为双并行马赫曾德尔调制器（DP-MZM），在阶段2中，只有一个调制器（MZM _d），连接到三个脉冲发生器：非归零（NRZ），归零（RZ）和高斯，这是在optisystem软件中为每个模拟分别选择的。单模光纤（SMF）和光学滤波器高斯（GOF）以及掺b光纤放大器（EDFA）也用于向基站（BS）发送信号。眼图结果的数值分析显示出出色的误码率（BER）和品质因数（Q-factor）值，证明了所提出的RoF-DP-MZM系统对于所使用的三种编码格式均具有良好的性能，能够产生3倍的毫米波，以进行多种无线访问。