![Symmetry | Free Full-Text | Relaxation of the Radio-Frequency Linewidth for Coherent-Optical Orthogonal Frequency-Division Multiplexing Schemes by Employing the Improved Extreme Learning Machine Symmetry | Free Full-Text | Relaxation of the Radio-Frequency Linewidth for Coherent-Optical Orthogonal Frequency-Division Multiplexing Schemes by Employing the Improved Extreme Learning Machine](https://www.mdpi.com/symmetry/symmetry-12-00632/article_deploy/html/images/symmetry-12-00632-g001.png)
Symmetry | Free Full-Text | Relaxation of the Radio-Frequency Linewidth for Coherent-Optical Orthogonal Frequency-Division Multiplexing Schemes by Employing the Improved Extreme Learning Machine
![Performance of 32-QAM. (a) Time-reversal communications signal received... | Download Scientific Diagram Performance of 32-QAM. (a) Time-reversal communications signal received... | Download Scientific Diagram](https://www.researchgate.net/publication/3232206/figure/fig7/AS:651874076221440@1532430299174/Performance-of-32-QAM-a-Time-reversal-communications-signal-received-on-the-VRA-The.png)
Performance of 32-QAM. (a) Time-reversal communications signal received... | Download Scientific Diagram
![Sensors | Free Full-Text | Towards 100 Gbps over 100 km: System Design and Demonstration of E-Band Millimeter Wave Communication Sensors | Free Full-Text | Towards 100 Gbps over 100 km: System Design and Demonstration of E-Band Millimeter Wave Communication](https://pub.mdpi-res.com/sensors/sensors-22-09514/article_deploy/html/images/sensors-22-09514-g001-550.jpg?1670403856)