Tao Li, Lu Qichao, Li Renjie, Wang Zhili, Cheng Tong, Yu Ying, Huang Wei
National Key Laboratory of Electromagnetic Effect and Security on Marine Equipment, China Ship Development and Design Centre, Wuhan, China.
Heliyon. 2024 Jun 8;10(12):e32684. doi: 10.1016/j.heliyon.2024.e32684. eCollection 2024 Jun 30.
W-band (75-110 GHz) is a potential radio frequency band to provide long-distance wireless links for mobile data transmission. This paper proposes and experimentally demonstrates high-speed wireless transmission at W-band using photonics-aided method, including optical heterodyne, photonics-aided down-conversion without RF oscillator and coherent detection. A comparison between the photonics-aided method and the conventional electronic method employing solid-state electronic devices is conducted for the first time. The photonics-aided method is shown to offer advantages such as lower harmonic components, spur, reduced nonlinearity, and no local oscillator leakage, results in a 2.5 dB better performance of the photonic-aided W-band mm-wave transmitter compared to the electronic one. In the terms of receiver, the photonics-aided method can surpass the electronic method, with the help of larger electro-optical modulator bandwidth and lower drive voltage in the photonic down-conversion stage. Ultimately, using the photonics-aided method, a recorded equivalent transmission distance of 29 km@84 GHz and 45km@75.6GHz is achieved respectively for 1Gbaud QPSK signal.
W波段（75 - 110吉赫兹）是一个有潜力的射频频段，可用于为移动数据传输提供长距离无线链路。本文提出并通过实验演示了使用光子辅助方法在W波段进行高速无线传输，包括光外差、无射频振荡器的光子辅助下变频以及相干检测。首次对光子辅助方法与采用固态电子器件的传统电子方法进行了比较。结果表明，光子辅助方法具有诸如更低的谐波分量、杂散、更低的非线性以及无本地振荡器泄漏等优点，使得光子辅助的W波段毫米波发射机相比电子发射机性能提升了2.5分贝。在接收机方面，借助光子下变频阶段更大的电光调制器带宽和更低的驱动电压，光子辅助方法能够超越电子方法。最终，使用光子辅助方法，对于1Gbaud的QPSK信号，分别实现了在84吉赫兹时29千米和在75.6吉赫兹时45千米的记录等效传输距离。
