Nonlinearity-aware optoelectronic terahertz discrete multitone signal transmission with a zero-bias diode.
Nonlinearity-aware optoelectronic terahertz discrete multitone signal transmission with a zero-bias diode.
复制标题
DOI：
10.1364/ol.401414
复制
发表时间：
2020-09
期刊：
影响因子：
3.6
通讯作者：
Lu Zhang;Mengyao Qiao;Shiwei Wang;Zijie Lu;Le Zhang;X. Pang;Xianmin Zhang;Xianbin Yu
中科院分区：
文献类型：
--
作者：
Lu Zhang;Mengyao Qiao;Shiwei Wang;Zijie Lu;Le Zhang;X. Pang;Xianmin Zhang;Xianbin Yu
太赫兹波段已被认为是支持未来速率贪婪应用（如6 G通信）的有希望的候选者。太赫兹光通信有利于实现高速传输。在这封信中，我们提出并实验证明了一个光电太赫兹传输系统的强度调制和直接检测，其中使用离散多音（DMT）波形与高阶正交幅度调制（QAM）。零偏置二极管（ZBD）被用于系统中作为一个简单的，具有成本效益的直接检测太赫兹接收器。提出了一种非线性感知的数字信号接收程序，以减轻由ZBD的子载波到子载波差拍干扰引起的非线性损伤。在该实验中，高达60 Gbit/s的线速率16 QAM-DMT信号被成功地传输在310 GHz频段的3 m无线链路上，并与非线性感知信号处理例程的平均信噪比提高了3 dB。这种方案的优点使其成为太赫兹无线通信的一种有前途的解决方案。
The terahertz band has been recognized as a promising candidate to support future rate-greedy applications such as 6G communications. Optoelectronic terahertz communications are beneficial for the realization of high-speed transmission. In this Letter, we propose and experimentally demonstrate an optoelectronic terahertz transmission system with intensity modulation and direct detection, where a discrete multitone (DMT) waveform with high-order quadrature amplitude modulation (QAM) is used. A zero-bias diode (ZBD) is used in the system as a simple, cost-effective direct detection terahertz receiver. A nonlinearity-aware digital signal reception routine is proposed to mitigate the nonlinear impairments induced by subcarrier-to-subcarrier beating interference from the ZBD. In this experiment, up to a 60 Gbit/s line rate 16QAM-DMT signal is successfully transmitted over a 3 m wireless link in the 310 GHz band, and the mean signal-to-noise ratio is improved by 3 dB with nonlinearity-aware signal processing routine. The advantageous features of such a scheme make it a promising solution for terahertz wireless communications.