65,536-QAM OFDM signal transmission over a fiber-THz system at 320 GHz with delta-sigma modulation

被引：32
作者：
Shi, J. U. N. T. I. N. G. [1 ]
Yu, J. I. A. N. J. U. N. [1 ,2 ]
Zhang, J. I. A. O. [3 ]
Zhu, M. I. N. [3 ]
Zhang, L. O. N. G. [1 ,2 ]
Wang, K. A. I. H. U. I. [1 ,2 ]
Zhou, W. E. N. [1 ,2 ]
Xie, T. A. N. G. Y. A. O. [4 ]
Yu, J. I. A. N. G. U. O. [4 ]
机构：
[1] Fudan Univ, Key Lab Informat Sci Electromagnet Waves MoE, Shanghai 200433, Peoples R China
[2] Purple Mt Labs, Nanjing 211111, Jiangsu, Peoples R China
[3] Southeast Univ, Nanjing 211111, Jiangsu, Peoples R China
[4] Beijing Univ Posts & Telecommun, Beijing 100876, Peoples R China
来源：
OPTICS LETTERS | 2023年 / 48卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Digital television - Digital to analog conversion - Error correction - MIMO systems - Modulators - Orthogonal frequency division multiplexing - Quadrature amplitude modulation - Quantization (signal) - Signal to noise ratio - Single mode fibers - Spectrum efficiency;
D O I：
10.1364/OL.486349
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The transmission of a 65,536-ary quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) signal supported by a hybrid fiber-terahertz (THz) multiple-input multipleoutput(MIMO) system at 320 GHzis experimentally demonstrated in this Letter. We adopt the polarization division multiplexing (PDM) technique to double the spectral efficiency. Based on a 23-GBaud 16-QAM link, 2-bit deltasigma modulation (DSM) quantization enables 65,536-QAM OFDM signal transmission over a 20-km standard singlemode fiber (SSMF) and a 3-m 2x2 MIMO wireless delivery, and satisfies the hard-decision forward error correction (HD-FEC) threshold of 3.8x10(-3), corresponding to a net rate of 60.5 Gbit/s for THz-over-fiber transport. Meanwhile, below the fronthaul error vector magnitude (EVM) threshold of 0.34%, a maximum signal-to-noise ratio (SNR) of 52.6 dB is achieved. To the best of our knowledge, this is the highest modulation order achievable for DSM applications in THz communication.
引用
收藏
页码：2098 / 2101
页数：4
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