Q-Band MMW Transmission Enabled by Joint Probabilistic Shaping and Precoding With MZM-Based OCS Modulation

• Published in: IEEE photonics journal Vol. 15; no. 4; pp. 1 - 5
• Main Authors: Yan, Hengxin, Bi, Jiaohao, Guo, Dong, Li, Xinying, Pan, Xiaolong, Ge, Hongwu, Wu, Wei, Yu, Chao, Xin, Xiangjun, Zhang, Qi, Gao, Ran, Yao, Haipeng, Dong, Ze, Li, Zhipei, Chang, Huan, Zhou, Sitong
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.08.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Error correction; Interference; Mach-Zehnder interferometers; Millimeter waves; Millimeter-wave (MMW); Modulation; Optical transmitters; Precoding; probabilistic shaping (PS); Quadrature amplitude modulation; Quadratures; radio-over-fiber (RoF); RF signals; Signal generation; Signal to noise ratio; Stimulated emission; Symbols
• ISSN: 1943-0655; 1943-0655; 1943-0647
• DOI: 10.1109/JPHOT.2023.3269560

In this letter, we propose a novel and straightforward scheme for Q-band (33-50 GHz) millimeter-wave signal generation enabled by a Mach-Zehnder modulator (MZM)-based joint algorithm, which combines probabilistic shaping (PS) and precoding technology, to enhance the anti-interference ability of the transmission system. Based on the proposed scheme, we experimentally demonstrate the generation and transmission of 1.4-Gbaud 46-GHz PS-16-quadrature-amplitude-modulation (PS-16QAM) vector signals, showcasing improved bit-error-ratio (BER) in both standard single-mode fiber (SSMF) and wireless transmission cases. The proposed scheme exhibits a clear advantage in terms of nonlinear interference suppression and satisfies the hard-decision forward-error-correction (HD-FEC) threshold with a BER of 3.8 × 10 −3 in radio-over-fiber (RoF) systems.