In this paper, we introduce the probabilistic shaping (PS) technique to the normal (3, 1) vector signal and simulate the generated PS (3, 1) photonic vector signal on an optical transmission system. The PS (3, 1) photonic vector signal is generated by a radio frequency (RF) signal at 12 GHz driving a Mach–Zehnder modulator- (MZM-) based optical carrier suppression (OCS) doubling, and the PS (3, 1) photonic vector signal is not precoding. The PS (3, 1) photonic vector signal and the normal (3, 1) photonic vector signal are used to transmit in 5 km, 10 km, and 20 km single-mode fibers (SMF), respectively. The simulation results demonstrate that the bit error ratio (BER) of the PS (3, 1) vector signal is less than the forward error correction (FEC) threshold of 3.8 10−3, and the BER performance is better than that of the normal (3, 1) vector signal at 4 Gbit/s and 8 Gbit/s transmission rates.

中文翻译：

---

基于概率整形技术的(3, 1)矢量信号无预编码生成

在本文中，我们将概率整形 (PS) 技术引入正常 (3, 1) 矢量信号，并在光传输系统上模拟生成的 PS (3, 1) 光子矢量信号。PS (3, 1) 光子矢量信号由 12 GHz 的射频 (RF) 信号驱动基于 Mach-Zehnder 调制器 (MZM-) 的光载波抑制 (OCS) 倍增产生，而 PS (3, 1 ) 光子矢量信号不是预编码。PS (3, 1) 光子矢量信号和普通 (3, 1) 光子矢量信号分别用于在 5 km、10 km 和 20 km 单模光纤 (SMF) 中传输。仿真结果表明，PS(3, 1)矢量信号的误码率(BER)小于前向纠错(FEC)阈值3.8 10−3，BER性能优于正常的(3,