一种矢量毫米波信号的几何成形性能分析  

Analysis of Geometric Shaping Performance of a Vector Millimeter Wave Signal

作　　者：刘君 赵峰 孟佳欣 魏怡 姜长鹏 王凡允 Liu Jun;Zhao Feng;Meng Jiaxin;Wei Yi;Jiang Changpeng;Wang Fanyun(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Shaanxi,Xi’an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121

出　　处：《激光与光电子学进展》2021年第23期55-63,共9页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61875164)。

摘　　要：基于单个推挽调制器产生矢量毫米波信号的光路方案,结合几何成形技术,研究了8PSK/GS-8PSK和8QAM/GS-8QAM调制格式下8/16-Gbaud 80 GHz的矢量毫米波信号的传输性能。结果表明,与传统调制格式相比,几何成形后的信号在背靠背和光纤传输条件下的误码率与光功率均有明显的改善,8-Gbaud GS-8PSK信号经过150 km光纤传输后,光功率约有1 dBm的提升;16-Gbaud GS-8QAM调制信号经过背靠背和80 km光纤传输后,光功率约有0.5 dBm的改善。Photonic-aided millimeter-wave communication combines the advantages of optical fiber and wireless communications,and it has several applications in the next generation of wireless access network systems.Geometric shaping(GS) technology can effectively overcome the signal damage caused by the transmission channel’s nonlinear effect through optimising the Euclidean distance between the constellations and can effectively improve system transmission capacity and spectrum efficiency without increasing the system hardware costs.The transmission performance of 8/16-Gbaud 80-GHz vector millimeter-wave signal in the modulation formats of 8 PSK/GS-8 PSK and 8 QAM/GS-8 QAM is studied using an optical link scheme that uses a single push-pull modulator to generate vector millimeter-wave signal,combined with GS technology.The results show that when compared with traditional modulation formats,the geometrically shaped signal has a considerable improvement in the bit error rate and optical power under back-to-back and optical fiber transmission conditions.After transmitting an 8-Gbaud GS-8 PSK signal through 150 km optical fiber,the optical power is increased by approximately 1 dBm;after transmitting a 16-Gbaud GS-8 QAM modulated signal through back-to-back and 80 km optical fiber,the optical power is increased by approximately 0.5 dBm.

关 键 词：光通信 矢量毫米波 几何成形 互信息 推挽调制器 单边带调制 

分 类 号：TN928[电子电信—通信与信息系统]