Phase Noise Effects on the Performance of High-Order Digital Modulation Terahertz Communication System  

作　　者：DENG Xianjin YANG Hao WU Qiuyu JIANG Jun LIN Changxing 

机构地区：[1]Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621900,China [2]Microsystem and Terahertz Research Center,China Academy of Engineering Physics,Chengdu 610200,China

出　　处：《Chinese Journal of Electronics》2022年第3期589-594,共6页电子学报（英文版）

摘　　要：As the carrier frequency goes into the terahertz band, the phase noise of the signal source has increasing impacts on the performance of the communication system. Considering a 16 QAM high-order digital modulation terahertz communication system(DMTCS),by comparing the influence of two kinds of local oscillator signal sources with different phase noise characteristics on the bit error rate(BER) performance of the system based on theoretical analysis and experimental research, it is found that the near-end phase noise of local oscillator signal source has a great influence on the BER performance of the DMTCS. The suppression of phase noise of the local oscillator signal source based on choosing loop bandwidth of the digital phase-locked loop(DPLL) at the receiving end is also discussed. It is found that the negative impacts of phase noise on BER performance of the system can be efficiently decreased by reasonably selecting the loop bandwidth of the DPLL.

关 键 词：Phase noise High-order digital modulation Terahertz communication 

分 类 号：TN92[电子电信—通信与信息系统] TN911.3[电子电信—信息与通信工程]