Hybrid Linearization of Broadband Radio-Over-Fiber Transmission

被引:10
|
作者
Xie, Xiaoran [1 ]
Hui, Ming [2 ]
Liu, Taijun [3 ]
Zhang, Xiupu [1 ]
机构
[1] Concordia Univ, Dept Elect & Comp Engn, iPhoton Labs, Montreal, PQ H3G 1M8, Canada
[2] Nanyang Normal Univ, Coll Phys & Elect Engn, Nanyang 473061, Peoples R China
[3] Ningbo Univ, Sch Informat Sci & Engn, Ningbo 315211, Zhejiang, Peoples R China
基金
加拿大自然科学与工程研究理事会;
关键词
Broadband digital predistortion; linearization; LTE; multiband; nonlinearity; radio-over-fiber systems; 5G; BEHAVIORAL-MODEL; PREDISTORTION;
D O I
10.1109/LPT.2018.2812745
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This letter presents analog and digital pre-distortion hybrid linearization of a broadband radio-over-fiber transmission system. Analog pre-distortion (APD) is used to mainly compensate for out-of-band nonlinear distortion, and digital predistortion (DPD) is used to mainly compensate for in-band nonlinear distortion and memory effect. Thus, by combining APD and DPD, all the quiescent distortions and memory effect can be suppressed effectively. The hybrid APD and DPD linearization is evaluated in three different scenarios: two 20-MHz long-term evolution (LTE) signals located at 800 and 900 MHz, and located at 800 and 840 MHz, and three 20-MHz LTE signals located at 800, 850, and 900 MHz. All three experiments show that the hybrid linearization results in better improvement in error vector magnitude, adjacent-channel power ratio, and third-order intermodulation distortion than the APD-only and DPD-only.
引用
收藏
页码:692 / 695
页数:4
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