Joint Linearization for Radio-over-Fiber Links Equipped With High Power Amplifiers

被引：0
|
作者：
Lozhkin, Alexander N. [1 ]
Nagatani, Kazuo [1 ]
Oishi, Yasuyuki [1 ]
机构：
[1] Fujitsu Labs Ltd, KSP, 3-2-1 Sakado, Kawasaki, Kanagawa 2130012, Japan
来源：
2016 IEEE 83RD VEHICULAR TECHNOLOGY CONFERENCE (VTC SPRING) | 2016年
关键词：
radio-over-fiber; linearization; power amplifier;
D O I：
10.1109/VTCSpring.2016.7504309
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：
In this study, we experimentally investigated the adjacent channel leakage ratio (ACLR) performance degradation for the output signal of the RF HPA equipped with the adaptive linearization caused by RoF links placed in both direct and feedback paths of the transmitting system. We show that ACLR exceeding 57 dBc @ 5 MHz offset, which completely satisfy the requirement defined in the 3GPP technical specification, can be achieved for a 20 W class Doherty power amplifier linearized through 1 km fiber with commercial RoF links. With the experimental results, we show that the achieved ACLR strongly depends on the RoF link noise figure; meanwhile most of the nonlinear distortions caused by RoF can be successively suppressed with the proposed joint linearization approach.
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页数：6
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