适用于5G Massive MIMO通讯系统的宽带高线性度功率放大器研究
结题报告
批准号:
62001525
项目类别:
青年科学基金项目
资助金额:
24.0 万元
负责人:
方小虎
依托单位:
学科分类:
电路与系统
结题年份:
2023
批准年份:
2020
项目状态:
已结题
项目参与者:
方小虎
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中文摘要
为了满足日益增长的移动通信流量需求,5G网络一方面应用多种宽带通信技术增加调制信号的带宽,另一方面应用Massive MIMO技术探索信道在空间的复用。信号带宽的不断增加要求功率放大器支持宽带多信道传输,而Massive MIMO技术则要求发射机中使用多路放大器,这些新的需求急剧增加了应用数字预失真技术进行功放线性化时的附加成本和功耗。针对这些问题,本项目拟研发新的负载调制型放大器技术,在不牺牲效率的前提下,提升放大器在传输宽带、多通带调制信号的线性度,去除发射机系统对于高成本数字预失真技术的依赖。通过分析国内外最新的研究成果并基于申请人在功放设计领域的研究成果,本项目将探索负载调制型功放在回退区的非线性特性的产生机制和主要来源,在此基础之上,研发可用于放大器后端的非线性失真的补偿网络,并进一步研发能够拓展该补偿网络工作带宽的谐波波形控制技术,最终完成对放大器的带宽和线性度等关键指标的提升
英文摘要
Driven by the ever-increasing demand in mobile data throughput, the 5th generation mobile communication system adopts wideband modulated signal formats as well as exploiting space multiplexing by using the Massive MIMO technique. While the increase in signal bandwidth demands the power amplifier (PA) to support broadband and multiband transmission, the Massive MIMO technique demands a new transmitter architecture where a large scale array of PAs are employed in parallel to driven an antenna array with the same size. These new applications of PA significantly increase the cost and power consumption associated with linearization if using digital pre-distortion techniques to sample and linearize each PA element in the Massive MIMO transmitter. Concerning this problem, this proposal aims at investigating a new load-modulated PA technique to improve the PA linearity under wideband communication signals without sacrificing its efficiency. Ultimately, this helps with eliminating the needs of the expensive digital pre-distortion technique. Based on the newest domestic and international research outcomes as well as the related high-performance PA researches done by the applicant, the proposal will investigate and analyze mechanisms that generate nonlinearities in the power back-off region of the high efficiency load-modulated PA. These analyses then guide the development of new linearization methods that utilize the nonlinearity of a deliberately designed combiner network to compensate for the main PA nonlinearity, consequently improving the linearity of the overall PA. Furthermore, we also target developing new waveform engineering techniques that helps to expand the bandwidth over which the enhanced linearity can be maintained. The application of these new techniques, together with the novel linearization methods, ultimately produces wideband and high linearity load-modulated amplifier designs that help to knock down the cost, complexity and power consumption of 5G Massive MIMO transmitter.
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专利列表
DOI:10.1109/TCSII.2023.3291383
发表时间:2023
期刊:IEEE Transactions on Circuits and Systems II: Express Briefs
影响因子:--
作者:Jie Shi;Xiaohu Fang;Hao Yu;Jiangwei Sui;Kwok-Keung M. Cheng
通讯作者:Kwok-Keung M. Cheng
DOI:10.1109/TMTT.2023.3349206
发表时间:2024
期刊:IEEE Transactions on Microwave Theory and Techniques
影响因子:--
作者:Xiaohu Fang;Jie Shi;Changning Wei;Yi Duan;Pai Li;Zhijun Wang
通讯作者:Zhijun Wang
DOI:10.1109/lmwt.2023.3281389
发表时间:2023-08
期刊:IEEE Microwave and Wireless Technology Letters
影响因子:--
作者:Jie Shi;Wenqi Dai;Xiaohu Fang;Xinyue Zhou;Jiangwei Sui;Jing Xia;K. Cheng
通讯作者:Jie Shi;Wenqi Dai;Xiaohu Fang;Xinyue Zhou;Jiangwei Sui;Jing Xia;K. Cheng
DOI:10.1109/tcsii.2023.3305148
发表时间:2024-01
期刊:IEEE Transactions on Circuits and Systems II: Express Briefs
影响因子:--
作者:Jiangwei Sui;Yi‐Feng Cheng;Xiaohu Fang;Du Li;Xiangwei Zhu;Xue-Feng Yuan
通讯作者:Jiangwei Sui;Yi‐Feng Cheng;Xiaohu Fang;Du Li;Xiangwei Zhu;Xue-Feng Yuan
DOI:10.1109/TMTT.2024.3351852
发表时间:2024
期刊:IEEE Transactions on Microwave Theory and Techniques
影响因子:--
作者:Xiaohu Fang;Ruiyuan Chen;Jie Shi
通讯作者:Jie Shi
国内基金
海外基金