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一种线性化的全双工MIMO收发器设计

张志亮 沈莹 邵士海 潘文生 唐友喜

引用本文: 张志亮, 沈莹, 邵士海, 潘文生, 唐友喜. 一种线性化的全双工MIMO收发器设计[J]. 电子与信息学报, 2016, 38(9): 2227-2232. doi: 10.11999/JEIT151363 shu
Citation:  ZHANG Zhiliang, SHEN Ying, SHAO Shihai, PAN Wensheng, TANG Youxi. Novel Design of Linear Full-duplex MIMO Radios[J]. Journal of Electronics and Information Technology, 2016, 38(9): 2227-2232. doi: 10.11999/JEIT151363 shu

一种线性化的全双工MIMO收发器设计

摘要: 针对全双工MIMO收发器发射通道非线性以及接收通道存在强烈自干扰的问题,该文提出一种使发射通道线性化并通过射频多抽头重建与数字重建消除自干扰的具有较低硬件成本与软件复杂度的设计方案:(1)基于改进的串扰消除和数字预失真(CTC-DPD)算法并复用反馈通道进行去耦合和数字预失真使发射通道线性化、等增益;(2)在接收通道加入可调衰减器并用多维梯度下降法基于接收的残留自干扰功率最小原则调整抽头参数;(3)基于频域信道估计进行数字自干扰重建。实现的20 MHz带宽LTE全双工22 MIMO通信样机,发射通道经过线性化后带内更平坦,而带外噪声抑制了约30 dB。射频和数字消除一轮调整共耗时约0.17 ms,总消除能力约75 dB。16QAM映射时全双工双向数据速率总和220 Mbps,相对单向时的110 Mbps实现了频谱效率的翻倍。通信样机证明了该方案的可行性。

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  • 收稿日期:  2015-12-03
  • 录用日期:  2016-03-21
  • 刊出日期:  2016-09-19
通讯作者: 陈斌, bchen63@163.com
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