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时间异步全双工数字域分段卷积自干扰抑制技术

李彤 沈莹 潘文生 邵士海 唐友喜

李彤, 沈莹, 潘文生, 邵士海, 唐友喜. 时间异步全双工数字域分段卷积自干扰抑制技术[J]. 电子与信息学报, 2022, 44(4): 1395-1401. doi: 10.11999/JEIT210024
引用本文: 李彤, 沈莹, 潘文生, 邵士海, 唐友喜. 时间异步全双工数字域分段卷积自干扰抑制技术[J]. 电子与信息学报, 2022, 44(4): 1395-1401. doi: 10.11999/JEIT210024
LI Tong, SHEN Ying, PAN Wensheng, SHAO Shihai, TANG Youxi. A Timing Asynchronous Full Duplex Digital Self-interference Suppression Method by Segment Convolution[J]. Journal of Electronics & Information Technology, 2022, 44(4): 1395-1401. doi: 10.11999/JEIT210024
Citation: LI Tong, SHEN Ying, PAN Wensheng, SHAO Shihai, TANG Youxi. A Timing Asynchronous Full Duplex Digital Self-interference Suppression Method by Segment Convolution[J]. Journal of Electronics & Information Technology, 2022, 44(4): 1395-1401. doi: 10.11999/JEIT210024

时间异步全双工数字域分段卷积自干扰抑制技术

doi: 10.11999/JEIT210024
基金项目: 国家自然科学基金(U19B2014, 61771107, 62071094, 61701075, 61601064, 61531009);国家重点研发计划(2018YFB1801903);四川省科技项目(2020YFH0101)
详细信息
    作者简介:

    李彤:女,1996年生,博士生,研究方向为无线通信信号处理、通信抗干扰技术等

    沈莹:男,1980年生,副教授,研究方向为无线通信信号处理、通信抗干扰技术等

    潘文生:男,1975年生,副研究员,研究方向为射频线性化技术、全双工通信技术

    邵士海:男,1980年生,教授,博士生导师,研究方向为无线通信信号处理、抗干扰与安全通信等

    唐友喜:男,1964年生,教授,博士生导师,研究方向为无线通信中的数字信号处理

    通讯作者:

    邵士海 ssh@uestc.edu.cn

  • 中图分类号: TN911.7

A Timing Asynchronous Full Duplex Digital Self-interference Suppression Method by Segment Convolution

Funds: The National Natural Science Foundation of China (U19B2014, 61771107, 62071094, 61701075, 61601064, 61531009), The National Key R&D Program of China (2018YFB1801903), The Science and Technology Program of Sichuan Province (2020YFH0101)
  • 摘要: 同时同频全双工(CCFD)多载波信号时间异步场景下,有用信号(SoI)与自干扰信号(SI)多径最大时差超出循环前缀长度(CP),有用信号与自干扰信号子载波不正交,造成频域自干扰抑制性能严重下降。针对上述问题,该文提出一种时间异步数字域分段卷积的自干扰抑制方法,建立了自干扰分段、频域重建、叠加抵消的自干扰抑制过程,提升了时间异步场景下自干扰抑制性能。理论和仿真结果表明,在异步场景下,采用分段卷积的自干扰抑制方法可以直接在频域重建自干扰,达到与同步场景相当的干扰抑制性能。
  • 图  1  有用信号与自干扰信号同步状态示意图

    图  2  有用信号与自干扰信号异步状态示意图

    图  3  分段重叠相加法示意图

    图  4  自干扰信号与有用信号帧结构示意图

    图  5  干扰功率为30 dBm时,残余干扰功率与干噪比的关系

    图  6  干噪比为50 dB时,残余干扰功率与相对时延的关系

    图  7  误码率与信噪比的关系

    表  1  数值与仿真分析的参数设置

    参数数值
    OFDM符号数据位长度${N_b}$1024
    OFDM符号长度$N$1096
    分段重建FFT点数$K$1024
    每个OFDM符号划分段数$M$2
    调制方式64 QAM
    有用信号多径信道TDL_A_30 ns[18]
    自干扰信号多径信道TDL_A_10 ns[18]
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-01-08
  • 修回日期:  2021-06-09
  • 网络出版日期:  2021-08-24
  • 刊出日期:  2022-04-18

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