面向阵列级同时同频收发的宽带自干扰空域抑制

林朗; 赵宏志; 邵士海; 唐友喜

doi:10.11999/JEIT231036

面向阵列级同时同频收发的宽带自干扰空域抑制

doi: 10.11999/JEIT231036

1.
电子科技大学通信抗干扰全国重点实验室成都 611731
2.
电磁空间认知与智能控制技术实验室北京 100089

基金项目: 国家自然科学基金(U19B2014, 62071094, 61901396)

详细信息

作者简介:
林朗：女，博士生，研究方向为无线通信信号处理、通信抗干扰技术等

赵宏志：男，教授，博士生导师，研究方向为无线通信信号处理、通信抗干扰技术等

邵士海：男，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，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:
赵宏志　lyn@uestc.edu.cn

中图分类号: TN911.7
计量
- 文章访问数: 230
- HTML全文浏览量: 77
- PDF下载量: 47
- 被引次数: 0
出版历程
- 收稿日期: 2023-09-21
- 修回日期: 2024-04-08
- 网络出版日期: 2024-04-26
- 刊出日期: 2024-05-30

Broadband Spatial Self-Interference Cancellation for Full Duplexing Array

1.
National Key Laboratory of Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
Laboratory of Electromagnetic Space Cognition and Intelligent Control, Beijing 100089, China

Funds: The National Natural Science Foundation of China (U19B2014, 62071094, 61901396)

摘要

摘要: 具备阵列级同时同频收发能力的多功能一体化平台，面临发射阵列对接收阵列的强自干扰问题。针对这一问题，该文设计了一种宽带自干扰空域抑制方法，构造了限制主波束增益损失条件下，最小化残余自干扰和噪声功率的非凸优化问题，提出了交替迭代的优化算法联合求解发射和接收数字波束成形系数，从理论上分析了所提算法的自干扰抑制极限性能，并给出了所提算法的计算复杂度。分析和仿真结果表明，给定2.4 GHz工作频率，100 MHz带宽，主波束增益损失限制在3 dB时，收发各30阵元的相控阵列宽带自干扰空域抑制能力，即有效各向同性隔离度达到168 dB，距离自干扰抑制性能极限差距7 dB。
- 同时同频收发 /
- 数字波束成形 /
- 空域自干扰抑制
Abstract: The multi-functional integrated platform with simultaneous transmit and receive capability faces the strong Self-Interference (SI) coupled between the adjacent transmit and receive arrays. In this paper, a wideband SI cancellation method in the space domain for fully digital phased array systems is designed. A non-convex optimization problem is formulated to minimize the residual SI and noise power while constraining the loss of beamforming gain in the desired direction, and an alternate optimization method is proposed to jointly determine the transmit and receive beamforming weights, and the SI cancellation performance of the proposed algorithm is analyzed. Theoretical analysis and simulation results show that a 60-element array can achieve an Effective Isotropic Isolation (EII) of 168 dB when the central frequency is 2.4 GHz, the bandwidth is 100 MHz, and the beamforming gain loss is limited to 3 dB, which is 7 dB below the EII upper bound.
- Co-frequency co-time transmit and receive /
- Digital beamforming /
- Spatial self-interference cancellation

HTML全文

图 1 阵列级同时同频收发数字相控阵系统

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图 2 收发波束成形滤波器组

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图 3 收发数字相控阵列，位于xoy平面，z轴方向垂直指向纸外

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图 4 EII随天线单元数目变化图示(收发阵元数目相等)

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图 5 EII随天线单元数目变化图示(收发阵元数目不等)

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图 6 EII上界、本方法EII、均匀波束成形EII和ALSTAR方法EII随方位角变化图示

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图 7 波束远场方向图

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图 8 发射各阵元的发射功率与接收各阵元的入射功率

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