多抽头结构的宽带射频干扰对消及优化设计

doi:10.12305/j.issn.1001-506X.2023.09.05

系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (9): 2681-2689.doi: 10.12305/j.issn.1001-506X.2023.09.05

多抽头结构的宽带射频干扰对消及优化设计

秦焕丁¹^,², 孟进¹^,², 何方敏¹^,²^,*, 刘永才¹^,², 王青¹^,², 王衡峰¹^,²

1. 海军工程大学军用电气科学与技术研究所, 湖北武汉 430033
2. 海军工程大学舰船综合电力技术国防科技重点实验室, 湖北武汉 430033

收稿日期:2022-02-23 出版日期:2023-08-30 发布日期:2023-09-05
通讯作者: 何方敏
作者简介:秦焕丁(1992—), 男, 助理研究员, 博士, 主要研究方向为电磁兼容、自适应干扰对消
孟进 (1977—), 男, 教授, 博士, 主要研究方向为电力电子系统的电磁兼容
何方敏 (1982—), 男, 教授, 博士, 主要研究方向为电磁兼容、数字信号处理
刘永才 (1988—), 男, 助理研究员, 博士, 主要研究方向为电子对抗、数字信号处理
王青 (1987—), 男, 副研究员, 博士, 主要研究方向为卫星通信、数字信号处理
王衡峰 (1992—), 男, 助理研究员, 博士, 主要研究方向为阵列天线、宽带天线、通信中的电磁兼容性
基金资助:
国家杰出青年基金(52025072);国家自然科学基金(61801501);国家自然科学基金(62001497);湖北省自然科学基金(2019CFB257)

Optimization design of wideband RF interference cancellation based on multi-tap structure

Huanding QIN¹^,², Jin MENG¹^,², Fangmin HE¹^,²^,*, Yongcai LIU¹^,², Qing WANG¹^,², Hengfeng WANG¹^,²

1. Institute of Military Electrical Science and Technology, Naval University of Engineering, Wuhan 430033, China
2. National Key Laboratory of Science and Technology on Vessel Integrated Power System, Naval University of Engineering, Wuhan 430033, China

Received:2022-02-23 Online:2023-08-30 Published:2023-09-05
Contact: Fangmin HE

摘要/Abstract

摘要：

多抽头对消结构可用于抑制大功率发射机产生的宽带噪声干扰, 抽头数目和抽头延时间隔的选取直接影响干扰抑制效果, 但是现有文献缺少其选取策略及对多抽头干扰对消系统性能的影响分析。针对此问题, 建立了多抽头数模混合对消系统的理论模型, 求解了抽头权值的最优值, 首次得到了抽头数目和抽头延时间隔与对消比、收敛速度之间的解析关系。针对权值估计复杂的问题, 提出了指数形式的迭代加权方法, 有效提高了权值的估计精度和干扰对消比。针对抽头数目和抽头延时间隔的选取策略, 提出了对消比最高、收敛速度最快的选取准则, 大大降低了费效比, 可用于指导多抽头对消结构中抽头数目和延时间隔的选择。结果表明, 对于带宽为30 MHz的信号, 系统优化后的对消比不低于33 dB, 有效解决了宽带干扰问题。

关键词: 多抽头, 抽头数目, 抽头延时间隔, 对消比, 收敛速度

Abstract:

The multi-tap interference cancellation structure can be used to suppress the wideband noise interference generated by high-power transmitters. The selection of the number of taps and the tap delay interval directly affects the interference suppression effect. However, the existing references lack selection methods and the analysis of the impact of multi-tap interference cancellation system performance. To solve this problem, the theoretical model of the multi-tap digital-analog hybrid cancellation system is established, the optimal value of the tap weight is solved, and the analytical relationship between the tap number and delay interval and the interference cancellation ratio (ICR) and convergence speed is obtained for the first time. To reduce the complexity of weight estimation, the exponential iterative weighting method is proposed, which effectively improves the weight estimation accuracy and the ICR. For the selection strategy of the number of taps and the tap delay interval, the selection criterion with the highest ICR and the fastest convergence speed is proposed, which greatly reduces the cost-effectiveness ratio and can provide reference for the selection of the number of taps and tap delay interval in the multi-tap cancellation structure. The results show that for the signal with a bandwidth of 30 MHz, the ICR of the optimized system is not less than 33 dB, which effectively solves the problem of wideband interference.

Key words: multi-tap, number of taps, tap delay interval, interference cancellation ratio (ICR), convergence speed

中图分类号:

TN911.4

秦焕丁, 孟进, 何方敏, 刘永才, 王青, 王衡峰. 多抽头结构的宽带射频干扰对消及优化设计[J]. 系统工程与电子技术, 2023, 45(9): 2681-2689.

Huanding QIN, Jin MENG, Fangmin HE, Yongcai LIU, Qing WANG, Hengfeng WANG. Optimization design of wideband RF interference cancellation based on multi-tap structure[J]. Systems Engineering and Electronics, 2023, 45(9): 2681-2689.

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参考文献 31

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路径号	延时/ns	幅度衰减/dB
1	1	0.454 4
2	2	0.141 3
3	5	-0.094 7
4	7	0.213 0
5	10	0.129 7

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多抽头结构的宽带射频干扰对消及优化设计

Optimization design of wideband RF interference cancellation based on multi-tap structure

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抽头数目	仿真结果/dB	实验结果/dB
3	41	38
4	46	43
5	51	48
6	56	51
7	52	47
8	47	43