基于分块重组与去相关的5G信号模糊函数副峰联合抑制方法

doi:10.12305/j.issn.1001-506X.2025.11.09

系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (11): 3598-3611.doi: 10.12305/j.issn.1001-506X.2025.11.09

• 传感器与信号处理 • 上一篇

基于分块重组与去相关的5G信号模糊函数副峰联合抑制方法

马帅¹^,²(), 杨泽琦¹^,²(), 常凯³(), 刘宁³(), 吕晓德¹^,*()

1. 中国科学院空天信息创新研究院微波成像全国重点实验室，北京 100190
2. 中国科学院大学电子电气与通信工程学院，北京 100049
3. 中国人民解放军 32802部队，北京 100083

收稿日期:2025-03-18 接受日期:2025-07-01 出版日期:2025-11-25 发布日期:2025-12-08
通讯作者: 吕晓德 E-mail:mashuai22@mails.ucas.ac.cn;yangzeqi22@mails.ucas.ac.cn;kerkaichance@gmail.com;978599056@qq.com;lvxd@aircas.ac.cn
作者简介:马　帅（2000—），男，硕士研究生，主要研究方向为无源雷达信号处理
杨泽琦（2000—），女，博士研究生，主要研究方向为无源雷达信号处理
常　凯（1987—），男，工程师，博士，主要研究方向为多无人机信息系统、自适应控制
刘　宁（1965—），女，高级工程师，硕士，主要研究方向为控制工程、无线定位技术

Joint suppression method of ambiguity function sidelobe in 5G signals via blockwise reconstruction and decorrelation

Shuai MA¹^,²(), Zeqi YANG¹^,²(), Kai CHANG³(), Ning LIU³(), Xiaode LYU¹^,*()

1. National Key Laboratory of Microwave Imaging，Aerospace Information Research Institute，Chinese Academy of Sciences，Beijing 100190，China
2. School of Electronic，Electrical and Communication Engineering，University of Chinese Academy of Sciences，Beijing 100049，China
3. Unit 32802 of the PLA，Beijing 100083，China

Received:2025-03-18 Accepted:2025-07-01 Online:2025-11-25 Published:2025-12-08
Contact: Xiaode LYU E-mail:mashuai22@mails.ucas.ac.cn;yangzeqi22@mails.ucas.ac.cn;kerkaichance@gmail.com;978599056@qq.com;lvxd@aircas.ac.cn

摘要/Abstract

摘要：

针对5G信号中帧结构的循环前缀和周期性同步信号块引发模糊函数副峰，造成目标检测出现虚警或漏警的问题，提出基于分块重组与去相关的5G信号副峰联合抑制方法。通过对多普勒维同步信号块进行去相关处理，对距离维循环前缀进行提取重组，消除由信号中的特定结构引起的相关性因素，联合抑制距离维和多普勒维副峰，使得主峰信噪比损失小且基本不影响信号的相干积累。该结果可为基于5G信号的无源雷达副峰抑制提供一定的思路。

关键词: 无源雷达, 5G, 模糊函数, 副峰抑制

Abstract:

To address the issue of ambiguous function sidelobe caused by the cyclic prefix and periodic synchronization signal blocks in the frame structure of 5G signals, which leads to false alarms or missed detections in target detection, a joint suppression method for 5G signal sidelobe based on blockwise and decorrelation is proposed. By performing decorrelation processing on the Doppler-dimensional synchronization signal block, extracting and recombining the cyclic prefix in the range-dimension to eliminate correlation factors caused by specific structures in the signal, and jointly suppressing the range-dimensional and Doppler-dimensional sidelobe, the main peak signal-to-noise ratio loss is small and does not significantly affect the coherent accumulation of the signal. This result can provide some ideas for passive radar sidelobe suppression based on 5G signals.

Key words: passive radar, 5G, ambiguity function, sidelobe suppression

中图分类号:

TN 958.97

马帅, 杨泽琦, 常凯, 刘宁, 吕晓德. 基于分块重组与去相关的5G信号模糊函数副峰联合抑制方法[J]. 系统工程与电子技术, 2025, 47(11): 3598-3611.

Shuai MA, Zeqi YANG, Kai CHANG, Ning LIU, Xiaode LYU. Joint suppression method of ambiguity function sidelobe in 5G signals via blockwise reconstruction and decorrelation[J]. Systems Engineering and Electronics, 2025, 47(11): 3598-3611.

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FR频段	对应的频率范围/GHz	定义的最大信道带宽/MHz
FR1	0.41~7.125	100
FR2	24.25~52.6	400

子载波间隔/kHz	OFDM符号长度/μs	NCP长度/μs
15	66.67	4.69
30	33.33	2.34
60	16.67	1.17

参数名	参数设置
信号链路	下行链路
频谱范围	FR1
调制方式	16QAM
信道带宽/MHz	20
信号SCS/kHz	15
SSB/PBCH周期/ms	5
信号帧长度/ms	30

SCS/kHz	OFDM符号长度/μs	距离维副峰位置/μs
15	66.6667	66.6667
30	33.3333	33.3333
60	16.6667	16.6667

模式	n的取值		位置索引
模式	Fc$ \le $3 GHz	3 GHz$ \le $Fc<8 GHz	位置索引
模式A（15 kHz）	n=0,1	n=0,1,2,3	{2,8}+14n
模式B（30 kHz）	n=0,1	n=0,1	{4,8,6,20}+28n
模式C（60 kHz）	n=0,1	n=0,1,2,3	{2,8}+14n

基于分块重组与去相关的5G信号模糊函数副峰联合抑制方法

Joint suppression method of ambiguity function sidelobe in 5G signals via blockwise reconstruction and decorrelation

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摘要/Abstract

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图/表 24

参考文献 31

相关文章 15

编辑推荐

Metrics

本文评价

模式	SCS/kHz	距离维副峰
模式	SCS/kHz	副峰位置/μs	抑制前幅度/dB	抑制后幅度/dB	副峰抑制比/dB
模式A	15	66.67	18.05	3.61	14.44
模式B	30	33.33	23.76	18.91	4.85
模式C	60	16.67	29.06	22.64	6.42

模式	副峰周期/Hz	副峰抑制	主峰幅度/dB	副峰幅度/dB	峰值旁瓣比/dB
模式A	200	处理前	41.11	17.47	−23.64
模式A	200	处理后	40.46	6.10	−34.36
模式B	200	处理前	47.02	23.76	−23.26
模式B	200	处理后	46.26	14.93	−31.33
模式C	200	处理前	52.51	29.06	−23.45
模式C	200	处理后	52.11	23.66	−28.45

SSB周期/ms	多普勒副峰周期/Hz	抑制前幅值/dB	抑制后幅值/dB	副峰抑制比/dB
5	200	17.473	6.095	11.378
10	100	17.527	6.526	11.001
20	50	14.617	6.586	8.031
40	25	14.688	6.733	7.955
80	12.5	17.527	6.657	10.87
160	6.25	16.768	6.852	9.916

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