窄带干扰信号对北斗三号B2信号质量的影响

doi:10.12305/j.issn.1001-506X.2022.07.25

系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (7): 2286-2292.doi: 10.12305/j.issn.1001-506X.2022.07.25

窄带干扰信号对北斗三号B2信号质量的影响

王鹏博^1,², 贺成艳^1,*, 杨倩倩^1,², 佟文华^1,³

1. 中国科学院国家授时中心, 陕西西安 710600
2. 中国科学院大学微电子学院, 北京 101408
3. 中国科学院大学电子电气与通信工程学院, 北京 101408

收稿日期:2021-06-24 出版日期:2022-06-22 发布日期:2022-06-28
通讯作者: 贺成艳
作者简介:王鹏博(1997—), 女, 硕士研究生, 主要研究方向为卫星导航基带信号处理、信号质量评估技术|贺成艳(1986—), 女, 副研究员, 硕士研究生导师, 博士, 主要研究方向为卫星导航信号处理、信号质量评估技术|杨倩倩(1996—), 女, 硕士研究生, 主要研究方向为卫星导航信号技术、信号质量评估|佟文华(1996—), 女, 硕士研究生, 主要研究方向为北斗+自组织网络融合定位
基金资助:
国家自然科学基金青年基金(61501430);地理信息工程国家重点实验室开放基金(SKLGIE2017-M-2-2)

Impact of narrowband interference on the BDS-3 B2 signal quality

Pengbo WANG^1,², Chengyan HE^1,*, Qianqian YANG^1,², Wenhua TONG^1,³

1. National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China
2. School of Microelectronics, University of Chinese Academy of Sciences, Beijing 101408, China
3. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China

Received:2021-06-24 Online:2022-06-22 Published:2022-06-28
Contact: Chengyan HE

摘要/Abstract

摘要：

北斗三号全球卫星导航系统正式开通, 面对空间电磁环境日趋复杂, 地面接收信号功率微弱等问题, 强干扰下的B2新信号, 对信号质量提出新的挑战及更高的要求。对此, 建立了B2信号及窄带干扰信号模型, 仿真分析窄带干扰信号在不同中频、带宽、干信比条件下对信号功率谱偏差、相关损耗、S曲线过零点偏差的影响, 并用实测信号进行验证。研究结果表明, 窄带干扰信号参数变化对信号质量影响较大, 干扰环境恶劣时, 信号质量明显变差, 导致伪距测量误差较大, 影响用户定位精度。研究成果可为干扰监测评估及信号质量评估提供参考依据。

关键词: 北斗三号全球卫星导航系统, 窄带干扰, 信号质量, 干信比

Abstract:

Since the BeiDou navigation satellite system (BDS-3) was officially launched, and as the space electronmagnetic environment is becoming increasingly complex, and the received signal power is weak, the new B2 signal under strong interference poses new challenges and higher requirements for signal quality. The paper simulated the B2 signal and narrowband interference signal models, analyzed the effects of narrowband interference on power spectrum deviation, correlation loss and S-curve biases (SCB) under different parameters, such as intermediate frequency, bandwidth, and the jamming to signal ratio (JSR). And the real signal data collected by the 40-meter antenna system was used for verification. The results of the study show that the variation of interference signal parameters has a significant impact on the signal quality, and the signal quality deteriorates significantly when the interference environment is harsh, leading to large pseudorange measurement errors and affecting user positioning accuracy. The research results of this paper provide a valuable reference for interference monitoring assessment and signal quality assessment.

Key words: BeiDou-3 navigation satellite system (BDS-3), narrowband interference, signal quality, jamming to signal ratio (JSR)

中图分类号:

TN911.6

王鹏博, 贺成艳, 杨倩倩, 佟文华. 窄带干扰信号对北斗三号B2信号质量的影响[J]. 系统工程与电子技术, 2022, 44(7): 2286-2292.

Pengbo WANG, Chengyan HE, Qianqian YANG, Wenhua TONG. Impact of narrowband interference on the BDS-3 B2 signal quality[J]. Systems Engineering and Electronics, 2022, 44(7): 2286-2292.

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信号	信号分量	载波频率/MHz	调制方式	带宽/MHz	符号速率/sps	相位关系/(°)	功率比/%
B2a	B2a_data	1 176.45	QPSK(10)	20.46	200	0	27.8
B2a	B2a_pilot	1 176.45	QPSK(10)	20.46	0	90	27.8
B2b	B2b_I	1 207.14	BPSK(10)	20.46	1 000	0	22.2
B2b	B2b_Q	1 207.14	BPSK(10)	20.46	未公开数据	90	22.2

干扰中频/MHz	干扰带宽/MHz	JSR/dB
47.5	1.023	-15~12
	2.046	-15~12
	4.092	-15~12
52.5	1.023	-15~12
	2.046	-15~12
	4.092	-15~12

评估参数	干扰中频	干扰带宽	JSR
功率谱偏差	越接近主瓣中心处影响越大	带宽越大影响越大	JSR越大影响越大
相关损耗	越接近主瓣中心处影响越大	影响甚微	JSR越大影响越大, 且在JSR为-14 dB处达到指标临界值
S曲线过零点偏差	越接近主瓣中心处影响越大	带宽越大影响越大	JSR越大影响越大, 且存在超差趋势

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窄带干扰信号对北斗三号B2信号质量的影响

Impact of narrowband interference on the BDS-3 B2 signal quality

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