机载超短波电台邻道干扰减敏特性建模与评估

武南开; 苏东林; 何洪涛; 刘焱

doi:10.13700/j.bh.1001-5965.2016.0230

机载超短波电台邻道干扰减敏特性建模与评估

doi: 10.13700/j.bh.1001-5965.2016.0230

1.
北京航空航天大学电子信息工程学院, 北京 100083
2.
中国洛阳电子装备试验中心, 洛阳 471003

基金项目:

国家自然科学基金 61521091

国家自然科学基金 61427803

详细信息

作者简介:
武南开, 男, 博士研究生。主要研究方向:机载设备电磁干扰预测与评估、电台接收机非线性建模等

苏东林, 女, 博士, 教授, 博士生导师。主要研究方向:电磁兼容、电磁环境效应、计算电磁学、射频微波电路与系统、新型飞行器机载共形/共用/小型化天线等

何洪涛, 男, 博士, 高级工程师。主要研究方向:电磁兼容试验技术、复杂电磁环境效应评估等

通讯作者:
苏东林, E-mail:sdl@buaa.edu.cn

中图分类号: TN911.4
计量
- 文章访问数: 1084
- HTML全文浏览量: 146
- PDF下载量: 605
- 被引次数: 0
出版历程
- 收稿日期: 2016-03-24
- 录用日期: 2016-04-01
- 网络出版日期: 2017-03-20

Adjacent channel interference modeling and assessment on reduction of airborne VHF radio sensitivity

1.
School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2.
Chinese Luoyang Electronics Equipment Test Center, Luoyang 471003, China

Funds:

National Natural Science Foundation of China 61521091

National Natural Science Foundation of China 61427803

More Information

Corresponding author: SU Donglin, E-mail: sdl@buaa.edu.cn

摘要

摘要:
为了解决传统邻道干扰模型与测试数据对比误差较大的难题，将接收机射频前端的非线性响应模型和信噪比模型相融合，考虑到邻道干扰信号与本振相位噪声混频而产生的噪声，提出了噪声修正因子，进一步建立了超短波（VHF）电台接收机邻道干扰减敏模型，与典型实装测试数据相对比误差约为3dB，表明本文方法能够很好地描述邻道干扰的减敏特性。利用本文模型给出了机载超短波电台邻道干扰评估方法，结合直升机编队飞行时电台邻道干扰评估案例，验证了本文方法的适用性和有效性，具有一定的工程应用价值。
- 邻道干扰 /
- 非线性 /
- 信噪比 /
- 减敏 /
- 超短波 (VHF) 电台
Abstract:
Aimed at solving the problem of big error between the measured data and the calculated results of traditional adjacent interference model, the model of signal-to-noise ratio and the model of nonlinear response at receiver radio frequency front end are combined. Considering the noise generated by frequency mixing between adjacent frequency interference signal and the local oscillator phase noise, the model of the reduction of very high frequency (VHF) radio sensitivity is proposed by giving a noise correction factor. The error of the approach is about 3 dB compared with the typical measured data. The comparison between the calculated results and test data shows that the approach can describe the sensitive characteristics of adjacent channel interference accurately. The assessment method of the adjacent channel interference between airborne radios is presented by giving the calculation flow with helicopter fleet application example, which verifies the applicability and effectiveness of the above methods and shows that the approach and assessment method have certain engineering application value.
- adjacent channel interference /
- nonlinear /
- signal-to-noise ratio /
- reduction of sensitivity /
- very high frequency (VHF) radio

HTML全文

图 1 超短波电台接收机前端邻道干扰示意图

Figure 1. Schematic diagram of adjacent channel interference at front end of VHF radio receiver

下载: 全尺寸图片幻灯片

图 2 非线性输出项幅度和频率筛选

Figure 2. Output of nonlinear response screening by amplitude and frequency

下载: 全尺寸图片幻灯片

图 3 邻道干扰试验配置

Figure 3. Test configuration of adjacent channel interference

下载: 全尺寸图片幻灯片

图 4 信噪比下降3 dB和6 dB时干扰信号功率与频率偏差关系

Figure 4. Relation between interference signal power and frequency deviation when SNR decreases by 3 dB and 6 dB

下载: 全尺寸图片幻灯片

图 5 3种频率偏差下干扰信号功率与信噪比下降幅度关系

Figure 5. Relation between interference signal power and reduction of SNR under three kinds of frequency deviation

下载: 全尺寸图片幻灯片

图 6 3种频率偏差下计算与实测的信噪比下降误差对比

Figure 6. Error comparison between calculated and measured reduction of SNR under three kinds of frequency deviation

下载: 全尺寸图片幻灯片

图 7 机载超短波电台邻道干扰评估流程

Figure 7. Assessment procedure of adjacent channel interference of airborne VHF radio

下载: 全尺寸图片幻灯片

图 8 直升机编队飞行邻道干扰场景

Figure 8. Scene of helicopter formation flight interfered by adjacent channel

下载: 全尺寸图片幻灯片

图 9 干扰信号功率计算示意图

Figure 9. Schematic diagram of interference signal power calculation

下载: 全尺寸图片幻灯片

图 10 已知工作频率偏差的邻道干扰评估

Figure 10. Adjacent channel interference assessment of known operating frequency deviation

下载: 全尺寸图片幻灯片

图 11 不产生邻道干扰时的频率偏差评估

Figure 11. Assessment of frequency deviation without adjacent channel interference

下载: 全尺寸图片幻灯片

表 1 双信号输入下的前3阶非线性响应

Table 1. First three order nonlinear response of dual-channel input signal

编号	响应幅度	响应频率	响应类型
1	a₁v_I	ω_I	1阶线性
2	a₁v_S	ω_S	1阶线性
3	0.5a₂v_I²	2ω_I	2阶谐波
4	0.5a₂v_S²	2ω_S	2阶谐波
5	a₂v_Iv_S	ω_I±ω_S	2阶交调
6	0.25a₃v_I³	3ω_I	3阶谐波
7	0.25a₃v_S³	3ω_S	3阶谐波
8	0.75a₃v_I²v_S	2ω_I±ω_S	3阶交调
9	0.75a₃v_S²v_I	2ω_S±ω_I	3阶交调
10	0.75a₃v_I³	2ω_I-ω_I	3阶压缩
11	0.75a₃v_S³	2ω_S-ω_S	3阶压缩
12	1.5a₃v_Iv_S²	ω_I+ω_S-ω_S	3阶交调
13	1.5a₃v_Sv_I²	ω_S+ω_I-ω_I	3阶交调

下载: 导出CSV

参考文献(15)

[1]	苏东林, 王冰切, 金德琨, 等.电子战特种飞机电磁兼容预设计技术[J].北京航空航天大学学报, 2006, 32 (10):1241-1245. http://bhxb.buaa.edu.cn/CN/abstract/abstract9719.shtml SU D L, WANG B Q, JIN D K, et al.EMC pre-design technologies on EW special aircraft[J].Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(10):1241-1245(in Chinese). http://bhxb.buaa.edu.cn/CN/abstract/abstract9719.shtml
[2]	王冰切, 苏东林, 全力民, 等.电子战特种飞机的天线隔离度测试[J].宇航计量技术, 2007, 27(3):1-5. http://www.cnki.com.cn/Article/CJFDTOTAL-YHJJ200703003.htm WANG B Q, SU D L, QUAN L M, et al.Measurement between antennas on EW special aircraft[J].Journal of Astronautic Metrology and Measurement, 2007, 27(3):1-5(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-YHJJ200703003.htm
[3]	魏嘉利, 贾云峰, 谢树果, 等.航空电子系统电磁环境复杂度量化评估方法[J].航空学报, 2014, 35(2):487-496. http://www.cnki.com.cn/Article/CJFDTOTAL-HKXB201402020.htm WEI J L, JIA Y F, XIE S G, et al.Complexity assessment method on electromagnetic environment for avionic systems[J].Acta Aeronautica et Astronautica Sinica, 2014, 35(2):487-496(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-HKXB201402020.htm
[4]	杨志敏, 李式巨, 王彦波, 等.阻塞干扰下跳频通信系统差错控制[J].浙江大学学报 (工学版), 2008, 42(3):481-484. http://www.cnki.com.cn/Article/CJFDTOTAL-ZDZC200803022.htm YANG Z M, LI S J, WANG Y B, et al.Error control for frequency hopping communication systems under man-made noise[J].Journal of Zhejiang University (Engineering Science), 2008, 42(3):481-484(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-ZDZC200803022.htm
[5]	周文兵, 陈志君.直升机超短波通信链路分析[J].直升机技术, 2012(3):34-37. http://www.cnki.com.cn/Article/CJFDTOTAL-ZSEN201203007.htm ZHOU W B, CHEN Z J.Analysis of UHF communication link in helicopter[J].Helicopter Technique, 2012(3):34-37(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-ZSEN201203007.htm
[6]	何洪涛, 聂纯, 刘继东, 等.无线电接收机阻塞干扰响应的建模方法研究[J].微波学报, 2014, 30( http://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2014S2019.htm s2):61-64.HE H T, NIE C, LIU J D, et al.The study on the modeling method of blocking interference response of wireless receiver[J].Journal of Microwaves, 2014, 30(s2):61-64(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2014S2019.htm
[7]	成伟兰, 刘坚强, 谌丽.干扰条件下接收机减敏机理分析[J].舰船科学技术, 2012, 34(3):122-129. http://www.cnki.com.cn/Article/CJFDTOTAL-JCKX201203030.htm CHENG W L, LIU J Q, ZHAN L.Analysis of receiver desensitization mechanism in the presence of interference[J].Ship Science and Technology, 2012, 34(3):122-129(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-JCKX201203030.htm
[8]	赵波, 全厚德, 崔佩璋.同址干扰对车载通信系统的影响分析[J].系统仿真学报, 2012, 24(5):957-961. http://www.cnki.com.cn/Article/CJFDTOTAL-XTFZ201205003.htm ZHAO B, QUAN H D, CUI P Z.Analysis of co-site interference effect on vehicular communication system[J].Journal of System Simulation, 2012, 24(5):957-961(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-XTFZ201205003.htm
[9]	魏崇毓, 顾有军.CDMA/GSM双模双待机移动终端射频干扰的研究[J].微波学报, 2008, 24( http://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2008S1048.htm s1):202-207.WEI C Y, GU Y J.Study on RF interference of CDMA/GSM dual-mode mobile[J].Journal of Microwaves, 2008, 24(s1):202-207(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-WBXB2008S1048.htm
[10]	GOMES H C, CARVALHO N B.Interference cancellation:New configuration technique forcancellation of strong interferences from adjacent frequency bands[C]//Integrated Nonlinear Microwave and Millimetre-Wave Circuits.Piscataway, NJ:IEEE Press, 2008:65-68.
[11]	中国人民解放军总参谋部无线电管理技术站. 同站址干扰的评估方法: GJB 3624-1999[S]. 北京: 中国人民解放军总装备部, 1999: 9-10. The General Staff Radio Management Technology Station of Chinese People's Liberation Army.Methods for the evaluation of go-sit interference:GJB 3624-1999[S].Beijing:General Armament Department of Chinese People's Liberation Army, 1999:9-10(in Chinese).
[12]	张肇仪, 周乐柱, 吴德明.微波工程[M].3版.北京:电子工业出版社, 2006:430-437. ZHANG Z Y, ZHOU L Z, WU D M.Microwave engineering[M].3rd ed.Beijing:Publishing House of Electronics Industry, 2006:430-437(in Chinese).
[13]	GRAY B, PONTON M, SUARES A, et al.Analytical modeling of transducer gain and gain compression in degenerate parametric amplifiers[C]//Radio and Wireless Symposium.Piscataway, NJ:IEEE Press, 2012:351-354.
[14]	BASSEL F B.A study of nonlinearity including feedback memory with application to RF amplifiers[J].IEEE Transactions on Communications, 2016, 26(3):198-200. http://ieeexplore.ieee.org/document/7420628/
[15]	王琼, 苏东林, 谢树果, 等.射频接收机系统级建模中的噪声谱分析[J].北京航空航天大学学报, 2006, 32(4):395-398. http://bhxb.buaa.edu.cn/CN/abstract/abstract9853.shtml WANG Q, SU D L, XIE S G, et al.Noise density research in the system-modeling of RF receivers[J].Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(4):395-398(in Chinese). http://bhxb.buaa.edu.cn/CN/abstract/abstract9853.shtml