基于自适应感知的OFDM宽带测控抗干扰方法

doi:10.3969/j.issn.1001-506X.2020.05.26

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (5): 1166-1172.doi: 10.3969/j.issn.1001-506X.2020.05.26

基于自适应感知的OFDM宽带测控抗干扰方法

高喜俊(), 贾红霞(), 陈自力(), 袁国刚()

陆军工程大学石家庄校区无人机工程系, 河北石家庄 050003

收稿日期:2019-08-01 出版日期:2020-04-30 发布日期:2020-04-30
作者简介:高喜俊 (1986-),男,讲师,博士,主要研究方向为无人机测控抗干扰技术。E-mail:xijun_oec@139.com|贾红霞 (1987-),女,工程师,硕士,主要研究方向为无人机测控传输技术。E-mail:doudou19861018@126.com|陈自力 (1964-),男,教授,硕士,主要研究方向为无人机测控技术、无人机系统运用技术。E-mail:chenzili@oec.mtn|袁国刚 (1994-),男,博士研究生,主要研究方向为无人机测控抗干扰技术。E-mail:18228384858@163.com
基金资助:
装备预研项目(414110402)

Anti-jamming method of OFDM wide-band measuring and controlling based on adaptive sensing

Xijun GAO(), Hongxia JIA(), Zili CHEN(), Guogang YUAN()

Unmanned Aerial Vehicle Engineer Department, Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, China

Received:2019-08-01 Online:2020-04-30 Published:2020-04-30
Supported by:
装备预研项目(414110402)

摘要/Abstract

摘要：

针对正交频分复用(orthogonal frequency-division multiplexing, OFDM)宽带测控中难以有效对抗干扰的问题,提出多门限的快速傅里叶变换(fast Fourier transform, FFT)和小波包联合自适应频谱感知来实现宽带OFDM频谱重构抗干扰。该方法首先通过固定双门限FFT能量感知进行带宽内高干噪比干扰初检测,然后通过自适应小波包频谱感知实现剩余低干噪比频宽内的干扰检测,最后根据频谱感知结果,对OFDM宽带测控系统的频谱进行重构,实现干扰规避。实验结果表明,感知算法方法具有较好的干扰检测性能,并能够实现OFDM宽带测控系统的有效抗干扰。

关键词: 正交频分复用测控, 自适应感知, 频谱重构, 抗干扰

Abstract:

Aiming at the problem that the jamming cannot be restrained well in the orthogonal frequency-division multiplexing (OFDM) wide-band measuring and controlling system, the joint adaptive spectrum sensing based on fast Fourier transform (FFT) and wavelet packet of the multi-threshold is proposed to realize anti-jamming of OFDM wide-band spectrum reconstruction. Firstly, the high interference-to-noise ratio (INR) jamming is detected preliminaily by the FFT energy sensing of the fixed double-threshold in the bandwidth. Then the surplus low INR jamming is detected by adaptive wavelet packet sensing. Finally, according to the result of spectrum sensing, the spectrum of the OFDM wide-band measuring and controlling system is reconstructed to realize the jamming avoidance. Experiment results show that the sensing algorithm can detect the jamming well and the OFDM wide-band measuring and controlling system can restrain the jamming effectively.

Key words: orthogonal frequency-division multiplexing (OFDM) measuring and controlling, adaptive sensing, spectrum reconstruction, anti-jamming

中图分类号:

TN973.2+1

高喜俊, 贾红霞, 陈自力, 袁国刚. 基于自适应感知的OFDM宽带测控抗干扰方法[J]. 系统工程与电子技术, 2020, 42(5): 1166-1172.

Xijun GAO, Hongxia JIA, Zili CHEN, Guogang YUAN. Anti-jamming method of OFDM wide-band measuring and controlling based on adaptive sensing[J]. Systems Engineering and Electronics, 2020, 42(5): 1166-1172.

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基于自适应感知的OFDM宽带测控抗干扰方法

Anti-jamming method of OFDM wide-band measuring and controlling based on adaptive sensing

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